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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * This version has been hevily modified for use with uClibc
30 * November 2002, Erik Andersen <andersen@codepoet.org>
34 #include <sys/param.h>
38 #include <stdio_ext.h>
44 libc_hidden_proto(fstat)
45 libc_hidden_proto(fopen)
46 libc_hidden_proto(fclose)
47 libc_hidden_proto(__fsetlocking)
48 libc_hidden_proto(fileno)
49 libc_hidden_proto(fgets_unlocked)
52 * Local shells should NOT be added here. They should be added in
56 static const char * const validsh[] = { _PATH_BSHELL, _PATH_CSHELL, NULL };
57 static char **curshell, **shells, *strings;
58 static char **initshells __P((void));
61 * Get a list of shells from _PATH_SHELLS, if it exists.
63 char * getusershell(void)
68 curshell = initshells();
75 static void __free_initshell_memory(void)
81 if (strings != NULL) {
87 void endusershell(void)
89 __free_initshell_memory();
93 void setusershell(void)
96 curshell = initshells();
99 static char ** initshells(void)
101 register char **sp, *cp;
106 __free_initshell_memory();
108 if ((fp = fopen(_PATH_SHELLS, "r")) == NULL)
109 return (char **) validsh;
110 if (fstat(fileno(fp), &statb) == -1) {
113 if ((strings = malloc((unsigned)statb.st_size + 1)) == NULL) {
116 if ((shells = calloc((unsigned)statb.st_size / 3, sizeof (char *))) == NULL) {
119 /* No threads using this stream. */
120 #ifdef __UCLIBC_HAS_THREADS__
121 __fsetlocking (fp, FSETLOCKING_BYCALLER);
125 flen = statb.st_size;
126 while (fgets_unlocked(cp, flen - (cp - strings), fp) != NULL) {
127 while (*cp != '#' && *cp != '/' && *cp != '\0')
129 if (*cp == '#' || *cp == '\0')
132 while (!isspace(*cp) && *cp != '#' && *cp != '\0')
141 __free_initshell_memory();
143 return (char **) validsh;