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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2016-11-03 22:13:08 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2016-11-03 22:13:08 +0100 |
| commit | 79e2598c48ad7e41d523f62368454c7d74f48268 (patch) | |
| tree | b061ea33e433dcd509a99dc9726251f2e0f785e5 /libbb/run_shell.c | |
| parent | 2b288236e80938d29324072a823f46861bd07cd3 (diff) | |
| download | busybox-79e2598c48ad7e41d523f62368454c7d74f48268.tar.gz | |
su: expand help; simplify passing of -c CMD to run_shell()
Also, added a comment about bug 9401 (TIOCSTI input injection).
function old new delta
packed_usage 30909 30932 +23
su_main 470 487 +17
sulogin_main 260 258 -2
run_applet_and_exit 681 678 -3
run_shell 166 126 -40
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/run_shell.c')
| -rw-r--r-- | libbb/run_shell.c | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/libbb/run_shell.c b/libbb/run_shell.c index 4d92c3caa..b6b9360e8 100644 --- a/libbb/run_shell.c +++ b/libbb/run_shell.c @@ -50,19 +50,17 @@ void FAST_FUNC set_current_security_context(security_context_t sid) #endif /* Run SHELL, or DEFAULT_SHELL if SHELL is "" or NULL. - * If COMMAND is nonzero, pass it to the shell with the -c option. - * If ADDITIONAL_ARGS is nonzero, pass it to the shell as more - * arguments. */ -void FAST_FUNC run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) + * If ADDITIONAL_ARGS is not NULL, pass them to the shell. + */ +void FAST_FUNC run_shell(const char *shell, int loginshell, const char **additional_args) { const char **args; - int argno; - int additional_args_cnt = 0; - for (args = additional_args; args && *args; args++) - additional_args_cnt++; + args = additional_args; + while (args && *args) + args++; - args = xmalloc(sizeof(char*) * (4 + additional_args_cnt)); + args = xmalloc(sizeof(char*) * (2 + (args - additional_args))); if (!shell || !shell[0]) shell = DEFAULT_SHELL; @@ -70,16 +68,13 @@ void FAST_FUNC run_shell(const char *shell, int loginshell, const char *command, args[0] = bb_get_last_path_component_nostrip(shell); if (loginshell) args[0] = xasprintf("-%s", args[0]); - argno = 1; - if (command) { - args[argno++] = "-c"; - args[argno++] = command; - } + args[1] = NULL; if (additional_args) { - for (; *additional_args; ++additional_args) - args[argno++] = *additional_args; + int cnt = 1; + for (;;) + if ((args[cnt++] = *additional_args++) == NULL) + break; } - args[argno] = NULL; #if ENABLE_SELINUX if (current_sid) |