1 /* $Header: /p/tcsh/cvsroot/tcsh/tc.sched.c,v 3.25 2006/03/02 18:46:45 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.
11 * Redistribution and use in source and binary forms, with or without
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
18 * documentation and/or other materials provided with the distribution.
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
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 RCSID("$tcsh: tc.sched.c,v 3.25 2006/03/02 18:46:45 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);
63 dosched(Char **v, struct command *c)
65 struct sched_event *tp, **pp;
67 int count, hours, minutes, dif_hour, dif_min;
69 int relative; /* time specified as +hh:mm */
73 /* This is a major kludge because of a gcc linker */
74 /* Problem. It may or may not be needed for you */
75 #if defined(_MINIX) && !defined(_MINIX_VMD)
77 extern char *sprintf();
78 sprintf(kludge, CGETS(24, 1, "kludge"));
79 #endif /* _MINIX && !_MINIX_VMD */
85 if ((fmt = varval(STRsched)) == STRNULL)
86 fmt = str2short("%h\t%T\t%R\n");
87 /* print list of scheduled events */
88 for (count = 1, tp = sched_ptr; tp; count++, tp = tp->t_next) {
91 buf = blkexpand(tp->t_lex);
92 cleanup_push(buf, xfree);
93 str = tprintf(FMT_SCHED, fmt, short2str(buf), tp->t_when, &count);
95 cleanup_push(str, xfree);
104 /* remove item from list */
106 stderror(ERR_NOSCHED);
108 stderror(ERR_SCHEDUSAGE);
109 count = atoi(short2str(++cp));
111 stderror(ERR_SCHEDUSAGE);
123 stderror(ERR_SCHEDEV);
130 /* else, add an item to the list */
132 stderror(ERR_SCHEDCOM);
134 if (!Isdigit(*cp)) { /* not abs. time */
136 stderror(ERR_SCHEDUSAGE);
140 hours = atoi(short2str(cp));
141 while (*cp && *cp != ':' && *cp != 'a' && *cp != 'p')
143 if (*cp && *cp == ':')
144 minutes = atoi(short2str(++cp));
145 if ((hours < 0) || (minutes < 0) ||
146 (hours > 23) || (minutes > 59))
147 stderror(ERR_SCHEDTIME);
148 while (*cp && *cp != 'p' && *cp != 'a')
151 stderror(ERR_SCHEDREL);
154 (void) time(&cur_time);
155 ltp = localtime(&cur_time);
161 if ((dif_hour = hours - ltp->tm_hour) < 0)
163 if ((dif_min = minutes - ltp->tm_min) < 0) {
165 if ((--dif_hour) < 0)
169 tp = xcalloc(1, sizeof *tp);
171 tp->t_when = cur_time - ltp->tm_sec + dif_hour * 3600 + dif_min * 60;
173 tp->t_when = cur_time - ltp->tm_sec + dif_hour * 3600L + dif_min * 60L;
175 /* use of tm_sec: get to beginning of minute. */
176 for (pp = &sched_ptr; *pp != NULL && tp->t_when >= (*pp)->t_when;
181 tp->t_lex = saveblk(v);
185 * Execute scheduled events
191 struct sched_event *tp;
192 struct wordent cmd, *nextword, *lastword;
197 cleanup_push(&pintr_disabled, disabled_cleanup);
199 (void) time(&cur_time);
201 /* bugfix by: Justin Bur at Universite de Montreal */
203 * this test wouldn't be necessary if this routine were not called before
204 * each prompt (in sh.c). But it is, to catch missed alarms. Someone
205 * ought to fix it all up. -jbb
207 if (!(sched_ptr && sched_ptr->t_when < cur_time)) {
208 cleanup_until(&pintr_disabled);
215 while ((tp = sched_ptr) != NULL && tp->t_when < cur_time) {
223 for (cp = *v; cp; cp = *++v) {
224 nextword = xcalloc(1, sizeof cmd);
225 nextword->word = Strsave(cp);
226 lastword->next = nextword;
227 nextword->prev = lastword;
230 lastword->next = &cmd;
232 sched_ptr = tp->t_next; /* looping termination cond: */
233 blkfree(tp->t_lex); /* straighten out in case of */
234 xfree(tp); /* command blow-up. */
236 cleanup_push(&cmd, lex_cleanup);
237 /* expand aliases like process() does. */
239 /* build a syntax tree for the command. */
240 t = syntax(cmd.next, &cmd, 0);
241 cleanup_push(t, syntax_cleanup);
244 /* execute the parse tree. */
245 execute(t, -1, NULL, NULL, TRUE);
246 /* done. free the lex list and parse tree. */
249 if (GettingInput && !just_signaled) { /* PWP */
251 ClearLines(); /* do a real refresh since something may */
252 ClearDisp(); /* have printed to the screen */
257 cleanup_until(&pintr_disabled);