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flock: fix -c; improve error handling of fork+exec

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function                                             old     new   delta
flock_main                                           254     334     +80

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2016-04-24 18:19:49 +02:00
parent 4ab372d49a
commit e1d426fd65
1 changed files with 17 additions and 2 deletions
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19
util-linux/flock.c
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@ -57,7 +57,6 @@ int flock_main(int argc UNUSED_PARAM, char **argv)
/* If it is "flock FILE -c PROG", then -c isn't caught by getopt32:
* we use "+" in order to support "flock -opt FILE PROG -with-opts",
* we need to remove -c by hand.
* TODO: in upstream, -c 'PROG ARGS' means "run sh -c 'PROG ARGS'"
*/
if (argv[0]
&& argv[0][0] == '-'
@ -66,6 +65,9 @@ int flock_main(int argc UNUSED_PARAM, char **argv)
)
) {
argv++;
if (argv[1])
bb_error_msg_and_die("-c takes only one argument");
opt |= OPT_c;
}
if (OPT_s == LOCK_SH && OPT_x == LOCK_EX && OPT_n == LOCK_NB && OPT_u == LOCK_UN) {
@ -90,8 +92,21 @@ int flock_main(int argc UNUSED_PARAM, char **argv)
bb_perror_nomsg_and_die();
}
if (argv[0])
if (argv[0]) {
if (!(opt & OPT_c)) {
int rc = spawn_and_wait(argv);
if (rc < 0)
bb_simple_perror_msg(argv[0]);
return rc;
}
/* -c 'PROG ARGS' means "run sh -c 'PROG ARGS'" */
argv -= 2;
argv[0] = (char*)get_shell_name();
argv[1] = (char*)"-c";
/* argv[2] = "PROG ARGS"; */
/* argv[3] = NULL; */
return spawn_and_wait(argv);
}
return EXIT_SUCCESS;
}