xref: /illumos-gate/usr/src/cmd/sendmail/libsm/config.c (revision 4aac33d3)
17c478bd9Sstevel@tonic-gate /*
2*4aac33d3Sjbeck  * Copyright (c) 2000-2003, 2007 Sendmail, Inc. and its suppliers.
37c478bd9Sstevel@tonic-gate  *	All rights reserved.
47c478bd9Sstevel@tonic-gate  *
57c478bd9Sstevel@tonic-gate  * By using this file, you agree to the terms and conditions set
67c478bd9Sstevel@tonic-gate  * forth in the LICENSE file which can be found at the top level of
77c478bd9Sstevel@tonic-gate  * the sendmail distribution.
87c478bd9Sstevel@tonic-gate  *
97c478bd9Sstevel@tonic-gate  */
107c478bd9Sstevel@tonic-gate 
117c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
127c478bd9Sstevel@tonic-gate 
137c478bd9Sstevel@tonic-gate #include <sm/gen.h>
14*4aac33d3Sjbeck SM_RCSID("@(#)$Id: config.c,v 1.31 2007/03/14 21:21:49 ca Exp $")
157c478bd9Sstevel@tonic-gate 
167c478bd9Sstevel@tonic-gate #include <stdlib.h>
177c478bd9Sstevel@tonic-gate #include <sm/heap.h>
187c478bd9Sstevel@tonic-gate #include <sm/string.h>
197c478bd9Sstevel@tonic-gate #include <sm/conf.h>
207c478bd9Sstevel@tonic-gate 
217c478bd9Sstevel@tonic-gate /*
227c478bd9Sstevel@tonic-gate **  PUTENV -- emulation of putenv() in terms of setenv()
237c478bd9Sstevel@tonic-gate **
247c478bd9Sstevel@tonic-gate **	Not needed on Posix-compliant systems.
257c478bd9Sstevel@tonic-gate **	This doesn't have full Posix semantics, but it's good enough
267c478bd9Sstevel@tonic-gate **		for sendmail.
277c478bd9Sstevel@tonic-gate **
287c478bd9Sstevel@tonic-gate **	Parameter:
297c478bd9Sstevel@tonic-gate **		env -- the environment to put.
307c478bd9Sstevel@tonic-gate **
317c478bd9Sstevel@tonic-gate **	Returns:
327c478bd9Sstevel@tonic-gate **		0 on success, < 0 on failure.
337c478bd9Sstevel@tonic-gate */
347c478bd9Sstevel@tonic-gate 
357c478bd9Sstevel@tonic-gate #if NEEDPUTENV
367c478bd9Sstevel@tonic-gate 
377c478bd9Sstevel@tonic-gate # if NEEDPUTENV == 2		/* no setenv(3) call available */
387c478bd9Sstevel@tonic-gate 
397c478bd9Sstevel@tonic-gate int
407c478bd9Sstevel@tonic-gate putenv(str)
417c478bd9Sstevel@tonic-gate 	char *str;
427c478bd9Sstevel@tonic-gate {
437c478bd9Sstevel@tonic-gate 	char **current;
447c478bd9Sstevel@tonic-gate 	int matchlen, envlen = 0;
457c478bd9Sstevel@tonic-gate 	char *tmp;
467c478bd9Sstevel@tonic-gate 	char **newenv;
477c478bd9Sstevel@tonic-gate 	static bool first = true;
487c478bd9Sstevel@tonic-gate 	extern char **environ;
497c478bd9Sstevel@tonic-gate 
507c478bd9Sstevel@tonic-gate 	/*
517c478bd9Sstevel@tonic-gate 	**  find out how much of str to match when searching
527c478bd9Sstevel@tonic-gate 	**  for a string to replace.
537c478bd9Sstevel@tonic-gate 	*/
547c478bd9Sstevel@tonic-gate 
557c478bd9Sstevel@tonic-gate 	if ((tmp = strchr(str, '=')) == NULL || tmp == str)
567c478bd9Sstevel@tonic-gate 		matchlen = strlen(str);
577c478bd9Sstevel@tonic-gate 	else
587c478bd9Sstevel@tonic-gate 		matchlen = (int) (tmp - str);
597c478bd9Sstevel@tonic-gate 	++matchlen;
607c478bd9Sstevel@tonic-gate 
617c478bd9Sstevel@tonic-gate 	/*
627c478bd9Sstevel@tonic-gate 	**  Search for an existing string in the environment and find the
637c478bd9Sstevel@tonic-gate 	**  length of environ.  If found, replace and exit.
647c478bd9Sstevel@tonic-gate 	*/
657c478bd9Sstevel@tonic-gate 
667c478bd9Sstevel@tonic-gate 	for (current = environ; *current != NULL; current++)
677c478bd9Sstevel@tonic-gate 	{
687c478bd9Sstevel@tonic-gate 		++envlen;
697c478bd9Sstevel@tonic-gate 
707c478bd9Sstevel@tonic-gate 		if (strncmp(str, *current, matchlen) == 0)
717c478bd9Sstevel@tonic-gate 		{
727c478bd9Sstevel@tonic-gate 			/* found it, now insert the new version */
737c478bd9Sstevel@tonic-gate 			*current = (char *) str;
747c478bd9Sstevel@tonic-gate 			return 0;
757c478bd9Sstevel@tonic-gate 		}
767c478bd9Sstevel@tonic-gate 	}
777c478bd9Sstevel@tonic-gate 
787c478bd9Sstevel@tonic-gate 	/*
797c478bd9Sstevel@tonic-gate 	**  There wasn't already a slot so add space for a new slot.
807c478bd9Sstevel@tonic-gate 	**  If this is our first time through, use malloc(), else realloc().
817c478bd9Sstevel@tonic-gate 	*/
827c478bd9Sstevel@tonic-gate 
837c478bd9Sstevel@tonic-gate 	if (first)
847c478bd9Sstevel@tonic-gate 	{
857c478bd9Sstevel@tonic-gate 		newenv = (char **) sm_malloc(sizeof(char *) * (envlen + 2));
867c478bd9Sstevel@tonic-gate 		if (newenv == NULL)
877c478bd9Sstevel@tonic-gate 			return -1;
887c478bd9Sstevel@tonic-gate 
897c478bd9Sstevel@tonic-gate 		first = false;
907c478bd9Sstevel@tonic-gate 		(void) memcpy(newenv, environ, sizeof(char *) * envlen);
917c478bd9Sstevel@tonic-gate 	}
927c478bd9Sstevel@tonic-gate 	else
937c478bd9Sstevel@tonic-gate 	{
947c478bd9Sstevel@tonic-gate 		newenv = (char **) sm_realloc((char *) environ,
957c478bd9Sstevel@tonic-gate 					      sizeof(char *) * (envlen + 2));
967c478bd9Sstevel@tonic-gate 		if (newenv == NULL)
977c478bd9Sstevel@tonic-gate 			return -1;
987c478bd9Sstevel@tonic-gate 	}
997c478bd9Sstevel@tonic-gate 
1007c478bd9Sstevel@tonic-gate 	/* actually add in the new entry */
1017c478bd9Sstevel@tonic-gate 	environ = newenv;
1027c478bd9Sstevel@tonic-gate 	environ[envlen] = (char *) str;
1037c478bd9Sstevel@tonic-gate 	environ[envlen + 1] = NULL;
1047c478bd9Sstevel@tonic-gate 
1057c478bd9Sstevel@tonic-gate 	return 0;
1067c478bd9Sstevel@tonic-gate }
1077c478bd9Sstevel@tonic-gate 
1087c478bd9Sstevel@tonic-gate # else /* NEEDPUTENV == 2 */
1097c478bd9Sstevel@tonic-gate 
1107c478bd9Sstevel@tonic-gate int
1117c478bd9Sstevel@tonic-gate putenv(env)
1127c478bd9Sstevel@tonic-gate 	char *env;
1137c478bd9Sstevel@tonic-gate {
1147c478bd9Sstevel@tonic-gate 	char *p;
1157c478bd9Sstevel@tonic-gate 	int l;
1167c478bd9Sstevel@tonic-gate 	char nbuf[100];
1177c478bd9Sstevel@tonic-gate 
1187c478bd9Sstevel@tonic-gate 	p = strchr(env, '=');
1197c478bd9Sstevel@tonic-gate 	if (p == NULL)
1207c478bd9Sstevel@tonic-gate 		return 0;
1217c478bd9Sstevel@tonic-gate 	l = p - env;
1227c478bd9Sstevel@tonic-gate 	if (l > sizeof nbuf - 1)
1237c478bd9Sstevel@tonic-gate 		l = sizeof nbuf - 1;
1247c478bd9Sstevel@tonic-gate 	memmove(nbuf, env, l);
1257c478bd9Sstevel@tonic-gate 	nbuf[l] = '\0';
1267c478bd9Sstevel@tonic-gate 	return setenv(nbuf, ++p, 1);
1277c478bd9Sstevel@tonic-gate }
1287c478bd9Sstevel@tonic-gate 
1297c478bd9Sstevel@tonic-gate # endif /* NEEDPUTENV == 2 */
1307c478bd9Sstevel@tonic-gate #endif /* NEEDPUTENV */
1317c478bd9Sstevel@tonic-gate /*
1327c478bd9Sstevel@tonic-gate **  UNSETENV -- remove a variable from the environment
1337c478bd9Sstevel@tonic-gate **
1347c478bd9Sstevel@tonic-gate **	Not needed on newer systems.
1357c478bd9Sstevel@tonic-gate **
1367c478bd9Sstevel@tonic-gate **	Parameters:
1377c478bd9Sstevel@tonic-gate **		name -- the string name of the environment variable to be
1387c478bd9Sstevel@tonic-gate **			deleted from the current environment.
1397c478bd9Sstevel@tonic-gate **
1407c478bd9Sstevel@tonic-gate **	Returns:
1417c478bd9Sstevel@tonic-gate **		none.
1427c478bd9Sstevel@tonic-gate **
1437c478bd9Sstevel@tonic-gate **	Globals:
1447c478bd9Sstevel@tonic-gate **		environ -- a pointer to the current environment.
1457c478bd9Sstevel@tonic-gate **
1467c478bd9Sstevel@tonic-gate **	Side Effects:
1477c478bd9Sstevel@tonic-gate **		Modifies environ.
1487c478bd9Sstevel@tonic-gate */
1497c478bd9Sstevel@tonic-gate 
1507c478bd9Sstevel@tonic-gate #if !HASUNSETENV
1517c478bd9Sstevel@tonic-gate 
1527c478bd9Sstevel@tonic-gate void
unsetenv(name)1537c478bd9Sstevel@tonic-gate unsetenv(name)
1547c478bd9Sstevel@tonic-gate 	char *name;
1557c478bd9Sstevel@tonic-gate {
1567c478bd9Sstevel@tonic-gate 	extern char **environ;
1577c478bd9Sstevel@tonic-gate 	register char **pp;
1587c478bd9Sstevel@tonic-gate 	int len = strlen(name);
1597c478bd9Sstevel@tonic-gate 
1607c478bd9Sstevel@tonic-gate 	for (pp = environ; *pp != NULL; pp++)
1617c478bd9Sstevel@tonic-gate 	{
1627c478bd9Sstevel@tonic-gate 		if (strncmp(name, *pp, len) == 0 &&
1637c478bd9Sstevel@tonic-gate 		    ((*pp)[len] == '=' || (*pp)[len] == '\0'))
1647c478bd9Sstevel@tonic-gate 			break;
1657c478bd9Sstevel@tonic-gate 	}
1667c478bd9Sstevel@tonic-gate 
1677c478bd9Sstevel@tonic-gate 	for (; *pp != NULL; pp++)
1687c478bd9Sstevel@tonic-gate 		*pp = pp[1];
1697c478bd9Sstevel@tonic-gate }
1707c478bd9Sstevel@tonic-gate 
1717c478bd9Sstevel@tonic-gate #endif /* !HASUNSETENV */
1727c478bd9Sstevel@tonic-gate 
1737c478bd9Sstevel@tonic-gate char *SmCompileOptions[] =
1747c478bd9Sstevel@tonic-gate {
1757c478bd9Sstevel@tonic-gate #if SM_CONF_BROKEN_STRTOD
1767c478bd9Sstevel@tonic-gate 	"SM_CONF_BROKEN_STRTOD",
1777c478bd9Sstevel@tonic-gate #endif /* SM_CONF_BROKEN_STRTOD */
1787c478bd9Sstevel@tonic-gate #if SM_CONF_GETOPT
1797c478bd9Sstevel@tonic-gate 	"SM_CONF_GETOPT",
1807c478bd9Sstevel@tonic-gate #endif /* SM_CONF_GETOPT */
1817c478bd9Sstevel@tonic-gate #if SM_CONF_LDAP_INITIALIZE
1827c478bd9Sstevel@tonic-gate 	"SM_CONF_LDAP_INITIALIZE",
1837c478bd9Sstevel@tonic-gate #endif /* SM_CONF_LDAP_INITIALIZE */
1847c478bd9Sstevel@tonic-gate #if SM_CONF_LDAP_MEMFREE
1857c478bd9Sstevel@tonic-gate 	"SM_CONF_LDAP_MEMFREE",
1867c478bd9Sstevel@tonic-gate #endif /* SM_CONF_LDAP_MEMFREE */
1877c478bd9Sstevel@tonic-gate #if SM_CONF_LONGLONG
1887c478bd9Sstevel@tonic-gate 	"SM_CONF_LONGLONG",
1897c478bd9Sstevel@tonic-gate #endif /* SM_CONF_LONGLONG */
1907c478bd9Sstevel@tonic-gate #if SM_CONF_MEMCHR
1917c478bd9Sstevel@tonic-gate 	"SM_CONF_MEMCHR",
1927c478bd9Sstevel@tonic-gate #endif /* SM_CONF_MEMCHR */
1937c478bd9Sstevel@tonic-gate #if SM_CONF_MSG
1947c478bd9Sstevel@tonic-gate 	"SM_CONF_MSG",
1957c478bd9Sstevel@tonic-gate #endif /* SM_CONF_MSG */
1967c478bd9Sstevel@tonic-gate #if SM_CONF_QUAD_T
1977c478bd9Sstevel@tonic-gate 	"SM_CONF_QUAD_T",
1987c478bd9Sstevel@tonic-gate #endif /* SM_CONF_QUAD_T */
1997c478bd9Sstevel@tonic-gate #if SM_CONF_SEM
2007c478bd9Sstevel@tonic-gate 	"SM_CONF_SEM",
2017c478bd9Sstevel@tonic-gate #endif /* SM_CONF_SEM */
2027c478bd9Sstevel@tonic-gate #if SM_CONF_SETITIMER
2037c478bd9Sstevel@tonic-gate 	"SM_CONF_SETITIMER",
2047c478bd9Sstevel@tonic-gate #endif /* SM_CONF_SETITIMER */
2057c478bd9Sstevel@tonic-gate #if SM_CONF_SIGSETJMP
2067c478bd9Sstevel@tonic-gate 	"SM_CONF_SIGSETJMP",
2077c478bd9Sstevel@tonic-gate #endif /* SM_CONF_SIGSETJMP */
2087c478bd9Sstevel@tonic-gate #if SM_CONF_SHM
2097c478bd9Sstevel@tonic-gate 	"SM_CONF_SHM",
2107c478bd9Sstevel@tonic-gate #endif /* SM_CONF_SHM */
2117c478bd9Sstevel@tonic-gate #if SM_CONF_SHM_DELAY
2127c478bd9Sstevel@tonic-gate 	"SM_CONF_SHM_DELAY",
2137c478bd9Sstevel@tonic-gate #endif /* SM_CONF_SHM_DELAY */
2147c478bd9Sstevel@tonic-gate #if SM_CONF_SSIZE_T
2157c478bd9Sstevel@tonic-gate 	"SM_CONF_SSIZE_T",
2167c478bd9Sstevel@tonic-gate #endif /* SM_CONF_SSIZE_T */
2177c478bd9Sstevel@tonic-gate #if SM_CONF_STDBOOL_H
2187c478bd9Sstevel@tonic-gate 	"SM_CONF_STDBOOL_H",
2197c478bd9Sstevel@tonic-gate #endif /* SM_CONF_STDBOOL_H */
2207c478bd9Sstevel@tonic-gate #if SM_CONF_STDDEF_H
2217c478bd9Sstevel@tonic-gate 	"SM_CONF_STDDEF_H",
2227c478bd9Sstevel@tonic-gate #endif /* SM_CONF_STDDEF_H */
2237c478bd9Sstevel@tonic-gate 
2247c478bd9Sstevel@tonic-gate #if 0
2257c478bd9Sstevel@tonic-gate /* XXX this is always enabled (for now) */
2267c478bd9Sstevel@tonic-gate #if SM_CONF_STRL
2277c478bd9Sstevel@tonic-gate 	"SM_CONF_STRL",
2287c478bd9Sstevel@tonic-gate #endif /* SM_CONF_STRL */
2297c478bd9Sstevel@tonic-gate #endif /* 0 */
2307c478bd9Sstevel@tonic-gate 
2317c478bd9Sstevel@tonic-gate #if SM_CONF_SYS_CDEFS_H
2327c478bd9Sstevel@tonic-gate 	"SM_CONF_SYS_CDEFS_H",
2337c478bd9Sstevel@tonic-gate #endif /* SM_CONF_SYS_CDEFS_H */
2347c478bd9Sstevel@tonic-gate #if SM_CONF_SYSEXITS_H
2357c478bd9Sstevel@tonic-gate 	"SM_CONF_SYSEXITS_H",
2367c478bd9Sstevel@tonic-gate #endif /* SM_CONF_SYSEXITS_H */
2377c478bd9Sstevel@tonic-gate #if SM_CONF_UID_GID
2387c478bd9Sstevel@tonic-gate 	"SM_CONF_UID_GID",
2397c478bd9Sstevel@tonic-gate #endif /* SM_CONF_UID_GID */
2407c478bd9Sstevel@tonic-gate #if DO_NOT_USE_STRCPY
2417c478bd9Sstevel@tonic-gate 	"DO_NOT_USE_STRCPY",
2427c478bd9Sstevel@tonic-gate #endif /* DO_NOT_USE_STRCPY */
2437c478bd9Sstevel@tonic-gate #if SM_HEAP_CHECK
2447c478bd9Sstevel@tonic-gate 	"SM_HEAP_CHECK",
2457c478bd9Sstevel@tonic-gate #endif /* SM_HEAP_CHECK */
2467c478bd9Sstevel@tonic-gate #if defined(SM_OS_NAME) && defined(__STDC__)
2477c478bd9Sstevel@tonic-gate 	"SM_OS=sm_os_" SM_OS_NAME,
2487c478bd9Sstevel@tonic-gate #endif /* defined(SM_OS_NAME) && defined(__STDC__) */
2497c478bd9Sstevel@tonic-gate #if SM_VA_STD
2507c478bd9Sstevel@tonic-gate 	"SM_VA_STD",
2517c478bd9Sstevel@tonic-gate #endif /* SM_VA_STD */
252*4aac33d3Sjbeck #if USEKSTAT
253*4aac33d3Sjbeck 	"USEKSTAT",
254*4aac33d3Sjbeck #endif /* USEKSTAT */
255*4aac33d3Sjbeck #if USEPROCMEMINFO
256*4aac33d3Sjbeck 	"USEPROCMEMINFO",
257*4aac33d3Sjbeck #endif /* USEPROCMEMINFO */
258*4aac33d3Sjbeck #if USESWAPCTL
259*4aac33d3Sjbeck 	"USESWAPCTL",
260*4aac33d3Sjbeck #endif /* USESWAPCTL */
2617c478bd9Sstevel@tonic-gate 	NULL
2627c478bd9Sstevel@tonic-gate };
263