mirror of
https://github.com/GnoConsortium/gno.git
synced 2025-01-06 19:30:34 +00:00
325 lines
6.8 KiB
C
325 lines
6.8 KiB
C
/* Converted to use syslog() by Phillip Vandry
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#define NO_SYSLOG to get the old version */
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#pragma stacksize 768
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#pragma optimize -1
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <gno/gno.h>
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#include <ctype.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <time.h>
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#include <sys/syslog.h>
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#include "pathnames.h"
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#define DEBUG(x)
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/* #define DEBUG(x) x */
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#define MAX_INTLIST 10
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#define IT_ITEM 0
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#define IT_RANGE 1
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#define IT_LIST 2
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#define IT_ALL 3
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#ifdef __ORCAC__
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#define NL 13
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#else
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#define NL 10
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#endif
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typedef struct intlist {
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int itype;
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int count;
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int intarr[MAX_INTLIST];
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} intlist;
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typedef struct ctentry {
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struct ctentry *next;
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intlist minute;
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intlist hour;
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intlist day;
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intlist month;
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intlist weekday;
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char *user;
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char *cmd;
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} ctentry;
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struct ctentry *crontab = NULL;
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#ifdef NO_SYSLOG
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FILE *cl;
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void cronlog(char *s)
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{
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time_t t;
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char *s1;
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time(&t);
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s1 = ctime(&t);
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s1[strlen(s1)-1] = 0;
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fprintf(cl,"%s: %s\n",s1,s);
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}
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#endif
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void disposecrontab(void)
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{
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struct ctentry *x = crontab,*x2;
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while (x) {
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free(x->user);
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free(x->cmd);
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x2 = x->next;
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free(x);
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x = x2;
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}
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crontab = NULL;
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}
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char rcbuf[256];
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int scanws(int i)
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{
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while (!(isspace(rcbuf[i]))) i++;
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while (isspace(rcbuf[i])) i++;
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return i;
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}
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int scan2ws(int i)
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{
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while ( !( isspace(rcbuf[i++]) ) );
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return i;
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}
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int scandig(int i)
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{
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while ( isdigit(rcbuf[i])) i++;
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return i;
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}
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int parseItem(int ind, struct intlist *i)
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{
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int nind;
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int count;
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if (rcbuf[ind] == '*')
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i->itype = IT_ALL;
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else {
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i->itype = IT_ITEM;
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sscanf(rcbuf+ind,"%d",&i->intarr[0]);
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nind = scandig(ind);
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if (rcbuf[nind] == ',') {
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ind = nind;
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count = 1;
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while (rcbuf[ind] == ',') {
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sscanf(rcbuf+ind+1,"%d",&i->intarr[count]);
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ind = scandig(ind+1);
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count++;
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}
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i->itype = IT_LIST;
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i->count = count;
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}
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else if (rcbuf[nind] == '-') {
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sscanf(rcbuf+nind+1,"%d",&i->intarr[1]);
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ind = nind;
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i->itype = IT_RANGE;
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}
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}
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return scanws(ind);
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}
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void readcrontab(void)
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{
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FILE *ct;
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ctentry *n;
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int ind,nind;
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if (crontab) disposecrontab();
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retry:
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ct = fopen(PATH_crontab,"r");
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if (ct == NULL) {
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#ifndef NO_SYSLOG
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syslog(LOG_ERR, "couldn't open crontab");
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#else
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perror("couldn't open crontab");
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cronlog("couldn't open crontab");
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#endif
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sleep(30);
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goto retry;
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}
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while (!feof(ct)) {
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if (fgets(rcbuf,255,ct) == NULL) break;
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DEBUG(fprintf(stderr,"gotline %s",rcbuf));
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if (rcbuf[0] == '#') continue;
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if (strlen(rcbuf) < 2) continue;
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rcbuf[strlen(rcbuf)-1] = 0;
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n = malloc(sizeof(ctentry));
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if (crontab) n->next = crontab;
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else n->next = NULL;
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crontab = n;
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ind = parseItem(0,&n->minute);
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ind = parseItem(ind,&n->hour);
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ind = parseItem(ind,&n->day);
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ind = parseItem(ind,&n->month);
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ind = parseItem(ind,&n->weekday);
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nind = scan2ws(ind);
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n->user = malloc(nind-ind+1);
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memcpy(n->user,rcbuf+ind,nind-ind);
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n->user[nind-ind] = 0;
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ind = scanws(ind);
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n->cmd = malloc(strlen(rcbuf)-ind+1);
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strcpy(n->cmd,rcbuf+ind);
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for (ind = 0; ind < strlen(n->cmd); ind++)
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if (n->cmd[ind] == '%') n->cmd[ind] = NL;
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rcbuf[0] = rcbuf[1] = 0;
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}
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fclose(ct);
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}
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int matchItem(struct intlist *i,int t)
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{
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int p;
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if (i->itype == IT_ALL) return 1;
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else if (i->itype == IT_ITEM) {
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if (t == i->intarr[0]) return 1;
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else return 0;
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}
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else if (i->itype == IT_RANGE) {
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if ((t >= i->intarr[0]) && (t <= i->intarr[1]))
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return 1;
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else return 0;
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}
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else if (i->itype == IT_LIST) {
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for (p = 0; p < i->count; p++)
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if (i->intarr[p] == t) return 1;
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return 0;
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}
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}
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int matchTime(ctentry *x,struct tm *t)
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{
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if (matchItem(&x->minute,t->tm_min) &&
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matchItem(&x->hour,t->tm_hour) &&
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matchItem(&x->day,t->tm_mday) &&
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matchItem(&x->month,t->tm_mon) /* &&
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matchItem(&x->weekday,t->tm_wday) */ )
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return 1;
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return 0;
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}
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void printItem(struct intlist *i)
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{
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int p;
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if (i->itype == IT_ALL) fprintf(stderr,"* ");
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else if (i->itype == IT_ITEM)
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fprintf(stderr,"%d ",i->intarr[0]);
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else if (i->itype == IT_RANGE)
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fprintf(stderr,"%d-%d",i->intarr[0],i->intarr[1]);
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else if (i->itype == IT_LIST) {
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fprintf(stderr,"%d",i->intarr[0]);
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for (p = 1; p < i->count; p++)
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fprintf(stderr,",%d",i->intarr[p]);
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}
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}
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void docrontab(void)
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{
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struct tm *t;
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time_t t1;
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ctentry *x = crontab;
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char *cmdpath;
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word ind = 0;
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t1 = time(NULL);
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t = localtime(&t1);
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if (x == NULL) { /* syslog(LOG_NOTICE, "crontab empty");*/ return; }
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while (x) {
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DEBUG(printItem(&x->minute));
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DEBUG(printItem(&x->hour));
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DEBUG(printItem(&x->day));
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DEBUG(printItem(&x->month));
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DEBUG(printItem(&x->weekday));
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DEBUG(fprintf(stderr,":%s \n",x->cmd));
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if (matchTime(x,t)) {
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DEBUG(fprintf(stderr,"matched!\n"));
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ind = strpos(x->cmd,' ');
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if (ind == -1) ind = strlen(x->cmd);
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cmdpath = malloc(ind+1);
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memcpy(cmdpath,x->cmd,ind);
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cmdpath[ind] = 0;
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exec(cmdpath,x->cmd);
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}
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x = x->next;
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}
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}
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int main(int argc, char *argv[])
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{
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time_t ct_mod,start_time;
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unsigned int i;
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struct tm *exptime;
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static struct stat sb;
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int sl;
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/* Previously this was a for. ORCA/C didn't compile that right, though.
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This generates more efficient code anyway */
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i = 3;
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while (++i < 20) close(i);
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#ifndef NO_SYSLOG
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openlog(NULL, 0, LOG_CRON);
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#else
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cl = fopen(PATH_cronlog,"a");
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if (!cl) {
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perror("cron: couldn't open cronlog file");
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exit(1);
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}
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#endif
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/* turn off buffering so cronlog is up-to-date in the event of a
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* system crash
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*/
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#ifdef NO_SYSLOG
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setvbuf(cl,NULL,_IONBF,0l);
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cronlog("cron started up");
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#else
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syslog(LOG_INFO, "cron started up");
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#endif
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/*
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* start cron sessions on or near an exact minute
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* (giving 2 seconds leeway for 'bounce')
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*/
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start_time = time(NULL);
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exptime = localtime(&start_time);
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sleep(62 - exptime->tm_sec);
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#pragma optimize 0 /* ORCA/C has problems... */
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ct_mod = 0l;
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while (1) {
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DEBUG(fprintf(stderr,"loop\n"));
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stat(PATH_crontab,&sb);
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if (sb.st_mtime != ct_mod) {
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ct_mod = sb.st_mtime;
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readcrontab();
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}
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#pragma optimize 1
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docrontab();
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/*
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* account for the time we spent loading/parsing/executing
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*/
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start_time = time(NULL);
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exptime = localtime(&start_time);
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sl = 61-exptime->tm_sec;
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/*while (sl < 0) sl+=60;*/
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DEBUG(fprintf(stderr,"sleep: %d\n",sl));
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sleep(sl);
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}
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}
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