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tentatively fix getopt state corruption for NOFORK applets

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This commit is contained in:
Denis Vlasenko 2008-01-27 22:39:55 +00:00
parent f470196a41
commit c4e4be9414
1 changed files with 24 additions and 2 deletions
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26
libbb/vfork_daemon_rexec.c
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@ -131,12 +131,34 @@ int run_nofork_applet_prime(struct nofork_save_area *old, int applet_no, char **
applet_name = APPLET_NAME(applet_no);
xfunc_error_retval = EXIT_FAILURE;
/*option_mask32 = 0; - not needed */
/* special flag for xfunc_die(). If xfunc will "die"
/* Special flag for xfunc_die(). If xfunc will "die"
* in NOFORK applet, xfunc_die() sees negative
* die_sleep and longjmp here instead. */
die_sleep = -1;
/* Reset the libc getopt() function, which keeps internal state.
*
* BSD-derived getopt() functions require that optind be reset to 1 in
* order to reset getopt() state. This used to be generally accepted
* way of resetting getopt(). However, glibc's getopt()
* has additional getopt() state beyond optind, and requires that
* optind be set zero to reset its state. So the unfortunate state of
* affairs is that BSD-derived versions of getopt() misbehave if
* optind is set to 0 in order to reset getopt(), and glibc's getopt()
* will core ump if optind is set 1 in order to reset getopt().
*
* More modern versions of BSD require that optreset be set to 1 in
* order to reset getopt(). Sigh. Standards, anyone?
*/
#ifdef __GLIBC__
optind = 0;
#else /* BSD style */
optind = 1;
/* optreset = 1; */
#endif
/* option_mask32 = 0; - not needed */
argc = 1;
while (argv[argc])
argc++;