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authorUlrich Drepper <drepper@redhat.com>2000-05-29 01:00:03 +0000
committerUlrich Drepper <drepper@redhat.com>2000-05-29 01:00:03 +0000
commit31eb0a91a52a5b67564cf38e79f1f01930a28ed5 (patch)
treebdce53e1495345eb7ee708025c3b7f82772dbf28 /posix/tst-fork.c
parent84838b8ff3dc3f826d6c78e25f4e144adea4babe (diff)
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Update.
2000-05-28 Ulrich Drepper <drepper@redhat.com> * sysdeps/arm/atomicity.h (compare_and_swap): Return result.
Diffstat (limited to 'posix/tst-fork.c')
-rw-r--r--posix/tst-fork.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/posix/tst-fork.c b/posix/tst-fork.c
index 287fa5f..0bee14f 100644
--- a/posix/tst-fork.c
+++ b/posix/tst-fork.c
@@ -38,6 +38,7 @@ main (void)
char *name;
int fd;
pid_t pid;
+ pid_t ppid;
off_t off;
int status;
@@ -69,10 +70,24 @@ main (void)
if (off == (off_t) -1 || off != strlen (testdata))
error (EXIT_FAILURE, errno, "wrong file position");
+ /* Get the parent PID. */
+ ppid = getpid ();
+
/* Now fork of the process. */
pid = fork ();
if (pid == 0)
{
+ /* One little test first: the PID must have changed. */
+ if (getpid () == ppid)
+ error (EXIT_FAILURE, 0, "child and parent have same PID");
+
+ /* Test the `getppid' function. */
+ pid = getppid ();
+ if (pid == (pid_t) -1 ? errno != ENOSYS : pid != ppid)
+ error (EXIT_FAILURE, 0,
+ "getppid returned wrong PID (%ld, should be %ld)",
+ (long int) pid, (long int) ppid);
+
/* This is the child. First get the position of the descriptor. */
off = lseek (fd, 0, SEEK_CUR);
if (off == (off_t) -1 || off != strlen (testdata))