2.11BSD#431 - /usr/src/new/nntp/support/mkgrdates.c

   1: #ifndef lint
   2: static char *sccsid = "@(#)mkgrdates.c	1.4	(Berkeley) 2/6/88";
   3: #endif
   4: 
   5: /*
   6:  * Make a list of newsgroups which are "new" in the file NGDATE_FILE.
   7:  * "New" means having an entry in the active file, and having
   8:  * a message numbered "1" in the appropriate news directory.
   9:  * Since this involves a stat of all the newsgroups, we try
  10:  * to be intelligent about things -- if the active file's size
  11:  * since we last ran -- stored in STAT_FILE -- hasn't changed
  12:  * since last time, we assume things are ok, and exit without
  13:  * doing anything.  This could fail in extreme circumstances,
  14:  * but is "too painful to do right".
  15:  *
  16:  * Output in NGDATE_FILE is of the form
  17:  *
  18:  *	date newsgroup
  19:  *
  20:  * where "date" is the date the newsgroup was created, expressed as
  21:  * the number of seconds since 000000 Jan 1, 1970, GMT.  This file
  22:  * winds up sorted in cronological order.
  23:  *
  24:  *	Phil Lapsley
  25:  *	College of Engineering
  26:  *	University of California, Berkeley
  27:  *	(ARPA: phil@Berkeley.ARPA; UUCP: ...!ucbvax!phil)
  28:  */
  29: 
  30: #include <stdio.h>
  31: #include <sys/types.h>
  32: #include <sys/stat.h>
  33: #include "../common/conf.h"
  34: #ifdef USG
  35: #include <time.h>
  36: #else not USG
  37: #include <sys/time.h>
  38: #endif not USG
  39: 
  40: #define MODE        0644    /* Better be readable by nntpd! */
  41: 
  42: #ifndef MAXPATHLEN
  43: #define MAXPATHLEN  1024
  44: #endif
  45: 
  46: #ifndef MAXGROUPLEN
  47: #define MAXGROUPLEN 256
  48: #endif
  49: 
  50: extern  int linecmp();
  51: extern  char    *index(), *malloc(), *strcpy(), *strcat();
  52: 
  53: main(argc, argv)
  54: int argc;
  55: char    *argv[];
  56: {
  57:     char    *groups[1024];      /* XXX 1024 groups max */
  58:     char    line[MAXPATHLEN], gr_name[MAXGROUPLEN];
  59:     char    *cp;
  60:     int i, j;
  61:     long    lastsize, crntsize;
  62:     long    birthtime;
  63:     struct tm *tmptr;
  64:     FILE    *stat_fp, *active_fp, *date_fp;
  65:     long    birthof();
  66: 
  67:     stat_fp = fopen(STAT_FILE, "r");
  68: 
  69:     if (stat_fp != NULL) {
  70:         (void) fscanf(stat_fp, "%d", &lastsize);
  71:         (void) fclose(stat_fp);
  72:     }
  73: 
  74:     active_fp = fopen(ACTIVE_FILE, "r");
  75:     if (active_fp == NULL) {
  76:         fprintf(stderr, "Can't read active file?\n");
  77:         perror(ACTIVE_FILE);
  78:         exit(1);
  79:     }
  80: 
  81:     /* Check length; if it's the same as last time, quit */
  82: 
  83:     (void) fseek(active_fp, (long) 0, 2);
  84:     crntsize = ftell(active_fp);
  85:     if (crntsize == lastsize) {
  86:         (void) fclose(active_fp);
  87:         exit(0);
  88:     }
  89: 
  90:     /* Ok, time to rebuild the date file */
  91: 
  92:     date_fp = fopen(NGDATE_FILE, "w");
  93: 
  94:     if (date_fp == NULL) {
  95:         perror(NGDATE_FILE);
  96:         (void) fclose(active_fp);
  97:         exit(1);
  98:     }
  99: 
 100:     rewind(active_fp);
 101: 
 102:     i = 0;
 103:     while (fgets(line, sizeof(line), active_fp) != NULL) {
 104:         if ((cp = index(line, ' ')) != NULL)
 105:             *cp = '\0';
 106:         (void) strcpy(gr_name, line);
 107:         birthtime = birthof(line, atoi(cp + 1));
 108: 
 109:         if (birthtime == 0) /* Skip ancient newsgroups */
 110:             continue;
 111: 
 112:         (void) sprintf(line, "%ld %s", birthtime, gr_name);
 113:         groups[i] = malloc(strlen(line)+1);
 114:         if (groups[i] != NULL)
 115:             (void) strcpy(groups[i++], line);
 116:         else {
 117:             perror("malloc");
 118:             exit(1);
 119:         }
 120:     }
 121: 
 122:     (void) fclose(active_fp);
 123: 
 124:     qsort((char *) groups, i, sizeof(char *), linecmp);
 125: 
 126:     for (j = 0; j < i; ++j)
 127:         fprintf(date_fp, "%s\n", groups[j]);
 128: 
 129:     (void) fclose(date_fp);
 130: 
 131:     (void) chmod(NGDATE_FILE, MODE);
 132: 
 133:     stat_fp = fopen(STAT_FILE, "w");
 134:     if (stat_fp == NULL) {
 135:         perror(STAT_FILE);
 136:         exit(1);
 137:     }
 138: 
 139:     fprintf(stat_fp, "%d\n", crntsize);
 140: 
 141:     (void) fclose(stat_fp);
 142: 
 143:     (void) chmod(STAT_FILE, MODE);
 144: 
 145:     exit(0);
 146: }
 147: 
 148: linecmp(line1, line2)
 149: char     **line1, **line2;
 150: {
 151:     return(0 - strcmp(*line1, *line2));
 152: }
 153: 
 154: 
 155: /* return creation time of newsgroup */
 156: 
 157: long
 158: birthof(group, highart)
 159: char    *group;
 160: int highart;
 161: {
 162:     char    *cp, *index();
 163:     char    tst[128];
 164:     struct stat statbuf;
 165: 
 166:     while ((cp = index(group, '.')))
 167:         *cp = '/';
 168: 
 169:     (void) strcpy(tst, SPOOLDIR);
 170:     (void) strcat(tst, group);
 171:     if (highart)
 172:         (void) strcat(tst, "/1");
 173:     if (stat(tst, &statbuf) < 0)
 174:         return 0L;      /* not there, assume ancient */
 175:     else
 176:         return(statbuf.st_mtime);
 177: }

Defined functions

Defined variables

Defined macros