1 // commit 3af2edee150484940916eba1984f78c3b965dd05 2014-02-07
2 // fix ftello result for append streams with unflushed output
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <string.h>
8 #include <unistd.h>
9 #include "test.h"
10
11 #define ASSERT(c) do { \
12 errno = 0; \
13 if (!(c)) \
14 t_error("%s failed (errno: %s)\n", #c, strerror(errno)); \
15 } while(0)
16
main(void)17 int main(void)
18 {
19 char tmp[] = "/tmp/testsuite-XXXXXX";
20 int fd;
21 FILE *f;
22 off_t off;
23
24 ASSERT((fd = mkstemp(tmp)) > 2);
25 ASSERT(write(fd, "abcd", 4) == 4);
26 ASSERT(close(fd) == 0);
27
28 ASSERT((fd = open(tmp, O_WRONLY)) > 2);
29 ASSERT(f = fdopen(fd, "a"));
30 if (f) {
31 ASSERT(fwrite("efg", 1, 3, f) == 3);
32 ASSERT((off = ftello(f)) != -1);
33 if (off != 7)
34 t_error("ftello is broken before flush: got %lld, want 7\n", (long long)off);
35 ASSERT(fflush(f) == 0);
36 ASSERT((off = ftello(f)) != -1);
37 if (off != 7)
38 t_error("ftello is broken after flush: got %lld, want 7\n", (long long)off);
39 ASSERT(fclose(f) == 0);
40 }
41 if (fd > 2)
42 ASSERT(unlink(tmp) == 0);
43 return t_status;
44 }
45