summaryrefslogtreecommitdiff
path: root/fs/binfmt_misc.c
diff options
context:
space:
mode:
authorLaurent Vivier <laurent@vivier.eu>2020-01-28 14:25:39 +0100
committerHelge Deller <deller@gmx.de>2021-02-15 18:28:30 +0100
commit2347961b11d4079deace3c81dceed460c08a8fc1 (patch)
tree95d1d45ad5830c673b6d19b08ede9e9675571926 /fs/binfmt_misc.c
parentb7795074a04669d0a023babf786d29bf67c68783 (diff)
binfmt_misc: pass binfmt_misc flags to the interpreter
It can be useful to the interpreter to know which flags are in use. For instance, knowing if the preserve-argv[0] is in use would allow to skip the pathname argument. This patch uses an unused auxiliary vector, AT_FLAGS, to add a flag to inform interpreter if the preserve-argv[0] is enabled. Note by Helge Deller: The real-world user of this patch is qemu-user, which needs to know if it has to preserve the argv[0]. See Debian bug #970460. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: YunQiang Su <ysu@wavecomp.com> URL: http://bugs.debian.org/970460 Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'fs/binfmt_misc.c')
-rw-r--r--fs/binfmt_misc.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 3880a82da1dc..c457334de43f 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -153,7 +153,9 @@ static int load_misc_binary(struct linux_binprm *bprm)
if (bprm->interp_flags & BINPRM_FLAGS_PATH_INACCESSIBLE)
goto ret;
- if (!(fmt->flags & MISC_FMT_PRESERVE_ARGV0)) {
+ if (fmt->flags & MISC_FMT_PRESERVE_ARGV0) {
+ bprm->interp_flags |= BINPRM_FLAGS_PRESERVE_ARGV0;
+ } else {
retval = remove_arg_zero(bprm);
if (retval)
goto ret;