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Annotation of 3BSD/cmd/atrun.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Run programs submitted by at.
                      3:  */
                      4: #include <stdio.h>
                      5: #include <sys/types.h>
                      6: #include <sys/dir.h>
                      7: #include <time.h>
                      8: #include <sys/stat.h>
                      9: 
                     10: # define DIR "/usr/spool/at"
                     11: # define PDIR  "past"
                     12: # define LASTF "/usr/spool/at/lasttimedone"
                     13: 
                     14: int    nowtime;
                     15: int    nowdate;
                     16: int    nowyear;
                     17: 
                     18: main(argc, argv)
                     19: char **argv;
                     20: {
                     21:        int tt, day, year, uniq;
                     22:        struct direct dirent;
                     23:        FILE *dirf;
                     24: 
                     25:        setuid(0);
                     26:        setgid(0);
                     27:        chdir(DIR);
                     28:        makenowtime();
                     29:        if ((dirf = fopen(".", "r")) == NULL) {
                     30:                fprintf(stderr, "Cannot read at directory\n");
                     31:                exit(1);
                     32:        }
                     33:        while (fread((char *)&dirent, sizeof(dirent), 1, dirf) == 1) {
                     34:                if (dirent.d_ino==0)
                     35:                        continue;
                     36:                if (sscanf(dirent.d_name, "%2d.%3d.%4d.%2d", &year, &day, &tt, &uniq) != 4)
                     37:                        continue;
                     38:                if (nowyear < year)
                     39:                        continue;
                     40:                if (nowyear==year && nowdate < day)
                     41:                        continue;
                     42:                if (nowyear==year && nowdate==day && nowtime < tt)
                     43:                        continue;
                     44:                run(dirent.d_name);
                     45:        }
                     46:        fclose(dirf);
                     47:        updatetime(nowtime);
                     48:        exit(0);
                     49: }
                     50: 
                     51: makenowtime()
                     52: {
                     53:        long t;
                     54:        struct tm *localtime();
                     55:        register struct tm *tp;
                     56: 
                     57:        time(&t);
                     58:        tp = localtime(&t);
                     59:        nowtime = tp->tm_hour*100 + tp->tm_min;
                     60:        nowdate = tp->tm_yday;
                     61:        nowyear = tp->tm_year;
                     62: }
                     63: 
                     64: updatetime(t)
                     65: {
                     66:        FILE *tfile;
                     67: 
                     68:        tfile = fopen(LASTF, "w");
                     69:        if (tfile == NULL) {
                     70:                fprintf(stderr, "can't write lastfile\n");
                     71:                exit(1);
                     72:        }
                     73:        fprintf(tfile, "%04d\n", t);
                     74: }
                     75: 
                     76: run(file)
                     77: char *file;
                     78: {
                     79:        struct stat stbuf;
                     80:        register pid, i;
                     81:        char sbuf[64];
                     82: 
                     83:        /* printf("running %s\n", file); */
                     84:        if (fork()!=0)
                     85:                return;
                     86:        for (i=0; i<15; i++)
                     87:                close(i);
                     88:        dup(dup(open("/dev/null", 0)));
                     89:        sprintf(sbuf, "/bin/mv %.14s %s", file, PDIR);
                     90:        system(sbuf);
                     91:        chdir(PDIR);
                     92:        if (stat(file, &stbuf) == -1)
                     93:                exit(1);
                     94:        if (pid = fork()) {
                     95:                if (pid == -1)
                     96:                        exit(1);
                     97:                wait((int *)0);
                     98:                unlink(file);
                     99:                exit(0);
                    100:        }
                    101:        setgid(stbuf.st_gid);
                    102:        setuid(stbuf.st_uid);
                    103:        nice(3);
                    104:        execl("/bin/sh", "sh", file, 0);
                    105:        execl("/usr/bin/sh", "sh", file, 0);
                    106:        fprintf(stderr, "Can't execl shell\n");
                    107:        exit(1);
                    108: }

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