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tests: Check return values of write() and dup2().

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This commit is contained in:
Simon Ruderich
2013-06-21 18:49:11 +02:00
parent 0d7f306898
commit 219a9882ba
3 changed files with 38 additions and 18 deletions
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20
tests/example.c
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@@ -25,6 +25,7 @@
#include <errno.h>
#include "../src/compiler.h"
#include "example.h"
int main(int argc, char **argv unused) {
@@ -35,22 +36,21 @@ int main(int argc, char **argv unused) {
errno = ENOMEM;
perror("error!");
write(STDERR_FILENO, "write to stderr 2", 17);
write(STDOUT_FILENO, "write to stdout 2", 17);
xwrite(STDERR_FILENO, "write to stderr 2", 17);
xwrite(STDOUT_FILENO, "write to stdout 2", 17);
fprintf(stderr, "\n");
fprintf(stdout, "\n");
fflush(stdout);
/* Check usage of tracked_fds_list (at least in parts). No error checking
* here! */
dup2(STDERR_FILENO, 471);
dup2(471, 42);
write(471, "more on stderr\n", 15);
/* Check usage of tracked_fds_list (at least in parts). */
xdup2(STDERR_FILENO, 471);
xdup2(471, 42);
xwrite(471, "more on stderr\n", 15);
close(471);
dup2(STDOUT_FILENO, 471);
write(42, "stderr ...\n", 11);
write(471, "more on stdout\n", 15);
xdup2(STDOUT_FILENO, 471);
xwrite(42, "stderr ...\n", 11);
xwrite(471, "more on stdout\n", 15);
/* Glibc uses __overflow() for this ... */
putc_unlocked('x', stderr);