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glocalfileoutputstream: Fix symlink writing on FreeBSD and NetBSD

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FreeBSD, DragonflyBSD and NetBSD support O_NOFOLLOW, but they use error
numbers that are different from what POSIX standard specifies. They are
not going to change the behavior, and existing programs on these systems
already take advantage of this difference. To support them, we have to
add a check in GIO to use different error numbers on these systems.

https://bugzilla.gnome.org/show_bug.cgi?id=775593
This commit is contained in:
Ting-Wei Lan 2016-12-04 15:02:54 +08:00
parent 9c254f472f
commit 45d4b59e3f
1 changed files with 6 additions and 0 deletions
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6
gio/glocalfileoutputstream.c
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@ -763,7 +763,13 @@ handle_overwrite_open (const char *filename,
#ifdef O_NOFOLLOW
is_symlink = FALSE;
fd = g_open (filename, open_flags | O_NOFOLLOW, mode);
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
if (fd == -1 && errno == EMLINK)
#elif defined(__NetBSD__)
if (fd == -1 && errno == EFTYPE)
#else
if (fd == -1 && errno == ELOOP)
#endif
{
/* Could be a symlink, or it could be a regular ELOOP error,
* but then the next open will fail too. */