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Address problem where commands to be run in subshells were getting mangled by command-line parsing.

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They are now encoded to prevent this.
This commit is contained in:
Stephen Heumann 2014-12-09 19:52:58 -06:00
parent ac0aab62bf
commit aca9256f97
1 changed files with 17 additions and 2 deletions
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19
shell/hush.c
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@ -5797,6 +5797,20 @@ static char *decode_arg(char *arg)
return arg;
}
extern void *alloc_for_current_process(size_t size);
/* Return an encoded copy of arg (or die on failure).
* The copy is allocated with alloc_for_current_process,
* so it will be deallocated when the process quits or execs. */
static char *encode_arg_dup(const char *arg)
{
char *encoded = alloc_for_current_process(strlen(arg) + 1);
if (encoded == NULL)
_exit(127);
strcpy(encoded, arg);
return encode_arg(encoded);
}
static void code_subshell_args(char *(*coder_fn)(char *))
{
struct variable *cur;
@ -5824,6 +5838,7 @@ static void code_subshell_args(char *(*coder_fn)(char *))
# define encode_arg(x) (x)
# define decode_arg(x) (x)
# define encode_arg_dup(x) (x)
# define encode_subshell_args() do {} while (0)
# define decode_subshell_args() do {} while (0)
@ -6013,7 +6028,7 @@ static void re_execute_shell(char ***to_free, const char *s,
* I conclude it means we don't need to pass active traps here.
*/
*pp++ = (char *) "-c";
*pp++ = (char *) s;
*pp++ = encode_arg_dup((char *) s);
if (builtin_argv) {
while (*++builtin_argv)
*pp++ = *builtin_argv;
@ -8403,7 +8418,7 @@ int hush_main(int argc, char **argv)
G.global_argc++;
} /* else -c 'script' ARG0 [ARG1...]: $0 is ARG0 */
install_special_sighandlers();
parse_and_run_string(optarg);
parse_and_run_string(G.root_pid != getpid() ? decode_arg(optarg) : optarg);
goto final_return;
case 'i':
/* Well, we cannot just declare interactiveness,