Commit | Line | Data |
---|---|---|
88f62f26 KT |
1 | /* |
2 | * at time mon day | |
3 | * at time wday | |
4 | * at time wday 'week' | |
5 | * | |
6 | */ | |
7 | #include <stdio.h> | |
8 | #include <ctype.h> | |
9 | #include <time.h> | |
10 | #include <signal.h> | |
11 | ||
12 | #define HOUR 100 | |
13 | #define HALFDAY (12*HOUR) | |
14 | #define DAY (24*HOUR) | |
15 | #define THISDAY "/usr/spool/at" | |
16 | ||
17 | char *days[] = { | |
18 | "sunday", | |
19 | "monday", | |
20 | "tuesday", | |
21 | "wednesday", | |
22 | "thursday", | |
23 | "friday", | |
24 | "saturday", | |
25 | }; | |
26 | ||
27 | struct monstr { | |
28 | char *mname; | |
29 | int mlen; | |
30 | } months[] = { | |
31 | { "january", 31 }, | |
32 | { "february", 28 }, | |
33 | { "march", 31 }, | |
34 | { "april", 30 }, | |
35 | { "may", 31 }, | |
36 | { "june", 30 }, | |
37 | { "july", 31 }, | |
38 | { "august", 31 }, | |
39 | { "september", 30 }, | |
40 | { "october", 31 }, | |
41 | { "november", 30 }, | |
42 | { "december", 31 }, | |
43 | { 0, 0 }, | |
44 | }; | |
45 | ||
46 | char fname[100]; | |
47 | int utime; /* requested time in grains */ | |
48 | int now; /* when is it */ | |
49 | int uday; /* day of year to be done */ | |
50 | int uyear; /* year */ | |
51 | int today; /* day of year today */ | |
52 | FILE *file; | |
53 | FILE *ifile; | |
54 | char **environ; | |
55 | char *prefix(); | |
56 | FILE *popen(); | |
57 | ||
58 | main(argc, argv) | |
59 | char **argv; | |
60 | { | |
61 | extern onintr(); | |
62 | register c; | |
63 | char pwbuf[100]; | |
64 | FILE *pwfil; | |
65 | int larg; | |
66 | ||
67 | /* argv[1] is the user's time: e.g., 3AM */ | |
68 | /* argv[2] is a month name or day of week */ | |
69 | /* argv[3] is day of month or 'week' */ | |
70 | /* another argument might be an input file */ | |
71 | if (argc < 2) { | |
72 | fprintf(stderr, "at: arg count\n"); | |
73 | exit(1); | |
74 | } | |
75 | makeutime(argv[1]); | |
76 | larg = makeuday(argc,argv)+1; | |
77 | if (uday==today && larg<=2 && utime<=now) | |
78 | uday++; | |
79 | c = uyear%4==0? 366: 365; | |
80 | if (uday >= c) { | |
81 | uday -= c; | |
82 | uyear++; | |
83 | } | |
84 | filename(THISDAY, uyear, uday, utime); | |
85 | ifile = stdin; | |
86 | if (argc > larg) | |
87 | ifile = fopen(argv[larg], "r"); | |
88 | if (ifile == NULL) { | |
89 | fprintf(stderr, "at: cannot open input: %s\n", argv[larg]); | |
90 | exit(1); | |
91 | } | |
92 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) | |
93 | signal(SIGINT, onintr); | |
94 | file = fopen(fname, "a"); | |
95 | chmod(fname, 0644); | |
96 | if (file == NULL) { | |
97 | fprintf(stderr, "at: cannot open memo file\n"); | |
98 | exit(1); | |
99 | } | |
100 | if ((pwfil = popen("pwd", "r")) == NULL) { | |
101 | fprintf(stderr, "at: can't execute pwd\n"); | |
102 | exit(1); | |
103 | } | |
104 | fgets(pwbuf, 100, pwfil); | |
105 | pclose(pwfil); | |
106 | fprintf(file, "cd %s", pwbuf); | |
107 | if (environ) { | |
108 | char **ep = environ; | |
109 | while(*ep) | |
110 | fprintf(file, "%s\n", *ep++); | |
111 | } | |
112 | while((c = getc(ifile)) != EOF) { | |
113 | putc(c, file); | |
114 | } | |
115 | exit(0); | |
116 | } | |
117 | ||
118 | makeutime(pp) | |
119 | char *pp; | |
120 | { | |
121 | register val; | |
122 | register char *p; | |
123 | ||
124 | /* p points to a user time */ | |
125 | p = pp; | |
126 | val = 0; | |
127 | while(isdigit(*p)) { | |
128 | val = val*10+(*p++ -'0'); | |
129 | } | |
130 | if (p-pp < 3) | |
131 | val *= HOUR; | |
132 | ||
133 | for (;;) { | |
134 | switch(*p) { | |
135 | ||
136 | case ':': | |
137 | ++p; | |
138 | if (isdigit(*p)) { | |
139 | if (isdigit(p[1])) { | |
140 | val +=(10* *p + p[1] - 11*'0'); | |
141 | p += 2; | |
142 | continue; | |
143 | } | |
144 | } | |
145 | fprintf(stderr, "at: bad time format:\n"); | |
146 | exit(1); | |
147 | ||
148 | case 'A': | |
149 | case 'a': | |
150 | if (val >= HALFDAY+HOUR) | |
151 | val = DAY+1; /* illegal */ | |
152 | if (val >= HALFDAY && val <(HALFDAY+HOUR)) | |
153 | val -= HALFDAY; | |
154 | break; | |
155 | ||
156 | case 'P': | |
157 | case 'p': | |
158 | if (val >= HALFDAY+HOUR) | |
159 | val = DAY+1; /* illegal */ | |
160 | if (val < HALFDAY) | |
161 | val += HALFDAY; | |
162 | break; | |
163 | ||
164 | case 'n': | |
165 | case 'N': | |
166 | val = HALFDAY; | |
167 | break; | |
168 | ||
169 | case 'M': | |
170 | case 'm': | |
171 | val = 0; | |
172 | break; | |
173 | ||
174 | ||
175 | case '\0': | |
176 | case ' ': | |
177 | /* 24 hour time */ | |
178 | if (val == DAY) | |
179 | val -= DAY; | |
180 | break; | |
181 | ||
182 | default: | |
183 | fprintf(stderr, "at: bad time format\n"); | |
184 | exit(1); | |
185 | ||
186 | } | |
187 | break; | |
188 | } | |
189 | if (val < 0 || val >= DAY) { | |
190 | fprintf(stderr, "at: time out of range\n"); | |
191 | exit(1); | |
192 | } | |
193 | if (val%HOUR >= 60) { | |
194 | fprintf(stderr, "at: illegal minute field\n"); | |
195 | exit(1); | |
196 | } | |
197 | utime = val; | |
198 | } | |
199 | ||
200 | ||
201 | makeuday(argc,argv) | |
202 | char **argv; | |
203 | { | |
204 | /* the presumption is that argv[2], argv[3] are either | |
205 | month day OR weekday [week]. Returns either 2 or 3 as last | |
206 | argument used */ | |
207 | /* first of all, what's today */ | |
208 | long tm; | |
209 | int found = -1; | |
210 | char **ps; | |
211 | struct tm *detail, *localtime(); | |
212 | struct monstr *pt; | |
213 | ||
214 | time(&tm); | |
215 | detail = localtime(&tm); | |
216 | uday = today = detail->tm_yday; | |
217 | uyear = detail->tm_year; | |
218 | now = detail->tm_hour*100+detail->tm_min; | |
219 | if (argc<=2) | |
220 | return(1); | |
221 | /* is the next argument a month name ? */ | |
222 | for (pt=months; pt->mname; pt++) { | |
223 | if (prefix(argv[2], pt->mname)) { | |
224 | if (found<0) | |
225 | found = pt-months; | |
226 | else { | |
227 | fprintf(stderr, "at: ambiguous month\n"); | |
228 | exit(1); | |
229 | } | |
230 | } | |
231 | } | |
232 | if (found>=0) { | |
233 | if (argc<=3) | |
234 | return(2); | |
235 | uday = atoi(argv[3]) - 1; | |
236 | if (uday<0) { | |
237 | fprintf(stderr, "at: illegal day\n"); | |
238 | exit(1); | |
239 | } | |
240 | while(--found>=0) | |
241 | uday += months[found].mlen; | |
242 | if (detail->tm_year%4==0 && uday>59) | |
243 | uday += 1; | |
244 | return(3); | |
245 | } | |
246 | /* not a month, try day of week */ | |
247 | found = -1; | |
248 | for (ps=days; ps<days+7; ps++) { | |
249 | if (prefix(argv[2], *ps)) { | |
250 | if (found<0) | |
251 | found = ps-days; | |
252 | else { | |
253 | fprintf(stderr, "at: ambiguous day of week\n"); | |
254 | exit(1); | |
255 | } | |
256 | } | |
257 | } | |
258 | if (found<0) | |
259 | return(1); | |
260 | /* find next day of this sort */ | |
261 | uday = found - detail->tm_wday; | |
262 | if (uday<=0) | |
263 | uday += 7; | |
264 | uday += today; | |
265 | if (argc>3 && strcmp("week", argv[3])==0) { | |
266 | uday += 7; | |
267 | return(3); | |
268 | } | |
269 | return(2); | |
270 | } | |
271 | ||
272 | char * | |
273 | prefix(begin, full) | |
274 | char *begin, *full; | |
275 | { | |
276 | int c; | |
277 | while (c = *begin++) { | |
278 | if (isupper(c)) | |
279 | c = tolower(c); | |
280 | if (*full != c) | |
281 | return(0); | |
282 | else | |
283 | full++; | |
284 | } | |
285 | return(full); | |
286 | } | |
287 | ||
288 | filename(dir, y, d, t) | |
289 | char *dir; | |
290 | { | |
291 | register i; | |
292 | ||
293 | for (i=0; ; i += 53) { | |
294 | sprintf(fname, "%s/%02d.%03d.%04d.%02d", dir, y, d, t, | |
295 | (getpid()+i)%100); | |
296 | if (access(fname, 0) == -1) | |
297 | return; | |
298 | } | |
299 | } | |
300 | ||
301 | onintr() | |
302 | { | |
303 | unlink(fname); | |
304 | exit(1); | |
305 | } |