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/*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <sys/syslog.h>
#if defined (HAVE_LIBECONF) && defined (USE_VENDORDIR)
#include <libeconf.h>
#endif
#include "closestream.h"
#include "shells.h"
/*
* is_known_shell() -- if the given shell appears in /etc/shells
* or vendor defined files.
* Return 1 if found and return 0 if not found.
*/
extern int is_known_shell(const char *shell_name)
{
int ret = 0;
#if defined (HAVE_LIBECONF) && defined (USE_VENDORDIR)
size_t size = 0;
econf_err error;
char **keys;
econf_file *key_file;
error = econf_readDirs(&key_file,
_PATH_VENDORDIR,
"/etc",
"shells",
NULL,
"", /* key only */
"#" /* comment */);
if (error) {
syslog(LOG_ALERT,
_("Cannot parse shells files: %s"),
econf_errString(error));
exit(EXIT_FAILURE);
}
error = econf_getKeys(key_file, NULL, &size, &keys);
if (error) {
syslog(LOG_ALERT,
_("Cannot evaluate entries in shells files: %s"),
econf_errString(error));
econf_free (key_file);
exit(EXIT_FAILURE);
}
for (size_t i = 0; i < size; i++) {
if (strcmp (keys[i], shell_name) == 0) {
ret = 1;
break;
}
}
econf_free (key_file);
#else
char *s;
if (!shell_name)
return 0;
setusershell();
while ((s = getusershell())) {
if (*s != '#' && strcmp(shell_name, s) == 0) {
ret = 1;
break;
}
}
endusershell();
#endif
return ret;
}
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