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authorDamien Miller <djm@mindrot.org>2001-03-19 10:09:27 +1100
committerDamien Miller <djm@mindrot.org>2001-03-19 10:09:27 +1100
commit9de61e8c596e1f7e52f780dd87bde2df779b1237 (patch)
tree99e0f2e4bccb64f63b793197b3b1a31f7a5080f4 /openbsd-compat/getusershell.c
parenta2dc6030f769d7737bf481d2d4c77f82bc4b7965 (diff)
- (djm) Add getusershell() functions from OpenBSD CVS
Diffstat (limited to 'openbsd-compat/getusershell.c')
-rw-r--r--openbsd-compat/getusershell.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/openbsd-compat/getusershell.c b/openbsd-compat/getusershell.c
new file mode 100644
index 000000000..b334ba2e7
--- /dev/null
+++ b/openbsd-compat/getusershell.c
@@ -0,0 +1,138 @@
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)
40static 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
51static char *okshells[] = { _PATH_BSHELL, _PATH_CSHELL, NULL };
52static char **curshell, **shells, *strings;
53static char **initshells __P((void));
54
55/*
56 * Get a list of shells from _PATH_SHELLS, if it exists.
57 */
58char *
59getusershell()
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
71void
72endusershell()
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
84void
85setusershell()
86{
87
88 curshell = initshells();
89}
90
91static char **
92initshells()
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 */