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unify set handling with command line processing, fixup set argv processing so it doesnt clobber argv when setting options, and barf on unhandled set options

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This commit is contained in:
Mike Frysinger 2009-03-28 13:44:51 +00:00
parent 19a7ea126a
commit ad88d5a4cf
1 changed files with 43 additions and 16 deletions
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59
shell/hush.c
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@ -516,6 +516,7 @@ static int builtin_read(char **argv);
static int builtin_test(char **argv);
static int builtin_true(char **argv);
static int builtin_set(char **argv);
static int builtin_set_mode(const char, const char);
static int builtin_shift(char **argv);
static int builtin_source(char **argv);
static int builtin_umask(char **argv);
@ -4256,13 +4257,14 @@ int hush_main(int argc, char **argv)
* we have to have some stuff (ctty, etc) */
/* G.interactive_fd++; */
break;
case 'n':
G.fake_mode = 1;
break;
case 's':
/* "-s" means "read from stdin", but this is how we always
* operate, so simply do nothing here. */
break;
case 'n':
case 'x':
if (!builtin_set_mode('-', opt))
break;
default:
#ifndef BB_VER
fprintf(stderr, "Usage: sh [FILE]...\n"
@ -4613,10 +4615,11 @@ static int builtin_read(char **argv)
return set_local_var(string, 0);
}
/* built-in 'set' handler
/* http://www.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#set
* built-in 'set' handler
* SUSv3 says:
* set [-abCefmnuvx] [-h] [-o option] [argument...]
* set [+abCefmnuvx] [+h] [+o option] [argument...]
* set [-abCefhmnuvx] [-o option] [argument...]
* set [+abCefhmnuvx] [+o option] [argument...]
* set -- [argument...]
* set -o
* set +o
@ -4631,9 +4634,18 @@ static int builtin_read(char **argv)
* Set the positional parameters to the expansion of x, even if x expands
* with a leading '-' or '+': set -- $x
*
* So far, we only support "set -- [argument...]" by ignoring all options
* (also, "-o option" will be mishandled by taking "option" as parameter #1).
* So far, we only support "set -- [argument...]" and some of the short names.
*/
static int builtin_set_mode(const char cstate, const char mode)
{
int state = (cstate == '-' ? 1 : 0);
switch (mode) {
case 'n': G.fake_mode = state; break;
case 'x': /*G.debug_mode = state;*/ break;
default: return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
static int builtin_set(char **argv)
{
int n;
@ -4647,18 +4659,28 @@ static int builtin_set(char **argv)
return EXIT_SUCCESS;
}
do {
if (arg[0] == '+')
continue;
if (arg[0] != '-')
break;
if (arg[1] == '-' && arg[2] == '\0') {
argv++;
break;
do {
if (!strcmp(arg, "--")) {
++argv;
goto set_argv;
}
if (arg[0] == '+' || arg[0] == '-') {
for (n = 1; arg[n]; ++n)
if (builtin_set_mode(arg[0], arg[n]))
goto error;
continue;
}
break;
} while ((arg = *++argv) != NULL);
/* Now argv[0] is 1st argument */
/* Only reset global_argv if we didn't process anything */
if (arg == NULL)
return EXIT_SUCCESS;
set_argv:
/* NB: G.global_argv[0] ($0) is never freed/changed */
g_argv = G.global_argv;
if (G.global_args_malloced) {
@ -4681,6 +4703,11 @@ static int builtin_set(char **argv)
G.global_argc = n;
return EXIT_SUCCESS;
/* Nothing known, so abort */
error:
bb_error_msg("set: %s: invalid option", arg);
return EXIT_FAILURE;
}
static int builtin_shift(char **argv)