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#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#define TEST(r, f, x, m) ( \
((r) = (f)) == (x) || \
(printf(__FILE__ ":%d: %s failed (" m ")\n", __LINE__, #f, r, x), err++, 0) )
#define TEST_E(f) ( (errno = 0), (f) || \
(printf(__FILE__ ":%d: %s failed (errno = %d)\n", __LINE__, #f, errno), err++, 0) )
#define TEST_S(s, x, m) ( \
!strcmp((s),(x)) || \
(printf(__FILE__ ":%d: [%s] != [%s] (%s)\n", __LINE__, s, x, m), err++, 0) )
static sig_atomic_t got_sig;
static void handler(int sig)
{
got_sig = 1;
}
int main(void)
{
int i;
char foo[6];
char cmd[64];
int err = 0;
FILE *f;
TEST_E(f = popen("echo hello", "r"));
TEST_E(fgets(foo, sizeof foo, f));
TEST_S(foo, "hello", "child process did not say hello");
TEST(i, pclose(f), 0, "exit status %04x != %04x");
signal(SIGUSR1, handler);
snprintf(cmd, sizeof cmd, "read a ; test \"x$a\" = xhello && kill -USR1 %d", getpid());
TEST_E(f = popen(cmd, "w"));
TEST_E(fputs("hello", f) >= 0);
TEST(i, pclose(f), 0, "exit status %04x != %04x");
signal(SIGUSR1, SIG_DFL);
TEST(i, got_sig, 1, "child process did not send signal (%i!=%i)");
return err;
}
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