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libbb: spawn_and_wait() fflushes before forking NOEXEC; child reinits logmode

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2017-01-26 01:13:58 +01:00
parent 06f20bf675
commit 9967c9949e
3 changed files with 35 additions and 22 deletions
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14
include/libbb.h
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@ -1093,10 +1093,19 @@ pid_t wait_any_nohang(int *wstat) FAST_FUNC;
*/
int wait4pid(pid_t pid) FAST_FUNC;
int wait_for_exitstatus(pid_t pid) FAST_FUNC;
/************************************************************************/
/* spawn_and_wait/run_nofork_applet/run_applet_no_and_exit need to work */
/* carefully together to reinit some global state while not disturbing */
/* other. Be careful if you change them. Consult docs/nofork_noexec.txt */
/************************************************************************/
/* Same as wait4pid(spawn(argv)), but with NOFORK/NOEXEC if configured: */
int spawn_and_wait(char **argv) FAST_FUNC;
/* Does NOT check that applet is NOFORK, just blindly runs it */
int run_nofork_applet(int applet_no, char **argv) FAST_FUNC;
#ifndef BUILD_INDIVIDUAL
extern int find_applet_by_name(const char *name) FAST_FUNC;
extern void run_applet_no_and_exit(int a, char **argv) NORETURN FAST_FUNC;
#endif
/* Helpers for daemonization.
*
@ -1303,11 +1312,6 @@ const struct hwtype *get_hwtype(const char *name) FAST_FUNC;
const struct hwtype *get_hwntype(int type) FAST_FUNC;
#ifndef BUILD_INDIVIDUAL
extern int find_applet_by_name(const char *name) FAST_FUNC;
extern void run_applet_no_and_exit(int a, char **argv) NORETURN FAST_FUNC;
#endif
#ifdef HAVE_MNTENT_H
extern int match_fstype(const struct mntent *mt, const char *fstypes) FAST_FUNC;
extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC;