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libbb: fix mishandling of "all argv are opts" in getopt32()

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function                                             old     new   delta
top_main                                            1100    1095      -5
getopt32                                            1398    1361     -37
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-42)             Total: -42 bytes
This commit is contained in:
Denis Vlasenko 2008-08-20 00:12:22 +00:00
parent 6c4eb44113
commit 1c45a505eb
2 changed files with 25 additions and 42 deletions
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64
libbb/getopt32.c
View File

@ -174,7 +174,7 @@ Special characters:
on the command line. on the command line.
"V-" An option with dash before colon or end-of-line results in "V-" An option with dash before colon or end-of-line results in
bb_show_usage being called if this option is encountered. bb_show_usage() being called if this option is encountered.
This is typically used to implement "print verbose usage message This is typically used to implement "print verbose usage message
and exit" option. and exit" option.
@ -285,10 +285,6 @@ const char *const bb_argv_dash[] = { "-", NULL };
const char *opt_complementary; const char *opt_complementary;
/* Many small applets don't want to suck in stdio.h only because
* they need to parse options by calling us */
#define DONT_USE_PRINTF 1
enum { enum {
PARAM_STRING, PARAM_STRING,
PARAM_LIST, PARAM_LIST,
@ -322,7 +318,7 @@ getopt32(char **argv, const char *applet_opts, ...)
int argc; int argc;
unsigned flags = 0; unsigned flags = 0;
unsigned requires = 0; unsigned requires = 0;
t_complementary complementary[33]; t_complementary complementary[33]; /* last stays zero-filled */
int c; int c;
const unsigned char *s; const unsigned char *s;
t_complementary *on_off; t_complementary *on_off;
@ -332,14 +328,13 @@ getopt32(char **argv, const char *applet_opts, ...)
struct option *long_options = (struct option *) &bb_null_long_options; struct option *long_options = (struct option *) &bb_null_long_options;
#endif #endif
unsigned trigger; unsigned trigger;
char **pargv = NULL; char **pargv;
int min_arg = 0; int min_arg = 0;
int max_arg = -1; int max_arg = -1;
#define SHOW_USAGE_IF_ERROR 1 #define SHOW_USAGE_IF_ERROR 1
#define ALL_ARGV_IS_OPTS 2 #define ALL_ARGV_IS_OPTS 2
#define FIRST_ARGV_IS_OPT 4 #define FIRST_ARGV_IS_OPT 4
#define FREE_FIRST_ARGV_IS_OPT (8 * !DONT_USE_PRINTF)
int spec_flgs = 0; int spec_flgs = 0;
@ -493,17 +488,18 @@ getopt32(char **argv, const char *applet_opts, ...)
} }
va_end(p); va_end(p);
if (spec_flgs & FIRST_ARGV_IS_OPT) { if (spec_flgs & (FIRST_ARGV_IS_OPT | ALL_ARGV_IS_OPTS)) {
if (argv[1] && argv[1][0] != '-' && argv[1][0] != '\0') { pargv = argv + 1;
#if DONT_USE_PRINTF while (*pargv) {
char *pp = alloca(strlen(argv[1]) + 2); if (pargv[0][0] != '-' && pargv[0][0] != '\0') {
*pp = '-'; char *pp = alloca(strlen(*pargv) + 2);
strcpy(pp + 1, argv[1]); *pp = '-';
argv[1] = pp; strcpy(pp + 1, *pargv);
#else *pargv = pp;
argv[1] = xasprintf("-%s", argv[1]); }
spec_flgs |= FREE_FIRST_ARGV_IS_OPT; if (!(spec_flgs & ALL_ARGV_IS_OPTS))
#endif break;
pargv++;
} }
} }
@ -529,6 +525,7 @@ getopt32(char **argv, const char *applet_opts, ...)
/* optreset = 1; */ /* optreset = 1; */
#endif #endif
/* optarg = NULL; opterr = 0; optopt = 0; - do we need this?? */ /* optarg = NULL; opterr = 0; optopt = 0; - do we need this?? */
pargv = NULL;
/* Note: just "getopt() <= 0" will not work well for /* Note: just "getopt() <= 0" will not work well for
* "fake" short options, like this one: * "fake" short options, like this one:
@ -540,12 +537,17 @@ getopt32(char **argv, const char *applet_opts, ...)
#else #else
while ((c = getopt(argc, argv, applet_opts)) != -1) { while ((c = getopt(argc, argv, applet_opts)) != -1) {
#endif #endif
/* getopt prints "option requires an argument -- X"
* and returns '?' if an option has no arg, but one is reqd */
c &= 0xff; /* fight libc's sign extension */ c &= 0xff; /* fight libc's sign extension */
loop_arg_is_opt:
for (on_off = complementary; on_off->opt_char != c; on_off++) { for (on_off = complementary; on_off->opt_char != c; on_off++) {
/* c==0 if long opt have non NULL flag */ /* c can be NUL if long opt has non-NULL ->flag,
if (on_off->opt_char == '\0' && c != '\0') * but we construct long opts so that flag
* is always NULL (see above) */
if (on_off->opt_char == '\0' /* && c != '\0' */) {
/* c is probably '?' - "bad option" */
bb_show_usage(); bb_show_usage();
}
} }
if (flags & on_off->incongruously) if (flags & on_off->incongruously)
bb_show_usage(); bb_show_usage();
@ -570,24 +572,6 @@ getopt32(char **argv, const char *applet_opts, ...)
break; break;
} }
if (spec_flgs & ALL_ARGV_IS_OPTS) {
/* process argv is option, for example "ps" applet */
if (pargv == NULL)
pargv = argv + optind;
while (*pargv) {
c = **pargv;
if (c == '\0') {
pargv++;
} else {
(*pargv)++;
goto loop_arg_is_opt;
}
}
}
if (spec_flgs & FREE_FIRST_ARGV_IS_OPT)
free(argv[1]);
/* check depending requires for given options */ /* check depending requires for given options */
for (on_off = complementary; on_off->opt_char; on_off++) { for (on_off = complementary; on_off->opt_char; on_off++) {
if (on_off->requires && (flags & on_off->switch_on) && if (on_off->requires && (flags & on_off->switch_on) &&

3
procps/top.c
View File

@ -763,8 +763,7 @@ int top_main(int argc UNUSED_PARAM, char **argv)
/* all args are options; -n NUM */ /* all args are options; -n NUM */
opt_complementary = "-:n+"; opt_complementary = "-:n+";
getopt32(argv, "d:n:b", &sinterval, &iterations); if (getopt32(argv, "d:n:b", &sinterval, &iterations) & OPT_d) {
if (option_mask32 & OPT_d) {
/* Need to limit it to not overflow poll timeout */ /* Need to limit it to not overflow poll timeout */
interval = xatou16(sinterval); // -d interval = xatou16(sinterval); // -d
} }