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/*
* Copyright (c) 1985, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
RCSID("$Id: getusershell.c,v 1.10 2000/05/22 09:11:59 joda Exp $");
#ifndef HAVE_GETUSERSHELL
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_USERSEC_H
struct aud_rec;
#include <usersec.h>
#endif
#ifdef HAVE_USERCONF_H
#include <userconf.h>
#endif
#ifndef _PATH_SHELLS
#define _PATH_SHELLS "/etc/shells"
#endif
#ifndef _PATH_BSHELL
#define _PATH_BSHELL "/bin/sh"
#endif
#ifndef _PATH_CSHELL
#define _PATH_CSHELL "/bin/csh"
#endif
/*
* Local shells should NOT be added here. They should be added in
* /etc/shells.
*/
static char *okshells[] = { _PATH_BSHELL, _PATH_CSHELL, NULL };
static char **curshell, **shells, *strings;
static char **initshells (void);
/*
* Get a list of shells from _PATH_SHELLS, if it exists.
*/
char *
getusershell()
{
char *ret;
if (curshell == NULL)
curshell = initshells();
ret = *curshell;
if (ret != NULL)
curshell++;
return (ret);
}
void
endusershell()
{
if (shells != NULL)
free(shells);
shells = NULL;
if (strings != NULL)
free(strings);
strings = NULL;
curshell = NULL;
}
void
setusershell()
{
curshell = initshells();
}
static char **
initshells()
{
char **sp, *cp;
#ifdef HAVE_GETCONFATTR
char *tmp;
int nsh;
#else
FILE *fp;
#endif
struct stat statb;
free(shells);
shells = NULL;
free(strings);
strings = NULL;
#ifdef HAVE_GETCONFATTR
if(getconfattr(SC_SYS_LOGIN, SC_SHELLS, &tmp, SEC_LIST) != 0)
return okshells;
for(cp = tmp, nsh = 0; *cp; cp += strlen(cp) + 1, nsh++);
shells = calloc(nsh + 1, sizeof(*shells));
if(shells == NULL)
return okshells;
strings = malloc(cp - tmp);
if(strings == NULL) {
free(shells);
shells = NULL;
return okshells;
}
memcpy(strings, tmp, cp - tmp);
for(sp = shells, cp = strings; *cp; cp += strlen(cp) + 1, sp++)
*sp = cp;
#else
if ((fp = fopen(_PATH_SHELLS, "r")) == NULL)
return (okshells);
if (fstat(fileno(fp), &statb) == -1) {
fclose(fp);
return (okshells);
}
if ((strings = malloc((u_int)statb.st_size)) == NULL) {
fclose(fp);
return (okshells);
}
shells = calloc((unsigned)statb.st_size / 3, sizeof (char *));
if (shells == NULL) {
fclose(fp);
free(strings);
strings = NULL;
return (okshells);
}
sp = shells;
cp = strings;
while (fgets(cp, MaxPathLen + 1, fp) != NULL) {
while (*cp != '#' && *cp != '/' && *cp != '\0')
cp++;
if (*cp == '#' || *cp == '\0')
continue;
*sp++ = cp;
while (!isspace(*cp) && *cp != '#' && *cp != '\0')
cp++;
*cp++ = '\0';
}
fclose(fp);
#endif
*sp = NULL;
return (shells);
}
#endif /* HAVE_GETUSERSHELL */
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