2 * Copyright (c) 1985, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
34 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid[] = "@(#)getusershell.c 8.1 (Berkeley) 6/4/93";
36 #endif /* LIBC_SCCS and not lint */
38 #include <sys/param.h>
48 * Local shells should NOT be added here. They should be added in
52 static const char *okshells[] = { _PATH_BSHELL, _PATH_CSHELL, NULL };
53 static const char **curshell, **shells, *strings;
54 static const char **initshells __P((void));
57 * Get a list of shells from _PATH_SHELLS, if it exists.
65 curshell = initshells();
69 return (char *) ret; /* Cast away `const' for history reasons. */
89 curshell = initshells();
95 register char **sp, *cp;
100 free((char *) shells);
103 free((char *) strings);
105 if ((fp = fopen(_PATH_SHELLS, "r")) == NULL)
107 if (fstat(fileno(fp), &statb) == -1) {
111 if ((strings = malloc((u_int)statb.st_size + 1)) == NULL) {
115 shells = calloc((unsigned)statb.st_size / 3, sizeof (char *));
116 if (shells == NULL) {
122 sp = (char *) shells;
123 cp = (char *) strings;
124 while (fgets(cp, statb.st_size - (cp - strings), fp) != NULL) {
125 while (*cp != '#' && *cp != '/' && *cp != '\0')
127 if (*cp == '#' || *cp == '\0')
130 while (!isspace(*cp) && *cp != '#' && *cp != '\0')