4.3BSD - /usr/src/new/nntp/support/mkgrdates.c

   1: #ifndef lint
   2: static char *sccsid = "%W%	(Berkeley) %G%";
   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/time.h>
  33: #include <sys/stat.h>
  34: #include "../common/conf.h"
  35: 
  36: #define MODE        0644    /* Better be readable by nntpd! */
  37: 
  38: extern  int linecmp();
  39: extern  char    *index(), *malloc(), *strcpy(), *strcat();
  40: 
  41: main(argc, argv)
  42: int argc;
  43: char    *argv[];
  44: {
  45:     char    *groups[MAX_GROUPS];
  46:     char    line[MAX_STRLEN], gr_name[MAX_STRLEN];
  47:     char    *cp;
  48:     int i, j;
  49:     long    lastsize, crntsize;
  50:     long    birthtime;
  51:     struct tm *tmptr;
  52:     FILE    *stat_fp, *active_fp, *date_fp;
  53:     long    birthof();
  54: 
  55:     stat_fp = fopen(STAT_FILE, "r");
  56: 
  57:     if (stat_fp != NULL) {
  58:         (void) fscanf(stat_fp, "%d", &lastsize);
  59:         (void) fclose(stat_fp);
  60:     }
  61: 
  62:     active_fp = fopen(ACTIVE_FILE, "r");
  63:     if (active_fp == NULL) {
  64:         fprintf(stderr, "Can't read active file?\n");
  65:         perror(ACTIVE_FILE);
  66:         exit(1);
  67:     }
  68: 
  69:     /* Check length; if it's the same as last time, quit */
  70: 
  71:     (void) fseek(active_fp, (long) 0, 2);
  72:     crntsize = ftell(active_fp);
  73:     if (crntsize == lastsize) {
  74:         (void) fclose(active_fp);
  75:         exit(0);
  76:     }
  77: 
  78:     /* Ok, time to rebuild the date file */
  79: 
  80:     date_fp = fopen(NGDATE_FILE, "w");
  81: 
  82:     if (date_fp == NULL) {
  83:         perror(NGDATE_FILE);
  84:         (void) fclose(active_fp);
  85:         exit(1);
  86:     }
  87: 
  88:     rewind(active_fp);
  89: 
  90:     i = 0;
  91:     while (fgets(line, sizeof(line), active_fp) != NULL) {
  92:         if ((cp = index(line, ' ')) != NULL)
  93:             *cp = '\0';
  94:         (void) strcpy(gr_name, line);
  95:         birthtime = birthof(line, atoi(cp + 1));
  96: 
  97:         if (birthtime == 0) /* Skip ancient newsgroups */
  98:             continue;
  99: 
 100:         (void) sprintf(line, "%ld %s", birthtime, gr_name);
 101:         groups[i] = malloc(strlen(line)+1);
 102:         if (groups[i] != NULL)
 103:             (void) strcpy(groups[i++], line);
 104:         else {
 105:             perror("malloc");
 106:             exit(1);
 107:         }
 108:     }
 109: 
 110:     (void) fclose(active_fp);
 111: 
 112:     qsort((char *) groups, i, sizeof(char *), linecmp);
 113: 
 114:     for (j = 0; j < i; ++j)
 115:         fprintf(date_fp, "%s\n", groups[j]);
 116: 
 117:     (void) fclose(date_fp);
 118: 
 119:     (void) chmod(NGDATE_FILE, MODE);
 120: 
 121:     stat_fp = fopen(STAT_FILE, "w");
 122:     if (stat_fp == NULL) {
 123:         perror(STAT_FILE);
 124:         exit(1);
 125:     }
 126: 
 127:     fprintf(stat_fp, "%d\n", crntsize);
 128: 
 129:     (void) fclose(stat_fp);
 130: 
 131:     (void) chmod(STAT_FILE, MODE);
 132: 
 133:     exit(0);
 134: }
 135: 
 136: linecmp(line1, line2)
 137: char     **line1, **line2;
 138: {
 139:     return(0 - strcmp(*line1, *line2));
 140: }
 141: 
 142: 
 143: /* return creation time of newsgroup */
 144: 
 145: long
 146: birthof(group, highart)
 147: char    *group;
 148: int highart;
 149: {
 150:     char    *cp, *index();
 151:     char    tst[128];
 152:     struct stat statbuf;
 153: 
 154:     while ((cp = index(group, '.')))
 155:         *cp = '/';
 156: 
 157:     (void) strcpy(tst, SPOOLDIR);
 158:     (void) strcat(tst, group);
 159:     if (highart)
 160:         (void) strcat(tst, "/1");
 161:     if (stat(tst, &statbuf) < 0)
 162:         return 0L;      /* not there, assume ancient */
 163:     else
 164:         return(statbuf.st_mtime);
 165: }

Defined functions

Defined variables

Defined macros