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Kselftest fixes for Linux 4.0-rc4

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selftests/exec: Check if the syscall exists and bail if not
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Merge tag 'linux-kselftest-4.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull Kselftest fix from Shuah Khan:
 "selftests/exec: Check if the syscall exists and bail if not"

* tag 'linux-kselftest-4.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/exec: Check if the syscall exists and bail if not
This commit is contained in:
Linus Torvalds 2015-03-14 09:26:23 -07:00
commit e6c2d9ce12
1 changed files with 9 additions and 1 deletions
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10
tools/testing/selftests/exec/execveat.c
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@ -30,7 +30,7 @@ static int execveat_(int fd, const char *path, char **argv, char **envp,
#ifdef __NR_execveat
return syscall(__NR_execveat, fd, path, argv, envp, flags);
#else
errno = -ENOSYS;
errno = ENOSYS;
return -1;
#endif
}
@ -234,6 +234,14 @@ static int run_tests(void)
int fd_cloexec = open_or_die("execveat", O_RDONLY|O_CLOEXEC);
int fd_script_cloexec = open_or_die("script", O_RDONLY|O_CLOEXEC);
/* Check if we have execveat at all, and bail early if not */
errno = 0;
execveat_(-1, NULL, NULL, NULL, 0);
if (errno == ENOSYS) {
printf("[FAIL] ENOSYS calling execveat - no kernel support?\n");
return 1;
}
/* Change file position to confirm it doesn't affect anything */
lseek(fd, 10, SEEK_SET);