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/*
* Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
*/
#include <sm/gen.h>
SM_RCSID("@(#)$Sendmail: config.c,v 1.19 2001/09/04 22:41:27 ca Exp $")
#include <stdlib.h>
#include <sm/heap.h>
#include <sm/string.h>
#include <sm/conf.h>
/*
** PUTENV -- emulation of putenv() in terms of setenv()
**
** Not needed on Posix-compliant systems.
** This doesn't have full Posix semantics, but it's good enough
** for sendmail.
**
** Parameter:
** env -- the environment to put.
**
** Returns:
** 0 on success, < 0 on failure.
*/
#if NEEDPUTENV
# if NEEDPUTENV == 2 /* no setenv(3) call available */
int
putenv(str)
char *str;
{
char **current;
int matchlen, envlen = 0;
char *tmp;
char **newenv;
static bool first = true;
extern char **environ;
/*
** find out how much of str to match when searching
** for a string to replace.
*/
if ((tmp = strchr(str, '=')) == NULL || tmp == str)
matchlen = strlen(str);
else
matchlen = (int) (tmp - str);
++matchlen;
/*
** Search for an existing string in the environment and find the
** length of environ. If found, replace and exit.
*/
for (current = environ; *current != NULL; current++)
{
++envlen;
if (strncmp(str, *current, matchlen) == 0)
{
/* found it, now insert the new version */
*current = (char *) str;
return 0;
}
}
/*
** There wasn't already a slot so add space for a new slot.
** If this is our first time through, use malloc(), else realloc().
*/
if (first)
{
newenv = (char **) sm_malloc(sizeof(char *) * (envlen + 2));
if (newenv == NULL)
return -1;
first = false;
(void) memcpy(newenv, environ, sizeof(char *) * envlen);
}
else
{
newenv = (char **) sm_realloc((char *) environ,
sizeof(char *) * (envlen + 2));
if (newenv == NULL)
return -1;
}
/* actually add in the new entry */
environ = newenv;
environ[envlen] = (char *) str;
environ[envlen + 1] = NULL;
return 0;
}
# else /* NEEDPUTENV == 2 */
int
putenv(env)
char *env;
{
char *p;
int l;
char nbuf[100];
p = strchr(env, '=');
if (p == NULL)
return 0;
l = p - env;
if (l > sizeof nbuf - 1)
l = sizeof nbuf - 1;
memmove(nbuf, env, l);
nbuf[l] = '\0';
return setenv(nbuf, ++p, 1);
}
# endif /* NEEDPUTENV == 2 */
#endif /* NEEDPUTENV */
/*
** UNSETENV -- remove a variable from the environment
**
** Not needed on newer systems.
**
** Parameters:
** name -- the string name of the environment variable to be
** deleted from the current environment.
**
** Returns:
** none.
**
** Globals:
** environ -- a pointer to the current environment.
**
** Side Effects:
** Modifies environ.
*/
#if !HASUNSETENV
void
unsetenv(name)
char *name;
{
extern char **environ;
register char **pp;
int len = strlen(name);
for (pp = environ; *pp != NULL; pp++)
{
if (strncmp(name, *pp, len) == 0 &&
((*pp)[len] == '=' || (*pp)[len] == '\0'))
break;
}
for (; *pp != NULL; pp++)
*pp = pp[1];
}
#endif /* !HASUNSETENV */
char *SmCompileOptions[] =
{
#if SM_CONF_BROKEN_STRTOD
"SM_CONF_BROKEN_STRTOD",
#endif /* SM_CONF_BROKEN_STRTOD */
#if SM_CONF_GETOPT
"SM_CONF_GETOPT",
#endif /* SM_CONF_GETOPT */
#if SM_CONF_LONGLONG
"SM_CONF_LONGLONG",
#endif /* SM_CONF_LONGLONG */
#if SM_CONF_MEMCHR
"SM_CONF_MEMCHR",
#endif /* SM_CONF_MEMCHR */
#if SM_CONF_MSG
"SM_CONF_MSG",
#endif /* SM_CONF_MSG */
#if SM_CONF_QUAD_T
"SM_CONF_QUAD_T",
#endif /* SM_CONF_QUAD_T */
#if SM_CONF_SEM
"SM_CONF_SEM",
#endif /* SM_CONF_SEM */
#if SM_CONF_SETITIMER
"SM_CONF_SETITIMER",
#endif /* SM_CONF_SETITIMER */
#if SM_CONF_SHM
"SM_CONF_SHM",
#endif /* SM_CONF_SHM */
#if SM_CONF_SHM_DELAY
"SM_CONF_SHM_DELAY",
#endif /* SM_CONF_SHM_DELAY */
#if SM_CONF_SSIZE_T
"SM_CONF_SSIZE_T",
#endif /* SM_CONF_SSIZE_T */
#if SM_CONF_STDBOOL_H
"SM_CONF_STDBOOL_H",
#endif /* SM_CONF_STDBOOL_H */
#if SM_CONF_STDDEF_H
"SM_CONF_STDDEF_H",
#endif /* SM_CONF_STDDEF_H */
#if 0
/* XXX this is always enabled (for now) */
#if SM_CONF_STRL
"SM_CONF_STRL",
#endif /* SM_CONF_STRL */
#endif /* 0 */
#if SM_CONF_SYS_CDEFS_H
"SM_CONF_SYS_CDEFS_H",
#endif /* SM_CONF_SYS_CDEFS_H */
#if SM_CONF_SYSEXITS_H
"SM_CONF_SYSEXITS_H",
#endif /* SM_CONF_SYSEXITS_H */
#if SM_CONF_UID_GID
"SM_CONF_UID_GID",
#endif /* SM_CONF_UID_GID */
#if SM_HEAP_CHECK
"SM_HEAP_CHECK",
#endif /* SM_HEAP_CHECK */
#if defined(SM_OS_NAME) && defined(__STDC__)
"SM_OS=sm_os_" SM_OS_NAME,
#endif /* defined(SM_OS_NAME) && defined(__STDC__) */
#if SM_VA_STD
"SM_VA_STD",
#endif /* SM_VA_STD */
NULL
};
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