tc.sched.c revision 145479
1145479Smp/* $Header: /src/pub/tcsh/tc.sched.c,v 3.21 2004/11/23 02:10:50 christos Exp $ */ 259243Sobrien/* 359243Sobrien * tc.sched.c: Scheduled command execution 459243Sobrien * 559243Sobrien * Karl Kleinpaste: Computer Consoles Inc. 1984 659243Sobrien */ 759243Sobrien/*- 859243Sobrien * Copyright (c) 1980, 1991 The Regents of the University of California. 959243Sobrien * All rights reserved. 1059243Sobrien * 1159243Sobrien * Redistribution and use in source and binary forms, with or without 1259243Sobrien * modification, are permitted provided that the following conditions 1359243Sobrien * are met: 1459243Sobrien * 1. Redistributions of source code must retain the above copyright 1559243Sobrien * notice, this list of conditions and the following disclaimer. 1659243Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1759243Sobrien * notice, this list of conditions and the following disclaimer in the 1859243Sobrien * documentation and/or other materials provided with the distribution. 19100616Smp * 3. Neither the name of the University nor the names of its contributors 2059243Sobrien * may be used to endorse or promote products derived from this software 2159243Sobrien * without specific prior written permission. 2259243Sobrien * 2359243Sobrien * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2459243Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2559243Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2659243Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2759243Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2859243Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2959243Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3059243Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3159243Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3259243Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3359243Sobrien * SUCH DAMAGE. 3459243Sobrien */ 3559243Sobrien#include "sh.h" 3659243Sobrien 37145479SmpRCSID("$Id: tc.sched.c,v 3.21 2004/11/23 02:10:50 christos Exp $") 3859243Sobrien 3959243Sobrien#include "ed.h" 40100616Smp#include "tw.h" 4159243Sobrien#include "tc.h" 4259243Sobrien 4359243Sobrienextern int just_signaled; 4459243Sobrien 4559243Sobrienstruct sched_event { 4659243Sobrien struct sched_event *t_next; 4759243Sobrien time_t t_when; 4859243Sobrien Char **t_lex; 4959243Sobrien}; 5059243Sobrienstatic struct sched_event *sched_ptr = NULL; 5159243Sobrien 5259243Sobrien 5359243Sobrientime_t 5459243Sobriensched_next() 5559243Sobrien{ 5659243Sobrien if (sched_ptr) 5759243Sobrien return (sched_ptr->t_when); 5859243Sobrien return ((time_t) - 1); 5959243Sobrien} 6059243Sobrien 6159243Sobrien/*ARGSUSED*/ 6259243Sobrienvoid 6359243Sobriendosched(v, c) 64145479Smp Char **v; 6559243Sobrien struct command *c; 6659243Sobrien{ 67145479Smp struct sched_event *tp, *tp1, *tp2; 6859243Sobrien time_t cur_time; 6959243Sobrien int count, hours, minutes, dif_hour, dif_min; 7059243Sobrien Char *cp; 71145479Smp int relative; /* time specified as +hh:mm */ 7259243Sobrien struct tm *ltp; 7359243Sobrien 7459243Sobrien USE(c); 7559243Sobrien/* This is a major kludge because of a gcc linker */ 7659243Sobrien/* Problem. It may or may not be needed for you */ 7769408Sache#if defined(_MINIX) && !defined(_MINIX_VMD) 7859243Sobrien char kludge[10]; 7959243Sobrien extern char *sprintf(); 8059243Sobrien sprintf(kludge, CGETS(24, 1, "kludge")); 8169408Sache#endif /* _MINIX && !_MINIX_VMD */ 8259243Sobrien 8359243Sobrien v++; 8459243Sobrien cp = *v++; 8559243Sobrien if (cp == NULL) { 8659243Sobrien Char *fmt; 8759243Sobrien if ((fmt = varval(STRsched)) == STRNULL) 8859243Sobrien fmt = str2short("%h\t%T\t%R\n"); 8959243Sobrien /* print list of scheduled events */ 9059243Sobrien for (count = 1, tp = sched_ptr; tp; count++, tp = tp->t_next) { 9159243Sobrien Char buf[BUFSIZE], sbuf[BUFSIZE]; 9259243Sobrien blkexpand(tp->t_lex, buf); 9359243Sobrien tprintf(FMT_SCHED, sbuf, fmt, sizeof(sbuf), 9459243Sobrien short2str(buf), tp->t_when, (ptr_t) &count); 9559243Sobrien for (cp = sbuf; *cp;) 96145479Smp xputwchar(*cp++); 9759243Sobrien } 9859243Sobrien return; 9959243Sobrien } 10059243Sobrien 10159243Sobrien if (*cp == '-') { 10259243Sobrien /* remove item from list */ 10359243Sobrien if (!sched_ptr) 10459243Sobrien stderror(ERR_NOSCHED); 10559243Sobrien if (*v) 10659243Sobrien stderror(ERR_SCHEDUSAGE); 10759243Sobrien count = atoi(short2str(++cp)); 10859243Sobrien if (count <= 0) 10959243Sobrien stderror(ERR_SCHEDUSAGE); 11059243Sobrien tp = sched_ptr; 11159243Sobrien tp1 = 0; 11259243Sobrien while (--count) { 11359243Sobrien if (tp->t_next == 0) 11459243Sobrien break; 11559243Sobrien else { 11659243Sobrien tp1 = tp; 11759243Sobrien tp = tp->t_next; 11859243Sobrien } 11959243Sobrien } 12059243Sobrien if (count) 12159243Sobrien stderror(ERR_SCHEDEV); 12259243Sobrien if (tp1 == 0) 12359243Sobrien sched_ptr = tp->t_next; 12459243Sobrien else 12559243Sobrien tp1->t_next = tp->t_next; 12659243Sobrien blkfree(tp->t_lex); 12759243Sobrien xfree((ptr_t) tp); 12859243Sobrien return; 12959243Sobrien } 13059243Sobrien 13159243Sobrien /* else, add an item to the list */ 13259243Sobrien if (!*v) 13359243Sobrien stderror(ERR_SCHEDCOM); 13459243Sobrien relative = 0; 13559243Sobrien if (!Isdigit(*cp)) { /* not abs. time */ 13659243Sobrien if (*cp != '+') 13759243Sobrien stderror(ERR_SCHEDUSAGE); 13859243Sobrien cp++, relative++; 13959243Sobrien } 14059243Sobrien minutes = 0; 14159243Sobrien hours = atoi(short2str(cp)); 14259243Sobrien while (*cp && *cp != ':' && *cp != 'a' && *cp != 'p') 14359243Sobrien cp++; 14459243Sobrien if (*cp && *cp == ':') 14559243Sobrien minutes = atoi(short2str(++cp)); 14659243Sobrien if ((hours < 0) || (minutes < 0) || 14759243Sobrien (hours > 23) || (minutes > 59)) 14859243Sobrien stderror(ERR_SCHEDTIME); 14959243Sobrien while (*cp && *cp != 'p' && *cp != 'a') 15059243Sobrien cp++; 15159243Sobrien if (*cp && relative) 15259243Sobrien stderror(ERR_SCHEDREL); 15359243Sobrien if (*cp == 'p') 15459243Sobrien hours += 12; 15559243Sobrien (void) time(&cur_time); 15659243Sobrien ltp = localtime(&cur_time); 15759243Sobrien if (relative) { 15859243Sobrien dif_hour = hours; 15959243Sobrien dif_min = minutes; 16059243Sobrien } 16159243Sobrien else { 16259243Sobrien if ((dif_hour = hours - ltp->tm_hour) < 0) 16359243Sobrien dif_hour += 24; 16459243Sobrien if ((dif_min = minutes - ltp->tm_min) < 0) { 16559243Sobrien dif_min += 60; 16659243Sobrien if ((--dif_hour) < 0) 16759243Sobrien dif_hour = 23; 16859243Sobrien } 16959243Sobrien } 17059243Sobrien tp = (struct sched_event *) xcalloc(1, sizeof *tp); 17159243Sobrien#ifdef _SX 17259243Sobrien tp->t_when = cur_time - ltp->tm_sec + dif_hour * 3600 + dif_min * 60; 17359243Sobrien#else /* _SX */ 17459243Sobrien tp->t_when = cur_time - ltp->tm_sec + dif_hour * 3600L + dif_min * 60L; 17559243Sobrien#endif /* _SX */ 17659243Sobrien /* use of tm_sec: get to beginning of minute. */ 17759243Sobrien if (!sched_ptr || tp->t_when < sched_ptr->t_when) { 17859243Sobrien tp->t_next = sched_ptr; 17959243Sobrien sched_ptr = tp; 18059243Sobrien } 18159243Sobrien else { 18259243Sobrien tp1 = sched_ptr->t_next; 18359243Sobrien tp2 = sched_ptr; 18459243Sobrien while (tp1 && tp->t_when >= tp1->t_when) { 18559243Sobrien tp2 = tp1; 18659243Sobrien tp1 = tp1->t_next; 18759243Sobrien } 18859243Sobrien tp->t_next = tp1; 18959243Sobrien tp2->t_next = tp; 19059243Sobrien } 19159243Sobrien tp->t_lex = saveblk(v); 19259243Sobrien} 19359243Sobrien 19459243Sobrien/* 19559243Sobrien * Execute scheduled events 19659243Sobrien */ 19759243Sobrien/*ARGSUSED*/ 19859243Sobrienvoid 19959243Sobriensched_run(n) 20059243Sobrien int n; 20159243Sobrien{ 20259243Sobrien time_t cur_time; 203145479Smp struct sched_event *tp, *tp1; 20459243Sobrien struct wordent cmd, *nextword, *lastword; 20559243Sobrien struct command *t; 20659243Sobrien Char **v, *cp; 20759243Sobrien#ifdef BSDSIGS 20859243Sobrien sigmask_t omask; 20959243Sobrien 21059243Sobrien omask = sigblock(sigmask(SIGINT)) & ~sigmask(SIGINT); 21159243Sobrien#else 21259243Sobrien (void) sighold(SIGINT); 21359243Sobrien#endif 21459243Sobrien 21559243Sobrien USE(n); 21659243Sobrien 21759243Sobrien (void) time(&cur_time); 21859243Sobrien tp = sched_ptr; 21959243Sobrien 22059243Sobrien /* bugfix by: Justin Bur at Universite de Montreal */ 22159243Sobrien /* 22259243Sobrien * this test wouldn't be necessary if this routine were not called before 22359243Sobrien * each prompt (in sh.c). But it is, to catch missed alarms. Someone 22459243Sobrien * ought to fix it all up. -jbb 22559243Sobrien */ 22659243Sobrien if (!(tp && tp->t_when < cur_time)) { 22759243Sobrien#ifdef BSDSIGS 22859243Sobrien (void) sigsetmask(omask); 22959243Sobrien#else 23059243Sobrien (void) sigrelse(SIGINT); 23159243Sobrien#endif 23259243Sobrien return; 23359243Sobrien } 23459243Sobrien 23559243Sobrien if (GettingInput) 23659243Sobrien (void) Cookedmode(); 23759243Sobrien 23859243Sobrien while (tp && tp->t_when < cur_time) { 23959243Sobrien if (seterr) { 24059243Sobrien xfree((ptr_t) seterr); 24159243Sobrien seterr = NULL; 24259243Sobrien } 24359243Sobrien cmd.word = STRNULL; 24459243Sobrien lastword = &cmd; 24559243Sobrien v = tp->t_lex; 24659243Sobrien for (cp = *v; cp; cp = *++v) { 24759243Sobrien nextword = (struct wordent *) xcalloc(1, sizeof cmd); 24859243Sobrien nextword->word = Strsave(cp); 24959243Sobrien lastword->next = nextword; 25059243Sobrien nextword->prev = lastword; 25159243Sobrien lastword = nextword; 25259243Sobrien } 25359243Sobrien lastword->next = &cmd; 25459243Sobrien cmd.prev = lastword; 25559243Sobrien tp1 = tp; 25659243Sobrien sched_ptr = tp = tp1->t_next; /* looping termination cond: */ 25759243Sobrien blkfree(tp1->t_lex); /* straighten out in case of */ 25859243Sobrien xfree((ptr_t) tp1); /* command blow-up. */ 25959243Sobrien 26059243Sobrien /* expand aliases like process() does. */ 26159243Sobrien alias(&cmd); 26259243Sobrien /* build a syntax tree for the command. */ 26359243Sobrien t = syntax(cmd.next, &cmd, 0); 26459243Sobrien if (seterr) 26559243Sobrien stderror(ERR_OLD); 26659243Sobrien /* execute the parse tree. */ 267100616Smp execute(t, -1, NULL, NULL, TRUE); 26859243Sobrien /* done. free the lex list and parse tree. */ 26959243Sobrien freelex(&cmd), freesyn(t); 27059243Sobrien } 27159243Sobrien if (GettingInput && !just_signaled) { /* PWP */ 27259243Sobrien (void) Rawmode(); 27359243Sobrien ClearLines(); /* do a real refresh since something may */ 27459243Sobrien ClearDisp(); /* have printed to the screen */ 27559243Sobrien Refresh(); 27659243Sobrien } 27759243Sobrien just_signaled = 0; 27859243Sobrien 27959243Sobrien#ifdef BSDSIGS 28059243Sobrien (void) sigsetmask(omask); 28159243Sobrien#else 28259243Sobrien (void) sigrelse(SIGINT); 28359243Sobrien#endif 28459243Sobrien} 285