/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License, Version 1.0 only

 * (the "License").  You may not use this file except in compliance

 * with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include "synonyms.h"

#include "xpg6.h"

#include <sys/types.h>

#include <unistd.h>

#include <errno.h>

#include <string.h>

typedef struct {

	int	config_value;

	char	*value;

} config;

/*

 * keep these in the same order as in sys/unistd.h

 */

static const config	default_conf[] = {

	{ _CS_LFS_CFLAGS,	"-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" },

	{ _CS_LFS_LDFLAGS,	""					},

	{ _CS_LFS_LIBS,		""					},

	{ _CS_LFS_LINTFLAGS,	"-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" },

	{ _CS_LFS64_CFLAGS,	"-D_LARGEFILE64_SOURCE"			},

	{ _CS_LFS64_LDFLAGS,	""					},

	{ _CS_LFS64_LIBS,	""					},

	{ _CS_LFS64_LINTFLAGS,	"-D_LARGEFILE64_SOURCE"			},

	{ _CS_XBS5_ILP32_OFF32_CFLAGS,	""				},

	{ _CS_XBS5_ILP32_OFF32_LDFLAGS,	""				},

	{ _CS_XBS5_ILP32_OFF32_LIBS,	""				},

	{ _CS_XBS5_ILP32_OFF32_LINTFLAGS, ""				},

	{ _CS_XBS5_ILP32_OFFBIG_CFLAGS,

"-Xa -Usun -Usparc -Uunix -Ui386 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" },

	{ _CS_XBS5_ILP32_OFFBIG_LDFLAGS, ""				},

	{ _CS_XBS5_ILP32_OFFBIG_LIBS,	""				},

	{ _CS_XBS5_ILP32_OFFBIG_LINTFLAGS,

		"-Xa -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"},

	{ _CS_POSIX_V6_ILP32_OFF32_CFLAGS,	""			},

	{ _CS_POSIX_V6_ILP32_OFF32_LDFLAGS,	""			},

	{ _CS_POSIX_V6_ILP32_OFF32_LIBS,	""			},

	{ _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS,

"-Xa -Usun -Usparc -Uunix -Ui386 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" },

	{ _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS,	""			},

	{ _CS_POSIX_V6_ILP32_OFFBIG_LIBS,	""			},

	{ _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS,

		"POSIX_V6_ILP32_OFF32\nPOSIX_V6_ILP32_OFFBIG\n"

		"POSIX_V6_LP64_OFF64\nPOSIX_V6_LPBIG_OFFBIG"		},

	{ _CS_XBS5_LP64_OFF64_CFLAGS, "-xarch=generic64"		},

	{ _CS_XBS5_LP64_OFF64_LDFLAGS,	"-xarch=generic64"		},

	{ _CS_XBS5_LP64_OFF64_LIBS,	""				},

	{ _CS_XBS5_LP64_OFF64_LINTFLAGS, "-xarch=generic64" 		},

	{ _CS_XBS5_LPBIG_OFFBIG_CFLAGS, "-xarch=generic64" 		},

	{ _CS_XBS5_LPBIG_OFFBIG_LDFLAGS, "-xarch=generic64"		},

	{ _CS_XBS5_LPBIG_OFFBIG_LIBS,	""				},

	{ _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS, "-xarch=generic64"		},

	{ _CS_POSIX_V6_LP64_OFF64_CFLAGS, "-xarch=generic64"		},

	{ _CS_POSIX_V6_LP64_OFF64_LDFLAGS, "-xarch=generic64"		},

	{ _CS_POSIX_V6_LP64_OFF64_LIBS,	""				},

	{ _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS, "-xarch=generic64" 		},

	{ _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS, "-xarch=generic64"		},

	{ _CS_POSIX_V6_LPBIG_OFFBIG_LIBS, ""				},

};

#define	CS_ENTRY_COUNT (sizeof (default_conf) / sizeof (config))

size_t

confstr(int name, char *buf, size_t length)

{

	size_t			conf_length;

	config			*entry;

	int			i;

	char			*path;

	/* Keep _CS_PATH in sync with execvp.c */

	if (name == _CS_PATH) {

		if (__xpg6 & _C99SUSv3_XPG6_sysconf_version)

		    path = "/usr/xpg6/bin:/usr/xpg4/bin:/usr/ccs/bin:"\

				"/usr/bin:/opt/SUNWspro/bin";

		else

		    path = "/usr/xpg4/bin:/usr/ccs/bin:/usr/bin:"\

				"/opt/SUNWspro/bin";

		conf_length = strlen(path) + 1;

		if (length != 0) {

			(void) strncpy(buf, path, length);

			buf[length - 1] = '\0';

		}

		return (conf_length);

	}

	/*

	 * Make sure others are known configuration parameters

	 */

	entry = (config *)default_conf;

	for (i = 0; i < CS_ENTRY_COUNT; i++) {

		if (name == entry->config_value) {

			/*

			 * Copy out the parameter from our tables.

			 */

			conf_length = strlen(entry->value) + 1;

			if (length != 0) {

				(void) strncpy(buf, entry->value, length);

				buf[length - 1] = '\0';

			}

			return (conf_length);

		}

		entry++;

	}

	/* If the entry was not found in table return an error */

	errno = EINVAL;

	return ((size_t)0);

}