stdio-common/tst-popen2.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <unistd.h>
   4
   5 static int
   6 do_test (void)
   7 {
   8   int fd = dup (fileno (stdout));
   9   if (fd <= 1)
  10     {
  11       puts ("dup failed");
  12       return 1;
  13     }
  14
  15   FILE *f1 = fdopen (fd, "w");
  16   if (f1 == NULL)
  17     {
  18       printf ("fdopen failed: %m\n");
  19       return 1;
  20     }
  21
  22   fclose (stdout);
  23
  24   FILE *f2 = popen ("echo test1", "r");
  25   if (f2 == NULL)
  26     {
  27       fprintf (f1, "1st popen failed: %m\n");
  28       return 1;
  29     }
  30   FILE *f3 = popen ("echo test2", "r");
  31   if (f2 == NULL || f3 == NULL)
  32     {
  33       fprintf (f1, "2nd popen failed: %m\n");
  34       return 1;
  35     }
  36
  37   char *line = NULL;
  38   size_t len = 0;
  39   int result = 0;
  40   if (getline (&line, &len, f2) != 6)
  41     {
  42       fputs ("could not read line from 1st popen\n", f1);
  43       result = 1;
  44     }
  45   else if (strcmp (line, "test1\n") != 0)
  46     {
  47       fprintf (f1, "read \"%s\"\n", line);
  48       result = 1;
  49     }
  50
  51   if (getline (&line, &len, f2) != -1)
  52     {
  53       fputs ("second getline did not return -1\n", f1);
  54       result = 1;
  55     }
  56
  57   if (getline (&line, &len, f3) != 6)
  58     {
  59       fputs ("could not read line from 2nd popen\n", f1);
  60       result = 1;
  61     }
  62   else if (strcmp (line, "test2\n") != 0)
  63     {
  64       fprintf (f1, "read \"%s\"\n", line);
  65       result = 1;
  66     }
  67
  68   if (getline (&line, &len, f3) != -1)
  69     {
  70       fputs ("second getline did not return -1\n", f1);
  71       result = 1;
  72     }
  73
  74   int ret = pclose (f2);
  75   if (ret != 0)
  76     {
  77       fprintf (f1, "1st pclose returned %d\n", ret);
  78       result = 1;
  79     }
  80
  81   ret = pclose (f3);
  82   if (ret != 0)
  83     {
  84       fprintf (f1, "2nd pclose returned %d\n", ret);
  85       result = 1;
  86     }
  87
  88   return result;
  89 }
  90
  91 #define TEST_FUNCTION do_test ()
  92 #include "../test-skeleton.c"