[openssh.git] / openbsd-compat / getusershell.c

/*
 * 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.
 */

#include "includes.h"
#include "getusershell.h"

#ifndef HAVE_GETUSERSHELL

#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: getusershell.c,v 1.2 1996/08/19 08:24:15 tholo Exp $";
#endif /* LIBC_SCCS and not lint */

#include <sys/file.h>
#include <ctype.h>

/*
 * 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 __P((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()
{
	register char **sp, *cp;
	register FILE *fp;
	struct stat statb;

	if (shells != NULL)
		free(shells);
	shells = NULL;
	if (strings != NULL)
		free(strings);
	strings = NULL;
	if ((fp = fopen(_PATH_SHELLS, "r")) == NULL)
		return (okshells);
	if (fstat(fileno(fp), &statb) == -1) {
		(void)fclose(fp);
		return (okshells);
	}
	if ((strings = malloc((u_int)statb.st_size)) == NULL) {
		(void)fclose(fp);
		return (okshells);
	}
	shells = calloc((unsigned)statb.st_size / 3, sizeof (char *));
	if (shells == NULL) {
		(void)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';
	}
	*sp = NULL;
	(void)fclose(fp);
	return (shells);
}

#endif /* HAVE_GETUSERSHELL */
Commit	Line	Data
7cdb79d4	1	/*
	2	* Copyright (c) 1985, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#include "includes.h"
	35	#include "getusershell.h"
	36
	37	#ifndef HAVE_GETUSERSHELL
	38
	39	#if defined(LIBC_SCCS) && !defined(lint)
	40	static char rcsid[] = "$OpenBSD: getusershell.c,v 1.2 1996/08/19 08:24:15 tholo Exp $";
	41	#endif /* LIBC_SCCS and not lint */
	42
	43	#include <sys/file.h>
	44	#include <ctype.h>
	45
	46	/*
	47	* Local shells should NOT be added here. They should be added in
	48	* /etc/shells.
	49	*/
	50
	51	static char *okshells[] = { _PATH_BSHELL, _PATH_CSHELL, NULL };
	52	static char curshell, shells, *strings;
	53	static char **initshells __P((void));
	54
	55	/*
	56	* Get a list of shells from _PATH_SHELLS, if it exists.
	57	*/
	58	char *
	59	getusershell()
	60	{
	61	char *ret;
	62
	63	if (curshell == NULL)
	64	curshell = initshells();
65	ret = *curshell;
66	if (ret != NULL)
67	curshell++;
68	return (ret);
69	}
70
71	void
72	endusershell()
73	{
74
75	if (shells != NULL)
76	free(shells);
77	shells = NULL;
78	if (strings != NULL)
79	free(strings);
80	strings = NULL;
81	curshell = NULL;
82	}
83
84	void
85	setusershell()
86	{
87
88	curshell = initshells();
89	}
90
91	static char **
92	initshells()
93	{
94	register char *sp, cp;
95	register FILE *fp;
96	struct stat statb;
97
98	if (shells != NULL)
99	free(shells);
100	shells = NULL;
101	if (strings != NULL)
102	free(strings);
103	strings = NULL;
104	if ((fp = fopen(_PATH_SHELLS, "r")) == NULL)
105	return (okshells);
106	if (fstat(fileno(fp), &statb) == -1) {
107	(void)fclose(fp);
108	return (okshells);
109	}
110	if ((strings = malloc((u_int)statb.st_size)) == NULL) {
111	(void)fclose(fp);
112	return (okshells);
113	}
114	shells = calloc((unsigned)statb.st_size / 3, sizeof (char *));
115	if (shells == NULL) {
116	(void)fclose(fp);
117	free(strings);
118	strings = NULL;
119	return (okshells);
120	}
121	sp = shells;
122	cp = strings;
123	while (fgets(cp, MAXPATHLEN + 1, fp) != NULL) {
124	while (cp != '#' && cp != '/' && *cp != '\0')
125	cp++;
126	if (cp == '#' \|\| cp == '\0')
127	continue;
128	*sp++ = cp;
129	while (!isspace(cp) && cp != '#' && *cp != '\0')
130	cp++;
131	*cp++ = '\0';
132	}
133	*sp = NULL;
134	(void)fclose(fp);
135	return (shells);
136	}
137
138	#endif /* HAVE_GETUSERSHELL */