src/functional/popen.c

   1 #include <unistd.h>
   2 #include <stdio.h>
   3 #include <errno.h>
   4 #include <string.h>
   5 #include <signal.h>
   6 #include "test.h"
   7
   8 #define TEST(r, f, x, m) ( \
   9         ((r) = (f)) == (x) || (t_error("%s failed (" m ")\n", #f, r, x), 0) )
  10
  11 #define TEST_E(f) ( \
  12         (errno = 0), \
  13         (f) || (t_error("%s failed (errno = %d)\n", #f, errno), 0) )
  14
  15 #define TEST_S(s, x, m) ( \
  16         !strcmp((s),(x)) || \
  17                 (t_error("[%s] != [%s] (%s)\n", s, x, m), 0) )
  18
  19 static sig_atomic_t got_sig;
  20
  21 static void handler(int sig) {
  22         got_sig = 1;
  23 }
  24
  25 int main(void)
  26 {
  27         int i;
  28         char foo[6];
  29         char cmd[64];
  30         FILE *f;
  31
  32         TEST_E(f = popen("echo hello", "r"));
  33         if (f) {
  34                 TEST_E(fgets(foo, sizeof foo, f));
  35                 TEST_S(foo, "hello", "child process did not say hello");
  36                 TEST(i, pclose(f), 0, "exit status %04x != %04x");
  37         }
  38
  39         signal(SIGUSR1, handler);
  40         snprintf(cmd, sizeof cmd, "read a ; test \"x$a\" = xhello && kill -USR1 %d", getpid());
  41         TEST_E(f = popen(cmd, "w"));
  42         if (f) {
  43                 TEST_E(fputs("hello", f) >= 0);
  44                 TEST(i, pclose(f), 0, "exit status %04x != %04x");
  45                 TEST(i, got_sig, 1, "child process did not send signal");
  46         }
  47         signal(SIGUSR1, SIG_DFL);
  48         return t_status;
  49 }