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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-10-24 20:22:12 +0200
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-10-24 20:22:12 +0200
commit7988979a722b4cdf287b2093956a76a3f19b9897 (patch)
treed35e251d0472ceca55a2eef61cff261c8ee68fab /test/misc/fdopen.c
add uClibc-ng test directory
Diffstat (limited to 'test/misc/fdopen.c')
-rw-r--r--test/misc/fdopen.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/test/misc/fdopen.c b/test/misc/fdopen.c
new file mode 100644
index 0000000..97e66de
--- /dev/null
+++ b/test/misc/fdopen.c
@@ -0,0 +1,52 @@
+/* Test for fdopen bugs. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#define assert(x) \
+ if (!(x)) \
+ { \
+ fputs ("test failed: " #x "\n", stderr); \
+ retval = 1; \
+ goto the_end; \
+ }
+
+int
+main (int argc, char *argv[])
+{
+ char name[256];
+ FILE *fp = NULL;
+ int retval = 0;
+ int fd;
+
+ /* hack to get a tempfile name w/out using tmpname()
+ * as that func causes a link time warning */
+ sprintf(name, "%s-uClibc-test.XXXXXX", __FILE__);
+ fd = mkstemp(name);
+ close(fd);
+
+ fp = fopen (name, "w");
+ assert (fp != NULL)
+ assert (fputs ("foobar and baz", fp) > 0);
+ assert (fclose (fp) == 0);
+ fp = NULL;
+
+ fd = open (name, O_RDWR|O_CREAT, 0660);
+ assert (fd != -1);
+ assert (lseek (fd, 5, SEEK_SET) == 5);
+
+ fp = fdopen (fd, "a");
+ assert (fp != NULL);
+ /* SuSv3 says that doing a fdopen() does not reset the file position,
+ * thus the '5' here is correct, not '14'. */
+ assert (ftell (fp) == 5);
+
+the_end:
+ if (fp != NULL)
+ assert (fclose (fp) == 0);
+ unlink (name);
+
+ return retval;
+}