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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1985, 1987, 1988 The 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) 1985, 1987, 1988 The Regents of the University of California.\n\ | |
37 | All rights reserved.\n"; | |
38 | #endif /* not lint */ | |
39 | ||
40 | #ifndef lint | |
41 | static char sccsid[] = "@(#)date.c 5.5 (Berkeley) 3/18/91"; | |
42 | #endif /* not lint */ | |
43 | ||
44 | #include <sys/param.h> | |
45 | #include <sys/time.h> | |
46 | #include <sys/file.h> | |
47 | #include <syslog.h> | |
48 | #include <unistd.h> | |
49 | #include <stdio.h> | |
50 | #include <stdlib.h> | |
51 | #include <string.h> | |
52 | #include <ctype.h> | |
53 | ||
54 | time_t tval; | |
55 | int retval, nflag; | |
56 | ||
57 | main(argc, argv) | |
58 | int argc; | |
59 | char **argv; | |
60 | { | |
61 | extern int optind; | |
62 | extern char *optarg; | |
63 | struct timezone tz; | |
64 | int ch, rflag; | |
65 | char *format, buf[1024]; | |
66 | ||
67 | tz.tz_dsttime = tz.tz_minuteswest = 0; | |
68 | rflag = 0; | |
69 | while ((ch = getopt(argc, argv, "d:nr:ut:")) != EOF) | |
70 | switch((char)ch) { | |
71 | case 'd': /* daylight savings time */ | |
72 | tz.tz_dsttime = atoi(optarg) ? 1 : 0; | |
73 | break; | |
74 | case 'n': /* don't set network */ | |
75 | nflag = 1; | |
76 | break; | |
77 | case 'r': /* user specified seconds */ | |
78 | rflag = 1; | |
79 | tval = atol(optarg); | |
80 | break; | |
81 | case 'u': /* do everything in GMT */ | |
82 | (void)setenv("TZ", "GMT0", 1); | |
83 | break; | |
84 | case 't': /* minutes west of GMT */ | |
85 | /* error check; don't allow "PST" */ | |
86 | if (isdigit(*optarg)) { | |
87 | tz.tz_minuteswest = atoi(optarg); | |
88 | break; | |
89 | } | |
90 | /* FALLTHROUGH */ | |
91 | default: | |
92 | usage(); | |
93 | } | |
94 | argc -= optind; | |
95 | argv += optind; | |
96 | ||
97 | /* | |
98 | * If -d or -t, set the timezone or daylight savings time; this | |
99 | * doesn't belong here, there kernel should not know about either. | |
100 | */ | |
101 | if ((tz.tz_minuteswest || tz.tz_dsttime) && | |
102 | settimeofday((struct timeval *)NULL, &tz)) { | |
103 | perror("date: settimeofday"); | |
104 | exit(1); | |
105 | } | |
106 | ||
107 | if (!rflag && time(&tval) == -1) { | |
108 | perror("date: time"); | |
109 | exit(1); | |
110 | } | |
111 | ||
112 | format = "%a %b %e %H:%M:%S %Z %Y\n"; | |
113 | ||
114 | /* allow the operands in any order */ | |
115 | if (*argv && **argv == '+') { | |
116 | format = *argv + 1; | |
117 | ++argv; | |
118 | } | |
119 | ||
120 | if (*argv) { | |
121 | setthetime(*argv); | |
122 | ++argv; | |
123 | } | |
124 | ||
125 | if (*argv && **argv == '+') | |
126 | format = *argv + 1; | |
127 | ||
128 | (void)strftime(buf, sizeof(buf), format, localtime(&tval)); | |
129 | (void)printf("%s", buf); | |
130 | exit(retval); | |
131 | } | |
132 | ||
133 | #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; | |
134 | setthetime(p) | |
135 | register char *p; | |
136 | { | |
137 | register struct tm *lt; | |
138 | struct timeval tv; | |
139 | int dot; | |
140 | char *t; | |
141 | ||
142 | for (t = p, dot = 0; *t; ++t) | |
143 | if (!isdigit(*t) && (*t != '.' || dot++)) | |
144 | badformat(); | |
145 | ||
146 | lt = localtime(&tval); | |
147 | ||
148 | if (t = index(p, '.')) { /* .ss */ | |
149 | *t++ = '\0'; | |
150 | if (lt->tm_sec > 61) | |
151 | badformat(); | |
152 | } else | |
153 | lt->tm_sec = 0; | |
154 | ||
155 | for (t = p; *t; ++t) | |
156 | if (!isdigit(*t)) | |
157 | badformat(); | |
158 | ||
159 | switch (strlen(p)) { | |
160 | case 10: /* yy */ | |
161 | lt->tm_year = ATOI2(p); | |
162 | if (lt->tm_year < 69) /* hack for 2000 ;-} */ | |
163 | lt->tm_year += 100; | |
164 | /* FALLTHROUGH */ | |
165 | case 8: /* mm */ | |
166 | lt->tm_mon = ATOI2(p); | |
167 | if (lt->tm_mon > 12) | |
168 | badformat(); | |
169 | --lt->tm_mon; /* time struct is 0 - 11 */ | |
170 | /* FALLTHROUGH */ | |
171 | case 6: /* dd */ | |
172 | lt->tm_mday = ATOI2(p); | |
173 | if (lt->tm_mday > 31) | |
174 | badformat(); | |
175 | /* FALLTHROUGH */ | |
176 | case 4: /* hh */ | |
177 | lt->tm_hour = ATOI2(p); | |
178 | if (lt->tm_hour > 23) | |
179 | badformat(); | |
180 | /* FALLTHROUGH */ | |
181 | case 2: /* mm */ | |
182 | lt->tm_min = ATOI2(p); | |
183 | if (lt->tm_min > 59) | |
184 | badformat(); | |
185 | break; | |
186 | default: | |
187 | badformat(); | |
188 | } | |
189 | ||
190 | /* convert broken-down time to GMT clock time */ | |
191 | if ((tval = mktime(lt)) == -1) | |
192 | badformat(); | |
193 | ||
194 | if (!(p = getlogin())) /* single-user or no tty */ | |
195 | p = "root"; | |
196 | syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p); | |
197 | ||
198 | /* set the time */ | |
199 | if (nflag || netsettime(tval)) { | |
200 | logwtmp("|", "date", ""); | |
201 | tv.tv_sec = tval; | |
202 | tv.tv_usec = 0; | |
203 | if (settimeofday(&tv, (struct timezone *)NULL)) { | |
204 | perror("date: settimeofday"); | |
205 | exit(1); | |
206 | } | |
207 | logwtmp("{", "date", ""); | |
208 | } | |
209 | } | |
210 | ||
211 | badformat() | |
212 | { | |
213 | (void)fprintf(stderr, "date: illegal time format.\n"); | |
214 | usage(); | |
215 | } | |
216 | ||
217 | usage() | |
218 | { | |
219 | (void)fprintf(stderr, | |
220 | "usage: date [-nu] [-d dst] [-r seconds] [-t west] [+format]\n"); | |
221 | (void)fprintf(stderr, " [yy[mm[dd[hh]]]]mm[.ss]]\n"); | |
222 | exit(1); | |
223 | } |