libio/dbz/fake.c

   1 /*
   2  * fake - make up random lines resembling history-file entries, reproducibly
   3  *
   4  * -Log-
   5  */
   6
   7 #include <stdio.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <string.h>
  11
  12 #define MAXSTR  500             /* For sizing strings -- DON'T use BUFSIZ! */
  13 #define STREQ(a, b)     (*(a) == *(b) && strcmp((a), (b)) == 0)
  14
  15 #ifndef lint
  16 static char RCSid[] = "$Header: /rel/cvsfiles/devo/libio/dbz/fake.c,v 1.2 1993/10/25 20:02:42 bothner Exp $";
  17 #endif
  18
  19 int midonly = 0;                /* just message ids, rest not realistic */
  20 int tag = 0;                    /* tag lines with random digit for later use */
  21 int expired = -1;               /* percentage of lines to be expired */
  22
  23 int debug = 0;
  24 char *progname;
  25
  26 char *inname;                           /* filename for messages etc. */
  27 long lineno;                            /* line number for messages etc. */
  28
  29 void doline();
  30 void addchars();
  31 void seed();
  32
  33 /*
  34  - main - parse arguments and handle options
  35  */
  36 int
  37 main(argc, argv)
  38 int argc;
  39 char *argv[];
  40 {
  41         int c;
  42         int errflg = 0;
  43         FILE *in;
  44         struct stat statbuf;
  45         extern int optind;
  46         extern char *optarg;
  47         void process();
  48         register long no;
  49         extern long atol();
  50         char line[MAXSTR];
  51
  52         progname = argv[0];
  53
  54         while ((c = getopt(argc, argv, "ms:te:d")) != EOF)
  55                 switch (c) {
  56                 case 'm':       /* message-ids only */
  57                         midonly = 1;
  58                         break;
  59                 case 's':       /* seed */
  60                         seed(atol(optarg));
  61                         break;
  62                 case 't':       /* tag lines with a random digit */
  63                         tag = 1;
  64                         break;
  65                 case 'e':       /* percentage to be expired */
  66                         expired = atoi(optarg);
  67                         break;
  68                 case 'd':       /* Debugging. */
  69                         debug++;
  70                         break;
  71                 case '?':
  72                 default:
  73                         errflg++;
  74                         break;
  75                 }
  76         if (errflg || optind != argc - 1) {
  77                 fprintf(stderr, "usage: %s ", progname);
  78                 fprintf(stderr, "[-m] [-s seed] length\n");
  79                 exit(2);
  80         }
  81
  82         for (no = atol(argv[optind]); no > 0; no--) {
  83                 doline(line);
  84                 puts(line);
  85         }
  86 #ifdef DBZ_FINISH
  87         DBZ_FINISH;
  88 #endif
  89         exit(0);
  90 }
  91
  92 /*
  93  - doline - generate random history pseudo-line
  94  */
  95 void
  96 doline(buf)
  97 char *buf;
  98 {
  99         char tagch[2];
 100
 101         (void) strcpy(buf, "<");
 102         addchars(buf, range(4, 20));
 103         (void) strcat(buf, "@");
 104         addchars(buf, range(8, 20));
 105         if (midonly)
 106                 (void) strcat(buf, ">\tx");
 107         else {
 108                 if (tag) {
 109                         tagch[0] = "1234567890"[range(0,9)];
 110                         tagch[1] = '\0';
 111                         (void) strcat(buf, ">\t");
 112                         (void) strcat(buf, tagch);
 113                         (void) strcat(buf, "00000000~-");
 114                 } else
 115                         (void) strcat(buf, ">\t1234567890~-");
 116         }
 117         if (range(1, 100) > expired) {
 118                 if (midonly)
 119                         (void) strcat(buf, "\tx");
 120                 else {
 121                         (void) strcat(buf, "\t");
 122                         addchars(buf, range(10, 30));
 123                 }
 124         }
 125 }
 126
 127 /*
 128  - addchars - generate n random characters suitable for history file
 129  */
 130 void
 131 addchars(buf, len)
 132 char *buf;
 133 int len;
 134 {
 135         register int i;
 136         register char *p = buf + strlen(buf);
 137         static char vocab[] = "1234567890.abcde.fghij.klmno.pqrst.uvwxyz.\
 138 1234567890.ABCDE.FGHIJ.KLMNO.PQRST.UVWXYZ.1234567890.\
 139 1234567890.abcde.fghij.klmno.pqrst.uvwxyz.1234567890";
 140
 141         for (i = len; i > 0; i--)
 142                 *p++ = vocab[range(0, sizeof(vocab)-2)];
 143         *p++ = '\0';
 144 }