1 files changed, 82 insertions, 0 deletions
diff --git a/test/misc/seek.c b/test/misc/seek.c
new file mode 100644
index 0000000..c5edb94
--- /dev/null
+++ b/test/misc/seek.c
@@ -0,0 +1,82 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <assert.h>
+
+#define ARRAY_SIZE(arr) (sizeof(arr)/sizeof(*arr))
+
+int main(void)
+{
+	struct {
+		off_t offset;
+		int   whence;
+	} tests[] = {
+		{ 0x00, SEEK_SET },
+		{ 0x01, SEEK_SET },
+		{ 0xFF, SEEK_SET }
+	};
+	char buf[2000];
+	off_t ret;
+	int i, fd;
+	FILE *fp;
+	int tmp;
+
+	fd = open("lseek.out", O_RDWR|O_CREAT, 0600);
+	if (fd == -1) {
+		perror("open(lseek.out) failed");
+		return 1;
+	}
+	unlink("lseek.out");
+	fp = fdopen(fd, "rw");
+	if (fp == NULL) {
+		perror("fopen(lseek.out) failed");
+		return 1;
+	}
+
+	memset(buf, 0xAB, sizeof(buf));
+	ret = write(fd, buf, sizeof(buf));
+	if (ret != sizeof(buf)) {
+		fprintf(stderr, "write() failed to write %zi bytes (wrote %li): ", sizeof(buf), (long)ret);
+		perror("");
+		return 1;
+	}
+
+	tmp = fseeko(fp, 1024, SEEK_SET);
+	assert(tmp == 0);
+	tmp = fseeko(fp, (off_t)-16, SEEK_CUR);
+	assert(tmp == 0);
+	ret = ftell(fp);
+	if (ret != (1024-16)) {
+		fprintf(stderr, "ftell() failed, we wanted pos %i but got %li: ", (1024-16), (long)ret);
+		perror("");
+		return 1;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(tests); ++i) {
+		ret = lseek(fd, tests[i].offset, tests[i].whence);
+		if (ret != tests[i].offset) {
+			fprintf(stderr, "lseek(%li,%i) failed (wanted %li, got %li): ", (long)tests[i].offset,
+			        tests[i].whence, (long)tests[i].offset, (long)ret);
+			perror("");
+			return 1;
+		}
+		ret = fseek(fp, tests[i].offset, tests[i].whence);
+		if (ret != 0) {
+			fprintf(stderr, "fseek(%li,%i) failed (wanted 0, got %li): ", (long)tests[i].offset,
+			        tests[i].whence, (long)ret);
+			perror("");
+			return 1;
+		}
+	}
+
+	fclose(fp);
+	close(fd);
+
+	printf("Success!\n");
+
+	return 0;
+}