Last change
on this file since 377 was 352, checked in by coas-nagasima, 6 years ago |
arm向けASP3版ECNLを追加
|
-
Property svn:eol-style
set to
native
-
Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
|
File size:
1.2 KB
|
Rev | Line | |
---|
[352] | 1 | #include "stdio_impl.h"
|
---|
| 2 | #include <fcntl.h>
|
---|
| 3 |
|
---|
| 4 | /* The basic idea of this implementation is to open a new FILE,
|
---|
| 5 | * hack the necessary parts of the new FILE into the old one, then
|
---|
| 6 | * close the new FILE. */
|
---|
| 7 |
|
---|
| 8 | /* Locking IS necessary because another thread may provably hold the
|
---|
| 9 | * lock, via flockfile or otherwise, when freopen is called, and in that
|
---|
| 10 | * case, freopen cannot act until the lock is released. */
|
---|
| 11 |
|
---|
| 12 | int __dup3(int, int, int);
|
---|
| 13 |
|
---|
| 14 | FILE *freopen(const char *restrict filename, const char *restrict mode, FILE *restrict f)
|
---|
| 15 | {
|
---|
| 16 | int fl = __fmodeflags(mode);
|
---|
| 17 | FILE *f2;
|
---|
| 18 |
|
---|
| 19 | FLOCK(f);
|
---|
| 20 |
|
---|
| 21 | fflush(f);
|
---|
| 22 |
|
---|
| 23 | if (!filename) {
|
---|
| 24 | if (fl&O_CLOEXEC)
|
---|
| 25 | __syscall(SYS_fcntl, f->fd, F_SETFD, FD_CLOEXEC);
|
---|
| 26 | fl &= ~(O_CREAT|O_EXCL|O_CLOEXEC);
|
---|
| 27 | if (syscall(SYS_fcntl, f->fd, F_SETFL, fl) < 0)
|
---|
| 28 | goto fail;
|
---|
| 29 | } else {
|
---|
| 30 | f2 = fopen(filename, mode);
|
---|
| 31 | if (!f2) goto fail;
|
---|
| 32 | if (f2->fd == f->fd) f2->fd = -1; /* avoid closing in fclose */
|
---|
| 33 | else if (__dup3(f2->fd, f->fd, fl&O_CLOEXEC)<0) goto fail2;
|
---|
| 34 |
|
---|
| 35 | f->flags = (f->flags & F_PERM) | f2->flags;
|
---|
| 36 | f->read = f2->read;
|
---|
| 37 | f->write = f2->write;
|
---|
| 38 | f->seek = f2->seek;
|
---|
| 39 | f->close = f2->close;
|
---|
| 40 |
|
---|
| 41 | fclose(f2);
|
---|
| 42 | }
|
---|
| 43 |
|
---|
| 44 | FUNLOCK(f);
|
---|
| 45 | return f;
|
---|
| 46 |
|
---|
| 47 | fail2:
|
---|
| 48 | fclose(f2);
|
---|
| 49 | fail:
|
---|
| 50 | fclose(f);
|
---|
| 51 | return NULL;
|
---|
| 52 | }
|
---|
| 53 |
|
---|
| 54 | LFS64(freopen);
|
---|
Note:
See
TracBrowser
for help on using the repository browser.