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trash portal: Fix permission checks

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Implement the approach suggested in
https://gitlab.gnome.org/GNOME/glib/merge_requests/276

1. Try to open O_RDWR. On success, pass that fd
2. If EACCESS => fail the trash op, we "need" read-write to successfully trash it
3. If EISDIR => re-open the fd with O_PATH, and pass that (which will fail on snap,
   but verify the dir for flatpaks)
This commit is contained in:
Matthias Clasen 2019-03-04 19:47:11 +00:00 committed by Philip Withnall
parent 7fa9a2a5da
commit 147ac51f90
1 changed files with 7 additions and 3 deletions
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10
gio/gtrashportal.c
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@ -37,6 +37,10 @@
#define HAVE_O_CLOEXEC 1
#endif
#ifndef O_PATH
#define O_PATH 0
#endif
static GXdpTrash *
ensure_trash_portal (void)
{
@ -83,9 +87,9 @@ g_trash_portal_trash_file (GFile *file,
path = g_file_get_path (file);
fd = g_open (path, O_RDWR | O_CLOEXEC);
if (fd == -1 && (errno == EACCES || errno == EISDIR))
/* If we don't have write access, fall back to read-only */
fd = g_open (path, O_CLOEXEC | O_RDONLY);
if (fd == -1 && errno == EISDIR)
/* If it is a directory, fall back to O_PATH */
fd = g_open (path, O_PATH | O_CLOEXEC | O_RDONLY);
errsv = errno;