diff options
Diffstat (limited to 'libbb/vfork_daemon_rexec.c')
| -rw-r--r-- | libbb/vfork_daemon_rexec.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/libbb/vfork_daemon_rexec.c b/libbb/vfork_daemon_rexec.c index ce5a627..7dbc152 100644 --- a/libbb/vfork_daemon_rexec.c +++ b/libbb/vfork_daemon_rexec.c @@ -119,11 +119,16 @@ int spawn_and_wait(char **argv) if (a->nofork) #endif { - int old_sleep = die_sleep; + /* Save some shared globals */ + const struct bb_applet *old_a = current_applet; int old_x = xfunc_error_retval; uint32_t old_m = option_mask32; + int old_sleep = die_sleep; + current_applet = a; + applet_name = a->name; xfunc_error_retval = EXIT_FAILURE; + /*option_mask32 = 0; - not needed */ /* special flag for xfunc_die(). If xfunc will "die" * in NOFORK applet, xfunc_die() sees negative * die_sleep and longjmp here instead. */ @@ -131,25 +136,24 @@ int spawn_and_wait(char **argv) rc = setjmp(die_jmp); if (!rc) { - const struct bb_applet *old_a = current_applet; - current_applet = a; - applet_name = a->name; -// what else should we save/restore? -// TODO: what if applet will mangle argv vector? -// xargs needs argv untouched because it frees argv[i]! -// shouldn't we pass a copy? - rc = a->main(argc, argv); - current_applet = old_a; - applet_name = old_a->name; - } else { - /* xfunc died in NOFORK applet */ + /* Some callers (xargs) + * need argv untouched because they free argv[i]! */ + char *tmp_argv[argc+1]; + memcpy(tmp_argv, argv, (argc+1) * sizeof(tmp_argv[0])); + /* Finally we can call NOFORK applet's main() */ + rc = a->main(argc, tmp_argv); + } else { /* xfunc died in NOFORK applet */ + /* in case they meant to return 0... */ if (rc == -111) rc = 0; } - die_sleep = old_sleep; + /* Restoring globals */ + current_applet = old_a; + applet_name = old_a->name; xfunc_error_retval = old_x; option_mask32 = old_m; + die_sleep = old_sleep; return rc; } #if BB_MMU |