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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main(int argc, char **argv)
{
if (argc == 1)
{
// This tests the case where argv and envp are NULL, which is easy to
// get wrong because it's an unusual case. It is also bad and only
// "worked" by accident with the linux kernel.
char *const argv_exe[] = {"true", NULL};
char *const v_null[] = { NULL };
char *const v_minus_one[] = { (char *const) -1, NULL };
#if defined(VGO_solaris)
const char *exe = "/bin/true";
#elif defined(VGO_darwin)
const char *exe = "/usr/bin/true";
#elif defined(VGO_freebsd)
const char *exe = "/usr/bin/true";
#else
const char *exe = "/bin/true";
#endif
/* Try some bad argv and envp arguments, make sure the executable
doesn't actually exists, so execve doesn't accidentally succeeds. */
if (execve("/%/", NULL, NULL) >= 0)
printf ("WHAT?");
if (execve("/%/", (void *)-1, NULL) >= 0)
printf ("WHAT?");
if (execve("/%/", v_null, NULL) >= 0)
printf ("WHAT?");
if (execve("/%/", v_null, v_null) >= 0)
printf ("WHAT?");
if (execve("/%/", v_minus_one, NULL) >= 0)
printf ("WHAT?");
if (execve("/%/", v_minus_one, v_null) >= 0)
printf ("WHAT?");
if (execve("/%/", v_minus_one, v_minus_one) >= 0)
printf ("WHAT?");
/* Finally a correct execve. */
if (execve(exe, argv_exe, NULL) < 0)
{
perror("execve");
exit(1);
}
}
exit(0);
}
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