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Bug fix: Issue #47: Locale cause problems with float arguments

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A locale using comma instead of dot in floating point values causes
unexpected behavior when parsing floating point commandline arguments.
This commits enforces LC_NUMERIC="C" during commandline argument parsing.
This commit is contained in:
Richard Grenville 2012-09-27 22:30:16 +08:00
parent 75ebe94bb6
commit 69513d6231
1 changed files with 10 additions and 0 deletions
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10
src/compton.c
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@ -3229,6 +3229,7 @@ get_cfg(int argc, char *const *argv) {
Bool shadow_enable = False, fading_enable = False; Bool shadow_enable = False, fading_enable = False;
int o, longopt_idx, i; int o, longopt_idx, i;
char *config_file = NULL; char *config_file = NULL;
char *lc_numeric_old = mstrcpy(setlocale(LC_NUMERIC, NULL));
for (i = 0; i < NUM_WINTYPES; ++i) { for (i = 0; i < NUM_WINTYPES; ++i) {
opts.wintype_fade[i] = False; opts.wintype_fade[i] = False;
@ -3251,6 +3252,11 @@ get_cfg(int argc, char *const *argv) {
#endif #endif
// Parse commandline arguments. Range checking will be done later. // Parse commandline arguments. Range checking will be done later.
// Enforce LC_NUMERIC locale "C" here to make sure dots are recognized
// instead of commas in atof().
setlocale(LC_NUMERIC, "C");
optind = 1; optind = 1;
while (-1 != while (-1 !=
(o = getopt_long(argc, argv, shortopts, longopts, &longopt_idx))) { (o = getopt_long(argc, argv, shortopts, longopts, &longopt_idx))) {
@ -3363,6 +3369,10 @@ get_cfg(int argc, char *const *argv) {
} }
} }
// Restore LC_NUMERIC
setlocale(LC_NUMERIC, lc_numeric_old);
free(lc_numeric_old);
// Range checking and option assignments // Range checking and option assignments
opts.fade_delta = max_i(opts.fade_delta, 1); opts.fade_delta = max_i(opts.fade_delta, 1);
opts.shadow_radius = max_i(opts.shadow_radius, 1); opts.shadow_radius = max_i(opts.shadow_radius, 1);