Commit | Line | Data |
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6c6c970d | 1 | /* |
74155b62 KB |
2 | * Copyright (c) 1989, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
6c6c970d | 4 | * |
269a7923 | 5 | * %sccs.include.redist.c% |
6c6c970d KB |
6 | */ |
7 | ||
2ce81398 | 8 | #if defined(LIBC_SCCS) && !defined(lint) |
74155b62 | 9 | static char sccsid[] = "@(#)getgrent.c 8.1 (Berkeley) %G%"; |
6c6c970d | 10 | #endif /* LIBC_SCCS and not lint */ |
bb22887e | 11 | |
6c6c970d | 12 | #include <sys/types.h> |
41746c4f | 13 | #include <stdio.h> |
c5980113 | 14 | #include <stdlib.h> |
41746c4f BJ |
15 | #include <grp.h> |
16 | ||
6c6c970d KB |
17 | static FILE *_gr_fp; |
18 | static struct group _gr_group; | |
19 | static int _gr_stayopen; | |
eb92650d | 20 | static int grscan(), start_gr(); |
41746c4f | 21 | |
6c6c970d KB |
22 | #define MAXGRP 200 |
23 | static char *members[MAXGRP]; | |
24 | #define MAXLINELENGTH 1024 | |
25 | static char line[MAXLINELENGTH]; | |
41746c4f | 26 | |
6c6c970d KB |
27 | struct group * |
28 | getgrent() | |
41746c4f | 29 | { |
eb92650d KB |
30 | if (!_gr_fp && !start_gr() || !grscan(0, 0, NULL)) |
31 | return(NULL); | |
6c6c970d | 32 | return(&_gr_group); |
41746c4f BJ |
33 | } |
34 | ||
6c6c970d KB |
35 | struct group * |
36 | getgrnam(name) | |
c5980113 | 37 | const char *name; |
6c6c970d KB |
38 | { |
39 | int rval; | |
40 | ||
41 | if (!start_gr()) | |
eb92650d | 42 | return(NULL); |
6c6c970d KB |
43 | rval = grscan(1, 0, name); |
44 | if (!_gr_stayopen) | |
45 | endgrent(); | |
eb92650d | 46 | return(rval ? &_gr_group : NULL); |
6c6c970d KB |
47 | } |
48 | ||
49 | struct group * | |
c5980113 DS |
50 | #ifdef __STDC__ |
51 | getgrgid(gid_t gid) | |
52 | #else | |
6c6c970d | 53 | getgrgid(gid) |
c5980113 DS |
54 | gid_t gid; |
55 | #endif | |
6c6c970d KB |
56 | { |
57 | int rval; | |
58 | ||
59 | if (!start_gr()) | |
eb92650d KB |
60 | return(NULL); |
61 | rval = grscan(1, gid, NULL); | |
6c6c970d KB |
62 | if (!_gr_stayopen) |
63 | endgrent(); | |
eb92650d | 64 | return(rval ? &_gr_group : NULL); |
6c6c970d KB |
65 | } |
66 | ||
67 | static | |
68 | start_gr() | |
41746c4f | 69 | { |
6c6c970d KB |
70 | if (_gr_fp) { |
71 | rewind(_gr_fp); | |
72 | return(1); | |
41746c4f | 73 | } |
eb92650d | 74 | return((_gr_fp = fopen(_PATH_GROUP, "r")) ? 1 : 0); |
41746c4f BJ |
75 | } |
76 | ||
c5980113 | 77 | int |
6c6c970d | 78 | setgrent() |
41746c4f | 79 | { |
6c6c970d | 80 | return(setgroupent(0)); |
41746c4f BJ |
81 | } |
82 | ||
c5980113 | 83 | int |
6c6c970d KB |
84 | setgroupent(stayopen) |
85 | int stayopen; | |
86 | { | |
87 | if (!start_gr()) | |
88 | return(0); | |
89 | _gr_stayopen = stayopen; | |
90 | return(1); | |
91 | } | |
92 | ||
93 | void | |
94 | endgrent() | |
41746c4f | 95 | { |
6c6c970d KB |
96 | if (_gr_fp) { |
97 | (void)fclose(_gr_fp); | |
eb92650d | 98 | _gr_fp = NULL; |
41746c4f | 99 | } |
41746c4f | 100 | } |
5a029ac1 | 101 | |
6c6c970d KB |
102 | static |
103 | grscan(search, gid, name) | |
104 | register int search, gid; | |
105 | register char *name; | |
106 | { | |
107 | register char *cp, **m; | |
0f38f0b7 | 108 | char *bp; |
6c6c970d KB |
109 | char *fgets(), *strsep(), *index(); |
110 | ||
111 | for (;;) { | |
112 | if (!fgets(line, sizeof(line), _gr_fp)) | |
113 | return(0); | |
0f38f0b7 | 114 | bp = line; |
6c6c970d KB |
115 | /* skip lines that are too big */ |
116 | if (!index(line, '\n')) { | |
117 | int ch; | |
118 | ||
119 | while ((ch = getc(_gr_fp)) != '\n' && ch != EOF) | |
120 | ; | |
121 | continue; | |
122 | } | |
0f38f0b7 | 123 | _gr_group.gr_name = strsep(&bp, ":\n"); |
6c6c970d KB |
124 | if (search && name && strcmp(_gr_group.gr_name, name)) |
125 | continue; | |
0f38f0b7 MT |
126 | _gr_group.gr_passwd = strsep(&bp, ":\n"); |
127 | if (!(cp = strsep(&bp, ":\n"))) | |
6c6c970d KB |
128 | continue; |
129 | _gr_group.gr_gid = atoi(cp); | |
7d9b2097 | 130 | if (search && name == NULL && _gr_group.gr_gid != gid) |
6c6c970d KB |
131 | continue; |
132 | for (m = _gr_group.gr_mem = members;; ++m) { | |
133 | if (m == &members[MAXGRP - 1]) { | |
134 | *m = NULL; | |
135 | break; | |
136 | } | |
0f38f0b7 | 137 | if ((*m = strsep(&bp, ", \n")) == NULL) |
6c6c970d KB |
138 | break; |
139 | } | |
140 | return(1); | |
141 | } | |
142 | /* NOTREACHED */ | |
5a029ac1 | 143 | } |