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/* Regression test for bugzilla 6850 */
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>
#define PASS_MARKER "./bz6850_pass"
/* All this in an attempt to defeat gcc's over-aggressive inlining... */
typedef pid_t (*forker)(int);
static forker call_chain[];
/*
* Both parent and child return from fork2() and fork1(). Both
* processes will hit the uretprobe trampolines. The handlers should
* run in the parent. With the bug fix in place, the child will return
* correctly and do the exec (but won't run the handlers).
*/
static pid_t fork2(int ignored)
{
return fork();
}
static pid_t fork1(int func_index)
{
++func_index;
return call_chain[func_index](func_index); /* fork2() */
}
static pid_t fork_and_exec2(int func_index)
{
pid_t child;
++func_index;
child = call_chain[func_index](func_index); /* fork1() */
if (child == 0) {
/* I'm the child. Create the marker file. */
char *child_args[] = { "/bin/touch", PASS_MARKER, NULL };
char *child_env[] = { NULL };
execve(child_args[0], child_args, child_env);
perror("execve");
fprintf(stderr, "FAIL: child couldn't exec.\n");
exit(2);
}
return child;
}
static pid_t fork_and_exec1(int func_index)
{
++func_index;
return call_chain[func_index](func_index); /* fork_and_exec2() */
}
static forker call_chain[] = {
fork_and_exec1,
fork_and_exec2,
fork1,
fork2,
NULL
};
main()
{
pid_t child, wait_child;
int status = 0;
(void) unlink(PASS_MARKER);
child = call_chain[0](0); /* fork_and_exec1() */
if (child < 0) {
fprintf(stderr, "FAIL: fork_and_exec1() failed.\n");
exit(1);
}
wait_child = wait(&status);
if (wait_child != child) {
fprintf(stderr, "FAIL: waited for %d but got %d\n",
child, wait_child);
exit(1);
}
if (WEXITSTATUS(status) != 0) {
fprintf(stderr, "FAIL: child died with status = %d\n",
WEXITSTATUS(status));
exit(1);
}
exit(0);
}
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