pee.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3
   4 /* Licensed under the GPL
   5  * Copyright (c) Miek Gieben, 2006
   6  */
   7
   8 /* like tee(1), but then connect to other programs using
   9  * pipes _and_ output to standard output
  10  */
  11
  12 void
  13 close_pipes(FILE **p, size_t i)
  14 {
  15         size_t j;
  16         for (j = 0; j < i; j++)
  17                 pclose(p[j]);
  18 }
  19
  20 int
  21 main(int argc, char **argv) {
  22         size_t i, r;
  23         FILE **pipes;
  24         char buf[BUFSIZ];
  25
  26         pipes = malloc(((argc - 1) * sizeof *pipes));
  27         if (!pipes)
  28                 exit(EXIT_FAILURE);
  29
  30         for (i = 1; i < argc; i++) {
  31                 pipes[i - 1] = popen(argv[i], "w");
  32                 if (!pipes[i - 1]) {
  33                         fprintf(stderr, "Can not open pipe to '%s\'\n", argv[i]);
  34                         close_pipes(pipes, i);
  35
  36                         exit(EXIT_FAILURE);
  37                 }
  38         }
  39         argc--;
  40
  41         while(!feof(stdin) && (!ferror(stdin))) {
  42                 r = fread(buf, sizeof(char), BUFSIZ, stdin);
  43                 for(i = 0; i < argc; i++) {
  44                         if (fwrite(buf, sizeof(char), r, pipes[i]) != r) {
  45                                 fprintf(stderr, "Write error to `%s\'\n", argv[i + 1]);
  46                                 close_pipes(pipes, i);
  47                                 exit(EXIT_FAILURE);
  48                         }
  49                 }
  50         }
  51         close_pipes(pipes, argc);
  52
  53         exit(EXIT_SUCCESS);
  54 }