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1 /* |
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2 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * |
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4 * U.S. Government Rights - Commercial software. Government users are subject |
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5 * to the Sun Microsystems, Inc. standard license agreement and applicable |
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6 * provisions of the FAR and its supplements. |
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7 * |
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8 * |
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9 * This distribution may include materials developed by third parties. Sun, |
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10 * Sun Microsystems, the Sun logo and Solaris are trademarks or registered |
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11 * trademarks of Sun Microsystems, Inc. in the U.S. and other countries. |
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12 * |
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13 */ |
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14 /* |
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15 * Note: this file originally auto-generated by mib2c using |
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16 * : mib2c.iterate.conf,v 5.5 2002/12/16 22:50:18 hardaker Exp $ |
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17 */ |
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18 |
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19 #include <net-snmp/net-snmp-config.h> |
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20 #include <net-snmp/net-snmp-includes.h> |
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21 #include <net-snmp/agent/net-snmp-agent-includes.h> |
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22 #include "sunProcesses.h" |
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23 |
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24 #include <stdio.h> |
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25 #include <errno.h> |
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26 #include <sys/types.h> |
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27 #include <sys/procfs.h> |
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28 #include <sys/fcntl.h> |
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29 #include <sys/stat.h> |
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30 #include <sys/time.h> |
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31 #include <sys/mntent.h> |
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32 #include <sys/mnttab.h> |
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33 #include <ftw.h> |
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34 #include <stdlib.h> |
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35 #include <dirent.h> |
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36 #include <string.h> |
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37 #include <memory.h> |
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38 #include <pwd.h> |
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39 #include <syslog.h> |
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40 |
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41 #include "snmpvars.h" |
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42 #include "agent.h" |
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43 #include "asn1.h" |
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44 |
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45 /* The following code is borrowed from ps.c */ |
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46 #define NUID 64 |
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47 #define TRUE 1 |
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48 #define FALSE 0 |
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49 |
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50 #define NTTYS 20 /* max ttys that can be specified with the -t option */ |
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51 #define SIZ 30 /* max processes that can be specified with -p and -g */ |
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52 #define ARGSIZ 30 /* size of buffer holding args for -t, -p, -u options */ |
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53 |
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54 #define FSTYPE_MAX 8 |
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55 |
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56 #ifndef MAXLOGIN |
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57 #define MAXLOGIN 8 /* max number of chars in login that will be printed */ |
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58 #endif |
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59 |
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60 #define UDQ 50 |
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61 |
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62 |
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63 static struct prpsinfo info; /* process information structure from /proc */ |
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64 |
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65 char *ttyname(); |
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66 static char *psfile = "/tmp/mibiisa_ps_data"; |
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67 |
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68 |
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69 static int ndev; /* number of devices */ |
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70 static int maxdev; /* number of devl structures allocated */ |
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71 |
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72 #define DNSIZE 14 |
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73 static struct devl { /* device list */ |
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74 char dname[DNSIZE]; /* device name */ |
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75 dev_t dev; /* device number */ |
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76 } *devl = NULL; |
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77 |
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78 static char *procdir = "/proc"; /* standard /proc directory */ |
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79 static int rd_only = 0; /* flag for remote filesystem read-only */ |
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80 void usage(); /* print usage message and quit */ |
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81 |
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82 static time_t ps_cache_time = 0; |
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83 time_t cache_now = 0; |
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84 int cache_lifetime = 45; |
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85 |
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86 static void call_ftw_for_dev(void); |
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87 static void wrdata(); |
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88 static void write_tmp_file(); |
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89 static int isprocdir(); |
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90 static void get_ps_data(void); |
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91 static void clean_ps(ps_ldata_t *); |
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92 static char *get_usr_name(uid_t); |
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93 static ps_data_t *find_ps_data(pid_t pid); |
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94 static void pr_ps(void); |
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95 |
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96 ps_data_t *pstable = PS_NULL; |
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97 int pstable_lines = 0; /* # of items in memory block pointed */ |
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98 /* to by pstable. */ |
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99 |
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100 static void |
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101 clean_ps(ps_ldata_t *head) |
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102 { |
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103 if (head != PS_LNULL) { |
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104 ps_ldata_t *pdp; |
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105 ps_ldata_t *nxt; |
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106 for (pdp = head; pdp != PS_LNULL; pdp = nxt) { |
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107 nxt = pdp->link; |
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108 free(pdp); |
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109 } |
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110 } |
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111 } |
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112 |
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113 static int |
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114 pscomp(ps_data_t *i, ps_data_t *j) |
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115 { |
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116 return (i->pid - j->pid); |
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117 } |
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118 |
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119 static struct ncache { |
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120 uid_t uid; |
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121 char name[USRNM_SZ+1]; |
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122 } nc[NUID]; |
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123 |
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124 /* |
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125 * This function assumes that the password file is hashed |
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126 * (or some such) to allow fast access based on a uid key. |
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127 */ |
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128 static char * |
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129 get_usr_name(uid_t uid) |
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130 { |
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131 struct passwd *pw; |
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132 int cp; |
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133 |
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134 #if (((NUID) & ((NUID) - 1)) != 0) |
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135 cp = uid % (NUID); |
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136 #else |
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137 cp = uid & ((NUID) - 1); |
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138 #endif |
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139 if (uid >= 0 && nc[cp].uid == uid && nc[cp].name[0]) |
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140 return (nc[cp].name); |
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141 pw = getpwuid(uid); |
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142 if (!pw) |
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143 return ((char *)0); |
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144 nc[cp].uid = uid; |
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145 strncpy(nc[cp].name, pw->pw_name, USRNM_SZ); |
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146 |
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147 return (nc[cp].name); |
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148 } |
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149 |
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150 void |
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151 pr_ps(void) |
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152 { |
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153 ps_data_t *psp; |
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154 int lines; |
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155 |
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156 printf("%d entries\n", pstable_lines); |
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157 printf("UID PID PPID SZ USR WCHAN TTY CPU CMD \n\n"); |
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158 |
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159 for (psp = pstable, lines = 0; lines < pstable_lines; psp++, lines++) { |
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160 printf("%d %u %u %d %s %s %s %d %s\n", |
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161 psp->uid, |
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162 psp->pid, |
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163 psp->ppid, |
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164 psp->sz, |
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165 psp->usrname, |
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166 psp->wchan, |
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167 psp->tty, |
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168 psp->cpu, |
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169 psp->cmd); |
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170 } |
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171 } |
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172 |
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173 /* |
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174 * Locate a particular PID. |
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175 * Return a pointer to the entry or NULL if not found. |
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176 */ |
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177 static ps_data_t * find_ps_data(pid_t pid) |
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178 { |
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179 ps_data_t *psp; |
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180 ps_data_t key; |
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181 |
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182 key.pid = pid; |
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183 |
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184 /* Should add a cache here */ |
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185 |
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186 psp = (ps_data_t *)bsearch((char *)&key, (char *)pstable, |
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187 pstable_lines, sizeof (ps_data_t), |
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188 (int (*)())pscomp); |
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189 return (psp); |
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190 } |
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191 |
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192 |
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193 void |
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194 get_ps_data(void) |
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195 { |
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196 ps_ldata_t *ps_last = PS_LNULL; |
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197 ps_ldata_t *ps_head = PS_LNULL; |
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198 ps_ldata_t *psp; |
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199 ps_data_t *pstp; |
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200 static char *usrname; |
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201 int i = 0; |
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202 DIR *dirp; |
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203 struct dirent *dentp; |
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204 char pname[MAXNAMELEN]; |
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205 int pdlen; |
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206 char *gettty(); |
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207 |
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208 if (pstable != PS_NULL) { /* Don't run ps unless we need to */ |
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209 if ((cache_now - ps_cache_time) <= cache_lifetime) |
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210 return; |
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211 free(pstable); |
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212 } |
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213 |
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214 pstable_lines = 0; |
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215 ps_cache_time = cache_now; |
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216 /* |
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217 * Determine root path for remote machine. |
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218 */ |
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219 if (!readata()) { /* get data from psfile */ |
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220 call_ftw_for_dev(); |
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221 wrdata(); |
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222 } |
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223 |
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224 /* |
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225 * Determine which processes to print info about by searching |
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226 * the /proc directory and looking at each process. |
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227 */ |
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228 if ((dirp = opendir(procdir)) == NULL) { |
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229 (void) SYSLOG0("Cannot open PROC directory\n"); |
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230 return; |
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231 } |
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232 |
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233 (void) strcpy(pname, procdir); |
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234 pdlen = strlen(pname); |
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235 pname[pdlen++] = '/'; |
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236 |
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237 /* for each active process --- */ |
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238 while (dentp = readdir(dirp)) { |
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239 int procfd; |
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240 |
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241 if (dentp->d_name[0] == '.') /* skip . and .. */ |
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242 continue; |
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243 (void) strcpy(pname + pdlen, dentp->d_name); |
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244 retry: |
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245 if ((procfd = open(pname, O_RDONLY)) == -1) |
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246 continue; |
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247 |
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248 /* |
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249 * Get the info structure for the process and close quickly. |
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250 */ |
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251 if (ioctl(procfd, PIOCPSINFO, (char *)&info) == -1) { |
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252 int saverr = errno; |
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253 |
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254 (void) close(procfd); |
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255 if (saverr == EAGAIN) |
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256 goto retry; |
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257 if (saverr != ENOENT) |
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258 (void) SYSLOG2("PIOCPSINFO on %s: %s\n", |
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259 pname, strerror(saverr)); |
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260 continue; |
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261 } |
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262 (void) close(procfd); |
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263 if ((psp = (ps_ldata_t *)malloc(sizeof (ps_ldata_t))) == PS_LNULL) |
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264 break; |
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265 memset((char *)psp, 0, sizeof (ps_ldata_t)); |
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266 psp->pdata.uid = info.pr_uid; |
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267 psp->pdata.pid = info.pr_pid; |
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268 psp->pdata.ppid = info.pr_ppid; |
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269 psp->pdata.sz = info.pr_size; |
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270 if (info.pr_wchan) |
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271 sprintf(psp->pdata.wchan, "%9x", info.pr_wchan); |
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272 else |
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273 strcpy(psp->pdata.wchan, " "); |
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274 memset(&psp->pdata.stat[0], 0, STAT_SZ+1); |
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275 if (info.pr_sname) |
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276 psp->pdata.stat[0] = info.pr_sname; |
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277 i = 0; |
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278 strcpy(psp->pdata.tty, (char *)gettty(&i)); |
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279 psp->pdata.cpu = info.pr_time.tv_sec; |
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280 strcpy(psp->pdata.cmd, info.pr_fname); |
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281 |
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282 if ((usrname = (get_usr_name(psp->pdata.uid))) != NULL) |
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283 strncpy(psp->pdata.usrname, usrname, USRNM_SZ); |
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284 else { |
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285 free(psp); |
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286 continue; |
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287 } |
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288 |
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289 psp->pdata.usrname[USRNM_SZ] = '\0'; |
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290 pstable_lines++; |
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291 if (ps_last == PS_LNULL) |
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292 ps_head = psp; |
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293 else |
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294 ps_last->link = psp; |
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295 ps_last = psp; |
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296 } |
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297 |
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298 (void) closedir(dirp); |
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299 if ((pstable = (ps_data_t *)malloc(pstable_lines |
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300 * sizeof (ps_data_t))) == PS_NULL) { |
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301 clean_ps(ps_head); |
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302 return; |
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303 } |
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304 for (pstp = pstable, psp = ps_head; psp != PS_LNULL; |
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305 pstp++, psp = psp->link) { |
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306 memcpy((char *)pstp, (char *)&(psp->pdata), sizeof (ps_data_t)); |
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307 } |
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308 clean_ps(ps_head); |
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309 qsort(pstable, pstable_lines, sizeof (ps_data_t), (int (*)())pscomp); |
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310 } |
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311 |
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312 int |
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313 readata() |
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314 { |
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315 struct stat sbuf1, sbuf2; |
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316 int fd; |
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317 |
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318 if ((fd = open(psfile, O_RDONLY)) == -1) |
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319 return (0); |
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320 |
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321 if (fstat(fd, &sbuf1) < 0 || sbuf1.st_size == 0 || |
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322 stat("/dev", &sbuf2) == -1 || sbuf1.st_mtime <= sbuf2.st_mtime || |
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323 sbuf1.st_mtime <= sbuf2.st_ctime) { |
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324 |
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325 if (!rd_only) { /* if read-only, believe old data */ |
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326 (void) close(fd); |
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327 return (0); |
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328 } |
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329 } |
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330 |
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331 /* Read /dev data from psfile. */ |
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332 if (read_tmp_file(fd, (char *) &ndev, sizeof (ndev)) == 0) { |
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333 (void) close(fd); |
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334 return (0); |
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335 } |
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336 |
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337 if (devl) |
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338 free(devl); |
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339 |
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340 if ((devl = (struct devl *)malloc(ndev * sizeof (*devl))) == NULL) { |
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341 SYSLOG1("malloc() for device table failed, %s\n", strerror(errno)); |
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342 exit(1); |
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343 } |
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344 if (read_tmp_file(fd, (char *)devl, ndev * sizeof (*devl)) == 0) { |
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345 (void) close(fd); |
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346 return (0); |
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347 } |
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348 |
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349 (void) close(fd); |
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350 return (1); |
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351 } |
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352 |
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353 /* |
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354 * call_ftw_for_dev() uses ftw() to pass pathnames under /dev to gdev() |
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355 * along with a status buffer. |
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356 */ |
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357 static void |
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358 call_ftw_for_dev(void) |
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359 { |
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360 int gdev(); |
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361 int rcode; |
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362 |
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363 ndev = 0; |
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364 rcode = ftw("/dev", gdev, 17); |
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365 |
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366 switch (rcode) { |
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367 case 0: |
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368 return; /* successful return, devl populated */ |
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369 case 1: |
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370 SYSLOG0(" ftw() encountered problem\n"); |
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371 break; |
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372 case -1: |
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373 SYSLOG1(" ftw() failed, %s\n", strerror(errno)); |
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374 break; |
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375 default: |
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376 SYSLOG1(" ftw() unexpected return, rcode=%d\n", rcode); |
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377 break; |
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378 } |
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379 exit(1); |
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380 } |
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381 |
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382 /* |
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383 * gdev() puts device names and ID into the devl structure for character |
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384 * special files in /dev. The "/dev/" string is stripped from the name |
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385 * and if the resulting pathname exceeds DNSIZE in length then the highest |
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386 * level directory names are stripped until the pathname is DNSIZE or less. |
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387 */ |
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388 int |
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389 gdev(objptr, statp, numb) |
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390 char *objptr; |
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391 struct stat *statp; |
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392 int numb; |
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393 { |
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394 int i; |
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395 int leng, start; |
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396 static struct devl ldevl[2]; |
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397 static int lndev, consflg; |
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398 |
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399 switch (numb) { |
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400 |
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401 case FTW_F: |
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402 if ((statp->st_mode & S_IFMT) == S_IFCHR) { |
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403 /* Get more and be ready for syscon & systty. */ |
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404 while (ndev + lndev >= maxdev) { |
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405 maxdev += UDQ; |
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406 devl = (struct devl *) ((devl == NULL) ? |
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407 malloc(sizeof (struct devl) * maxdev) : |
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408 realloc(devl, sizeof (struct devl) * maxdev)); |
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409 if (devl == NULL) { |
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410 SYSLOG1(" not enough memory for %d devices\n", maxdev); |
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411 exit(1); |
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412 } |
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413 } |
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414 /* |
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415 * Save systty & syscon entries if the console |
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416 * entry hasn't been seen. |
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417 */ |
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418 if (!consflg && (strcmp("/dev/systty", objptr) == 0 || |
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419 strcmp("/dev/syscon", objptr) == 0)) { |
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420 (void) strncpy(ldevl[lndev].dname, &objptr[5], DNSIZE); |
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421 ldevl[lndev].dev = statp->st_rdev; |
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422 lndev++; |
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423 return (0); |
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424 } |
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425 |
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426 leng = strlen(objptr); |
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427 /* Strip off /dev/ */ |
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428 if (leng < DNSIZE + 4) |
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429 (void) strcpy(devl[ndev].dname, &objptr[5]); |
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430 else { |
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431 start = leng - DNSIZE - 1; |
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432 |
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433 for (i = start; i < leng && (objptr[i] != '/'); i++) |
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434 ; |
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435 if (i == leng) |
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436 (void) strncpy(devl[ndev].dname, |
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437 &objptr[start], DNSIZE); |
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438 else |
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439 (void) strncpy(devl[ndev].dname, |
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440 &objptr[i+1], DNSIZE); |
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441 } |
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442 devl[ndev].dev = statp->st_rdev; |
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443 ndev++; |
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444 /* |
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445 * Put systty & syscon entries in devl when console |
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446 * is found. |
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447 */ |
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448 if (strcmp("/dev/console", objptr) == 0) { |
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449 consflg++; |
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450 for (i = 0; i < lndev; i++) { |
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451 (void) strncpy(devl[ndev].dname, |
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452 ldevl[i].dname, DNSIZE); |
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453 devl[ndev].dev = ldevl[i].dev; |
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454 ndev++; |
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455 } |
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456 lndev = 0; |
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457 } |
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458 } |
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459 return (0); |
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460 |
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461 case FTW_D: |
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462 case FTW_DNR: |
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463 case FTW_NS: |
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464 return (0); |
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465 |
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466 default: |
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467 SYSLOG1(" gdev() error, %d, encountered\n", numb); |
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468 return (1); |
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469 } |
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470 } |
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471 |
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472 |
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473 void |
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474 wrdata() |
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475 { |
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476 char tmpname[MAXNAMELEN]; |
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477 char *tfname; |
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478 int fd; |
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479 |
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480 (void) umask(02); |
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481 (void) strcpy(tmpname, "/tmp/mibiisa_ps.XXXXXX"); |
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482 if ((tfname = mktemp(tmpname)) == NULL || *tfname == '\0') { |
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483 SYSLOG1(" mktemp(\"/tmp/mibiisa_ps.XXXXXX\") failed, %s\n", |
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484 strerror(errno)); |
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485 return; |
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486 } |
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487 |
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488 if ((fd = open(tfname, O_WRONLY|O_CREAT|O_EXCL, 0664)) < 0) { |
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489 SYSLOG2(" open(\"%s\") for write failed, %s\n", |
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490 tfname, strerror(errno)); |
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491 return; |
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492 } |
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493 |
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494 /* |
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495 * Make owner root, group sys. |
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496 */ |
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497 (void) chown(tfname, (uid_t)0, (gid_t)3); |
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498 |
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499 /* write /dev data */ |
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500 write_tmp_file(fd, (char *) &ndev, sizeof (ndev)); |
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501 write_tmp_file(fd, (char *)devl, ndev * sizeof (*devl)); |
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502 |
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503 (void) close(fd); |
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504 |
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505 if (rename(tfname, psfile) != 0) { |
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506 SYSLOG2(" rename(\"%s\",\"%s\") failed\n", tfname, psfile); |
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507 return; |
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508 } |
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509 } |
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510 |
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511 /* |
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512 * gettty returns the user's tty number or ? if none. |
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513 */ |
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514 char * |
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515 gettty(ip) |
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516 int *ip; /* where the search left off last time */ |
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517 { |
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518 int i; |
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519 |
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520 if (info.pr_ttydev != PRNODEV && *ip >= 0) { |
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521 for (i = *ip; i < ndev; i++) { |
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522 if (devl[i].dev == info.pr_ttydev) { |
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523 *ip = i + 1; |
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524 return (devl[i].dname); |
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525 } |
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526 } |
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527 } |
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528 *ip = -1; |
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529 return ("?"); |
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530 } |
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531 |
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532 /* |
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533 * Special read; unlinks psfile on read error. |
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534 */ |
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535 int |
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536 read_tmp_file(fd, bp, bs) |
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537 int fd; |
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538 char *bp; |
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539 unsigned int bs; |
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540 { |
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541 int rbs; |
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542 |
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543 if ((rbs = read(fd, bp, bs)) != bs) { |
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544 SYSLOG2("read_tmp_file() error on read, rbs=%d, bs=%d\n", |
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545 rbs, bs); |
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546 (void) unlink(psfile); |
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547 return (0); |
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548 } |
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549 return (1); |
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550 } |
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551 |
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552 /* |
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553 * Special write; unlinks psfile on write error. |
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554 */ |
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555 void |
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556 write_tmp_file(fd, bp, bs) |
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557 int fd; |
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558 char *bp; |
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559 unsigned bs; |
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560 { |
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561 int wbs; |
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562 |
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563 if ((wbs = write(fd, bp, bs)) != bs) { |
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564 SYSLOG2("write_tmp_file() error on write, wbs=%d, bs=%d\n", |
|
565 wbs, bs); |
|
566 (void) unlink(psfile); |
|
567 } |
|
568 } |
|
569 |
|
570 |
|
571 /* |
|
572 * Return true iff dir is a /proc directory. |
|
573 * |
|
574 * This works because of the fact that "/proc/0" and "/proc/00" are the |
|
575 * same file, namely process 0, and are not linked to each other. Ugly. |
|
576 */ |
|
577 static int |
|
578 isprocdir(dir) /* return TRUE iff dir is a PROC directory */ |
|
579 char *dir; |
|
580 { |
|
581 struct stat stat1; /* dir/0 */ |
|
582 struct stat stat2; /* dir/00 */ |
|
583 char path[200]; |
|
584 char *p; |
|
585 |
|
586 /* |
|
587 * Make a copy of the directory name without trailing '/'s |
|
588 */ |
|
589 if (dir == NULL) |
|
590 (void) strcpy(path, "."); |
|
591 else { |
|
592 (void) strncpy(path, dir, (int) sizeof (path) - 4); |
|
593 path[sizeof (path)-4] = '\0'; |
|
594 p = path + strlen(path); |
|
595 while (p > path && *--p == '/') |
|
596 *p = '\0'; |
|
597 if (*path == '\0') |
|
598 (void) strcpy(path, "."); |
|
599 } |
|
600 |
|
601 /* |
|
602 * Append "/0" to the directory path and stat() the file. |
|
603 */ |
|
604 p = path + strlen(path); |
|
605 *p++ = '/'; |
|
606 *p++ = '0'; |
|
607 *p = '\0'; |
|
608 if (stat(path, &stat1) != 0) |
|
609 return (FALSE); |
|
610 |
|
611 /* |
|
612 * Append "/00" to the directory path and stat() the file. |
|
613 */ |
|
614 *p++ = '0'; |
|
615 *p = '\0'; |
|
616 if (stat(path, &stat2) != 0) |
|
617 return (FALSE); |
|
618 |
|
619 /* |
|
620 * See if we ended up with the same file. |
|
621 */ |
|
622 if (stat1.st_dev != stat2.st_dev || stat1.st_ino != stat2.st_ino || |
|
623 stat1.st_mode != stat2.st_mode || |
|
624 stat1.st_nlink != stat2.st_nlink || |
|
625 stat1.st_uid != stat2.st_uid || stat1.st_gid != stat2.st_gid || |
|
626 stat1.st_size != stat2.st_size) |
|
627 return (FALSE); |
|
628 |
|
629 /* |
|
630 * Return TRUE iff we have a regular file with a single link. |
|
631 */ |
|
632 return ((stat1.st_mode & S_IFMT) == S_IFREG && stat1.st_nlink == 1); |
|
633 } |
|
634 |
|
635 |
|
636 /* |
|
637 * Initialize the sunProcessTable table by defining its contents and how |
|
638 * it's structured |
|
639 */ |
|
640 void initialize_table_sunProcessTable(void) { |
|
641 |
|
642 static oid sunProcessTable_oid[] = {1, 3, 6, 1, 4, 1, 42, 3, 12}; |
|
643 netsnmp_table_registration_info *table_info; |
|
644 netsnmp_handler_registration *my_handler; |
|
645 netsnmp_iterator_info *iinfo; |
|
646 |
|
647 /* create the table structure itself */ |
|
648 table_info = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info); |
|
649 iinfo = SNMP_MALLOC_TYPEDEF(netsnmp_iterator_info); |
|
650 |
|
651 /* |
|
652 * if your table is read only, it's easiest to change the |
|
653 * HANDLER_CAN_RWRITE definition below to HANDLER_CAN_RONLY |
|
654 */ |
|
655 my_handler = netsnmp_create_handler_registration("sunProcessTable", |
|
656 sunProcessTable_handler, |
|
657 sunProcessTable_oid, |
|
658 OID_LENGTH(sunProcessTable_oid), |
|
659 HANDLER_CAN_RWRITE); |
|
660 |
|
661 if (!my_handler || !table_info || !iinfo) |
|
662 return; /* mallocs failed */ |
|
663 |
|
664 /* |
|
665 * Setting up the table's definition |
|
666 */ |
|
667 netsnmp_table_helper_add_indexes(table_info, ASN_INTEGER, 0); |
|
668 |
|
669 table_info->min_column = 1; |
|
670 table_info->max_column = 11; |
|
671 |
|
672 /* iterator access routines */ |
|
673 iinfo->get_first_data_point = sunProcessTable_get_first_data_point; |
|
674 iinfo->get_next_data_point = sunProcessTable_get_next_data_point; |
|
675 |
|
676 iinfo->table_reginfo = table_info; |
|
677 |
|
678 /* |
|
679 * registering the table with the master agent |
|
680 */ |
|
681 DEBUGMSGTL(("initialize_table_sunProcessTable", |
|
682 "Registering table sunProcessTable as a table iterator\n")); |
|
683 netsnmp_register_table_iterator(my_handler, iinfo); |
|
684 } |
|
685 |
|
686 /* Initializes the sunProcesses module */ |
|
687 void init_sunProcesses(void) { |
|
688 |
|
689 (void) time(&cache_now); |
|
690 |
|
691 /* here we initialize all the tables we're planning on supporting */ |
|
692 initialize_table_sunProcessTable(); |
|
693 } |
|
694 |
|
695 /* |
|
696 * returns the first data point within the sunProcessTable table data. |
|
697 * |
|
698 * Set the my_loop_context variable to the first data point structure |
|
699 * of your choice (from which you can find the next one). This could |
|
700 * be anything from the first node in a linked list, to an integer |
|
701 * pointer containing the beginning of an array variable. |
|
702 * |
|
703 * Set the my_data_context variable to something to be returned to |
|
704 * you later that will provide you with the data to return in a given |
|
705 * row. * This could be the same pointer as what my_loop_context is |
|
706 * set to, or something different. |
|
707 * |
|
708 * The put_index_data variable contains a list of snmp variable |
|
709 * bindings, one for each index in your table. * Set the values of |
|
710 * each appropriately according to the data matching the first row |
|
711 * and return the put_index_data variable at the end of the function. |
|
712 */ |
|
713 netsnmp_variable_list * |
|
714 sunProcessTable_get_first_data_point(void **my_loop_context, |
|
715 void **my_data_context, |
|
716 netsnmp_variable_list *put_index_data, |
|
717 netsnmp_iterator_info *mydata) { |
|
718 long long_type; |
|
719 netsnmp_variable_list *vptr; |
|
720 ps_data_t *ps_ptr; |
|
721 |
|
722 get_ps_data(); |
|
723 |
|
724 ps_ptr = pstable; |
|
725 if (ps_ptr == NULL) { |
|
726 return (NULL); |
|
727 } |
|
728 |
|
729 *my_loop_context = ps_ptr; |
|
730 *my_data_context = ps_ptr; |
|
731 |
|
732 vptr = put_index_data; |
|
733 |
|
734 long_type = (long)ps_ptr[0].pid; |
|
735 snmp_set_var_value(vptr, (u_char *) &long_type, sizeof(long_type)); |
|
736 |
|
737 /* vptr = vptr->next_variable; */ |
|
738 /* |
|
739 pr_ps(); |
|
740 */ |
|
741 return (put_index_data); |
|
742 } |
|
743 |
|
744 /* |
|
745 * functionally the same as sunProcessTable_get_first_data_point, but |
|
746 * my_loop_context has already been set to a previous value and should |
|
747 * be updated to the next in the list. For example, if it was a |
|
748 * linked list, you might want to cast it and the return |
|
749 * my_loop_context->next. The my_data_context pointer should be set |
|
750 * to something you need later and the indexes in put_index_data |
|
751 * updated again. |
|
752 */ |
|
753 |
|
754 netsnmp_variable_list * |
|
755 sunProcessTable_get_next_data_point(void **my_loop_context, |
|
756 void **my_data_context, |
|
757 netsnmp_variable_list *put_index_data, |
|
758 netsnmp_iterator_info *mydata) |
|
759 { |
|
760 long long_type; |
|
761 netsnmp_variable_list *vptr; |
|
762 ps_data_t *ps_ptr; |
|
763 |
|
764 get_ps_data(); |
|
765 |
|
766 ps_ptr = (ps_data_t *) (*my_loop_context); |
|
767 ps_ptr++; |
|
768 |
|
769 if (ps_ptr > &(pstable[pstable_lines - 1])) { |
|
770 return (NULL); |
|
771 } |
|
772 |
|
773 *my_loop_context = ps_ptr; |
|
774 *my_data_context = ps_ptr; |
|
775 |
|
776 vptr = put_index_data; |
|
777 |
|
778 long_type = (long)ps_ptr[0].pid; |
|
779 snmp_set_var_value(vptr, (u_char *) &long_type, sizeof(long_type)); |
|
780 |
|
781 /* vptr = vptr->next_variable; */ |
|
782 |
|
783 return (put_index_data); |
|
784 } |
|
785 |
|
786 /* |
|
787 * handles requests for the sunProcessTable table, |
|
788 * if anything else needs to be done |
|
789 */ |
|
790 int sunProcessTable_handler(netsnmp_mib_handler *handler, |
|
791 netsnmp_handler_registration *reginfo, |
|
792 netsnmp_agent_request_info *reqinfo, |
|
793 netsnmp_request_info *requests) { |
|
794 |
|
795 long long_type; |
|
796 netsnmp_request_info *request; |
|
797 netsnmp_table_request_info *table_info; |
|
798 netsnmp_variable_list *var; |
|
799 ps_data_t *psp; |
|
800 |
|
801 /* For caching purposes, find out what the time is now */ |
|
802 (void) time(&cache_now); |
|
803 |
|
804 for (request = requests; request; request = request->next) { |
|
805 var = request->requestvb; |
|
806 if (request->processed != 0) |
|
807 continue; |
|
808 |
|
809 /* perform anything here that you need to do before each */ |
|
810 /* request is processed. */ |
|
811 |
|
812 /* the following extracts the my_data_context pointer set in */ |
|
813 /* the loop functions above. You can then use the results to */ |
|
814 /* help return data for the columns of the sunProcessTable */ |
|
815 /* table in question */ |
|
816 psp = (ps_data_t *) netsnmp_extract_iterator_context(request); |
|
817 if (psp == NULL) { |
|
818 if (reqinfo->mode == MODE_GET || |
|
819 reqinfo->mode == MODE_SET_RESERVE1) { |
|
820 |
|
821 netsnmp_set_request_error(reqinfo, request, |
|
822 SNMP_NOSUCHINSTANCE); |
|
823 continue; |
|
824 } |
|
825 /* |
|
826 * XXX: no row existed, if you support creation and this is a |
|
827 * set, start dealing with it here, else continue |
|
828 */ |
|
829 } |
|
830 |
|
831 /* extracts the information about the table from the request */ |
|
832 table_info = netsnmp_extract_table_info(request); |
|
833 |
|
834 /* table_info->colnum contains the column number requested */ |
|
835 /* table_info->indexes contains a linked list of snmp variable */ |
|
836 /* bindings for the indexes of the table. Values in the list */ |
|
837 /* have been set corresponding to the indexes of the request */ |
|
838 if (table_info == NULL) { |
|
839 continue; |
|
840 } |
|
841 |
|
842 switch (reqinfo->mode) { |
|
843 /* |
|
844 * the table_iterator helper should change all GETNEXTs |
|
845 * into GETs for you automatically, so you don't have to |
|
846 * worry about the GETNEXT case. Only GETs and SETs need |
|
847 * to be dealt with here |
|
848 */ |
|
849 case MODE_GET: |
|
850 switch (table_info->colnum) { |
|
851 case COLUMN_PSPROCESSID: |
|
852 long_type = (long)psp->pid; |
|
853 snmp_set_var_typed_value(var, ASN_INTEGER, |
|
854 (u_char *) &long_type, |
|
855 sizeof (long_type)); |
|
856 break; |
|
857 |
|
858 case COLUMN_PSPARENTPROCESSID: |
|
859 long_type = (long)psp->ppid; |
|
860 snmp_set_var_typed_value(var, ASN_INTEGER, |
|
861 (u_char *) &long_type, |
|
862 sizeof (long_type)); |
|
863 break; |
|
864 |
|
865 case COLUMN_PSPROCESSSIZE: |
|
866 long_type = (long)psp->sz; |
|
867 snmp_set_var_typed_value(var, ASN_INTEGER, |
|
868 (u_char *) &long_type, |
|
869 sizeof (long_type)); |
|
870 break; |
|
871 |
|
872 case COLUMN_PSPROCESSCPUTIME: |
|
873 long_type = (long)psp->cpu; |
|
874 snmp_set_var_typed_value(var, ASN_INTEGER, |
|
875 (u_char *) &long_type, |
|
876 sizeof (long_type)); |
|
877 break; |
|
878 |
|
879 case COLUMN_PSPROCESSSTATE: |
|
880 snmp_set_var_typed_value(var, ASN_OCTET_STR, |
|
881 (u_char *) &psp->stat, |
|
882 strlen(psp->stat)); |
|
883 break; |
|
884 |
|
885 case COLUMN_PSPROCESSWAITCHANNEL: |
|
886 snmp_set_var_typed_value(var, ASN_OCTET_STR, |
|
887 (u_char *) &psp->wchan, |
|
888 strlen(psp->wchan)); |
|
889 break; |
|
890 |
|
891 case COLUMN_PSPROCESSTTY: |
|
892 snmp_set_var_typed_value(var, ASN_OCTET_STR, |
|
893 (u_char *) &psp->tty, |
|
894 strlen(psp->tty)); |
|
895 break; |
|
896 |
|
897 case COLUMN_PSPROCESSUSERNAME: |
|
898 snmp_set_var_typed_value(var, ASN_OCTET_STR, |
|
899 (u_char *) &psp->usrname, |
|
900 strlen(psp->usrname)); |
|
901 break; |
|
902 |
|
903 case COLUMN_PSPROCESSUSERID: |
|
904 long_type = (long)psp->uid; |
|
905 snmp_set_var_typed_value(var, ASN_INTEGER, |
|
906 (u_char *) &long_type, |
|
907 sizeof (long_type)); |
|
908 break; |
|
909 |
|
910 case COLUMN_PSPROCESSNAME: |
|
911 snmp_set_var_typed_value(var, ASN_OCTET_STR, |
|
912 (u_char *) &psp->cmd, |
|
913 strlen(psp->cmd)); |
|
914 break; |
|
915 |
|
916 case COLUMN_PSPROCESSSTATUS: |
|
917 long_type = (long)psp->sz; |
|
918 snmp_set_var_typed_value(var, ASN_INTEGER, |
|
919 (u_char *) &long_type, |
|
920 sizeof (long_type)); |
|
921 break; |
|
922 |
|
923 default: |
|
924 /* We shouldn't get here */ |
|
925 snmp_log(LOG_ERR, |
|
926 "problem encountered in sunProcessTable_handler: unknown column\n"); |
|
927 } |
|
928 break; |
|
929 |
|
930 case MODE_SET_RESERVE1: |
|
931 break; |
|
932 |
|
933 case MODE_SET_RESERVE2: |
|
934 break; |
|
935 |
|
936 case MODE_SET_FREE: |
|
937 break; |
|
938 |
|
939 case MODE_SET_ACTION: |
|
940 /* set handling... */ |
|
941 /* XXX don't know about 64 bit */ |
|
942 if ((int) *(requests->requestvb->val.integer) != 0) { |
|
943 (void) kill(psp->pid, |
|
944 (int)*(requests->requestvb->val.integer)); |
|
945 } |
|
946 break; |
|
947 |
|
948 case MODE_SET_COMMIT: |
|
949 break; |
|
950 |
|
951 case MODE_SET_UNDO: |
|
952 break; |
|
953 |
|
954 default: |
|
955 snmp_log(LOG_ERR, |
|
956 "problem encountered in sunProcessTable_handler: unsupported mode\n"); |
|
957 } |
|
958 } |
|
959 |
|
960 return (SNMP_ERR_NOERROR); |
|
961 } |