1 /* $Header: /src/pub/tcsh/tc.sched.c,v 3.19 2002/03/08 17:36:47 christos Exp $ */
3 * tc.sched.c: Scheduled command execution
5 * Karl Kleinpaste: Computer Consoles Inc. 1984
8 * Copyright (c) 1980, 1991 The Regents of the University of California.
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12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
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19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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37 RCSID("$Id: tc.sched.c,v 3.19 2002/03/08 17:36:47 christos Exp $")
43 extern int just_signaled;
46 struct sched_event *t_next;
50 static struct sched_event *sched_ptr = NULL;
57 return (sched_ptr->t_when);
58 return ((time_t) - 1);
67 register struct sched_event *tp, *tp1, *tp2;
69 int count, hours, minutes, dif_hour, dif_min;
71 bool relative; /* time specified as +hh:mm */
75 /* This is a major kludge because of a gcc linker */
76 /* Problem. It may or may not be needed for you */
77 #if defined(_MINIX) && !defined(_MINIX_VMD)
79 extern char *sprintf();
80 sprintf(kludge, CGETS(24, 1, "kludge"));
81 #endif /* _MINIX && !_MINIX_VMD */
87 if ((fmt = varval(STRsched)) == STRNULL)
88 fmt = str2short("%h\t%T\t%R\n");
89 /* print list of scheduled events */
90 for (count = 1, tp = sched_ptr; tp; count++, tp = tp->t_next) {
91 Char buf[BUFSIZE], sbuf[BUFSIZE];
92 blkexpand(tp->t_lex, buf);
93 tprintf(FMT_SCHED, sbuf, fmt, sizeof(sbuf),
94 short2str(buf), tp->t_when, (ptr_t) &count);
102 /* remove item from list */
104 stderror(ERR_NOSCHED);
106 stderror(ERR_SCHEDUSAGE);
107 count = atoi(short2str(++cp));
109 stderror(ERR_SCHEDUSAGE);
121 stderror(ERR_SCHEDEV);
123 sched_ptr = tp->t_next;
125 tp1->t_next = tp->t_next;
131 /* else, add an item to the list */
133 stderror(ERR_SCHEDCOM);
135 if (!Isdigit(*cp)) { /* not abs. time */
137 stderror(ERR_SCHEDUSAGE);
141 hours = atoi(short2str(cp));
142 while (*cp && *cp != ':' && *cp != 'a' && *cp != 'p')
144 if (*cp && *cp == ':')
145 minutes = atoi(short2str(++cp));
146 if ((hours < 0) || (minutes < 0) ||
147 (hours > 23) || (minutes > 59))
148 stderror(ERR_SCHEDTIME);
149 while (*cp && *cp != 'p' && *cp != 'a')
152 stderror(ERR_SCHEDREL);
155 (void) time(&cur_time);
156 ltp = localtime(&cur_time);
162 if ((dif_hour = hours - ltp->tm_hour) < 0)
164 if ((dif_min = minutes - ltp->tm_min) < 0) {
166 if ((--dif_hour) < 0)
170 tp = (struct sched_event *) xcalloc(1, sizeof *tp);
172 tp->t_when = cur_time - ltp->tm_sec + dif_hour * 3600 + dif_min * 60;
174 tp->t_when = cur_time - ltp->tm_sec + dif_hour * 3600L + dif_min * 60L;
176 /* use of tm_sec: get to beginning of minute. */
177 if (!sched_ptr || tp->t_when < sched_ptr->t_when) {
178 tp->t_next = sched_ptr;
182 tp1 = sched_ptr->t_next;
184 while (tp1 && tp->t_when >= tp1->t_when) {
191 tp->t_lex = saveblk(v);
195 * Execute scheduled events
203 register struct sched_event *tp, *tp1;
204 struct wordent cmd, *nextword, *lastword;
207 extern Char GettingInput;
211 omask = sigblock(sigmask(SIGINT)) & ~sigmask(SIGINT);
213 (void) sighold(SIGINT);
218 (void) time(&cur_time);
221 /* bugfix by: Justin Bur at Universite de Montreal */
223 * this test wouldn't be necessary if this routine were not called before
224 * each prompt (in sh.c). But it is, to catch missed alarms. Someone
225 * ought to fix it all up. -jbb
227 if (!(tp && tp->t_when < cur_time)) {
229 (void) sigsetmask(omask);
231 (void) sigrelse(SIGINT);
239 while (tp && tp->t_when < cur_time) {
241 xfree((ptr_t) seterr);
247 for (cp = *v; cp; cp = *++v) {
248 nextword = (struct wordent *) xcalloc(1, sizeof cmd);
249 nextword->word = Strsave(cp);
250 lastword->next = nextword;
251 nextword->prev = lastword;
254 lastword->next = &cmd;
257 sched_ptr = tp = tp1->t_next; /* looping termination cond: */
258 blkfree(tp1->t_lex); /* straighten out in case of */
259 xfree((ptr_t) tp1); /* command blow-up. */
261 /* expand aliases like process() does. */
263 /* build a syntax tree for the command. */
264 t = syntax(cmd.next, &cmd, 0);
267 /* execute the parse tree. */
268 execute(t, -1, NULL, NULL, TRUE);
269 /* done. free the lex list and parse tree. */
270 freelex(&cmd), freesyn(t);
272 if (GettingInput && !just_signaled) { /* PWP */
274 ClearLines(); /* do a real refresh since something may */
275 ClearDisp(); /* have printed to the screen */
281 (void) sigsetmask(omask);
283 (void) sigrelse(SIGINT);