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366534c2 WJ |
1 | /* |
2 | * Copyright (c) 1988 Regents of the University of California. | |
3 | * 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 | #ifndef lint | |
35 | char copyright[] = | |
36 | "@(#) Copyright (c) 1988 Regents of the University of California.\n\ | |
37 | All rights reserved.\n"; | |
38 | #endif /* not lint */ | |
39 | ||
40 | #ifndef lint | |
41 | static char sccsid[] = "@(#)chown.c 5.18 (Berkeley) 3/9/91"; | |
42 | #endif /* not lint */ | |
43 | ||
44 | #include <sys/param.h> | |
45 | #include <sys/stat.h> | |
46 | #include <sys/errno.h> | |
47 | #include <dirent.h> | |
48 | #include <fts.h> | |
49 | #include <pwd.h> | |
50 | #include <grp.h> | |
51 | #include <unistd.h> | |
52 | #include <stdio.h> | |
53 | #include <ctype.h> | |
54 | #include <stdlib.h> | |
55 | #include <string.h> | |
56 | ||
57 | int ischown, uid, gid, fflag, rflag, retval; | |
58 | char *gname, *myname; | |
59 | ||
60 | main(argc, argv) | |
61 | int argc; | |
62 | char **argv; | |
63 | { | |
64 | extern int optind; | |
65 | register FTS *fts; | |
66 | register FTSENT *p; | |
67 | register char *cp; | |
68 | int ch; | |
69 | ||
70 | myname = (cp = rindex(*argv, '/')) ? cp + 1 : *argv; | |
71 | ischown = myname[2] == 'o'; | |
72 | ||
73 | while ((ch = getopt(argc, argv, "Rf")) != EOF) | |
74 | switch((char)ch) { | |
75 | case 'R': | |
76 | rflag = 1; | |
77 | break; | |
78 | case 'f': | |
79 | fflag = 1; | |
80 | break; | |
81 | case '?': | |
82 | default: | |
83 | usage(); | |
84 | } | |
85 | argv += optind; | |
86 | argc -= optind; | |
87 | ||
88 | if (argc < 2) | |
89 | usage(); | |
90 | ||
91 | uid = gid = -1; | |
92 | if (ischown) { | |
93 | #ifdef SUPPORT_DOT | |
94 | if (cp = index(*argv, '.')) { | |
95 | *cp++ = '\0'; | |
96 | a_gid(cp); | |
97 | } else | |
98 | #endif | |
99 | if (cp = index(*argv, ':')) { | |
100 | *cp++ = '\0'; | |
101 | a_gid(cp); | |
102 | } | |
103 | a_uid(*argv); | |
104 | } | |
105 | else | |
106 | a_gid(*argv); | |
107 | ||
108 | if (rflag) { | |
109 | if (!(fts = fts_open(++argv, FTS_NOSTAT|FTS_PHYSICAL, 0))) { | |
110 | (void)fprintf(stderr, | |
111 | "%s: %s.\n", myname, strerror(errno)); | |
112 | exit(1); | |
113 | } | |
114 | while (p = fts_read(fts)) { | |
115 | if (p->fts_info == FTS_D) | |
116 | continue; | |
117 | if (p->fts_info == FTS_ERR) { | |
118 | error(p->fts_path); | |
119 | continue; | |
120 | } | |
121 | if (chown(p->fts_accpath, uid, gid) && !fflag) | |
122 | chownerr(p->fts_path); | |
123 | } | |
124 | exit(retval); | |
125 | } | |
126 | while (*++argv) | |
127 | if (chown(*argv, uid, gid) && !fflag) | |
128 | chownerr(*argv); | |
129 | exit(retval); | |
130 | } | |
131 | ||
132 | a_gid(s) | |
133 | register char *s; | |
134 | { | |
135 | struct group *gr; | |
136 | ||
137 | if (!*s) { | |
138 | gid = -1; /* argument was "uid." */ | |
139 | return; | |
140 | } | |
141 | gname = s; | |
142 | if (gr = getgrnam(s)) | |
143 | gid = gr->gr_gid; | |
144 | else { | |
145 | for (; *s && isdigit(*s); ++s); | |
146 | if (!*s) | |
147 | gid = atoi(gname); | |
148 | else { | |
149 | (void)fprintf(stderr, "%s: unknown group id: %s\n", | |
150 | myname, gname); | |
151 | exit(1); | |
152 | } | |
153 | } | |
154 | } | |
155 | ||
156 | a_uid(s) | |
157 | register char *s; | |
158 | { | |
159 | struct passwd *pw; | |
160 | char *uname; | |
161 | ||
162 | if (!*s) { | |
163 | uid = -1; /* argument was ".gid" */ | |
164 | return; | |
165 | } | |
166 | if (pw = getpwnam(s)) | |
167 | uid = pw->pw_uid; | |
168 | else { | |
169 | for (uname = s; *s && isdigit(*s); ++s); | |
170 | if (!*s) | |
171 | uid = atoi(uname); | |
172 | else { | |
173 | (void)fprintf(stderr, | |
174 | "chown: unknown user id: %s\n", uname); | |
175 | exit(1); | |
176 | } | |
177 | } | |
178 | } | |
179 | ||
180 | chownerr(file) | |
181 | char *file; | |
182 | { | |
183 | static int euid = -1, ngroups = -1; | |
184 | ||
185 | /* check for chown without being root */ | |
186 | if (errno != EPERM || uid != -1 && euid == -1 && (euid = geteuid())) { | |
187 | if (fflag) | |
188 | exit(0); | |
189 | error(file); | |
190 | exit(1); | |
191 | } | |
192 | /* check group membership; kernel just returns EPERM */ | |
193 | if (gid != -1 && ngroups == -1) { | |
194 | int groups[NGROUPS]; | |
195 | ||
196 | ngroups = getgroups(NGROUPS, groups); | |
197 | while (--ngroups >= 0 && gid != groups[ngroups]); | |
198 | if (ngroups < 0) { | |
199 | if (fflag) | |
200 | exit(0); | |
201 | (void)fprintf(stderr, | |
202 | "%s: you are not a member of group %s.\n", | |
203 | myname, gname); | |
204 | exit(1); | |
205 | } | |
206 | } | |
207 | if (!fflag) | |
208 | error(file); | |
209 | } | |
210 | ||
211 | error(name) | |
212 | char *name; | |
213 | { | |
214 | (void)fprintf(stderr, "%s: %s: %s\n", myname, name, strerror(errno)); | |
215 | retval = 1; | |
216 | } | |
217 | ||
218 | usage() | |
219 | { | |
220 | (void)fprintf(stderr, "usage: %s [-Rf] %s file ...\n", myname, | |
221 | ischown ? "[owner][:group]" : "group"); | |
222 | exit(1); | |
223 | } |