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authorMiklos Szeredi <miklos@szeredi.hu>2005-02-08 16:15:58 +0000
committerMiklos Szeredi <miklos@szeredi.hu>2005-02-08 16:15:58 +0000
commita464d3ec2c93e65da4ae752ac126c30e9897d63b (patch)
tree89f968f340ee8d4d381b8348a83941d0c040b33a /opts.c
parentd5696036a516d330305ec2cd2fedc7d934d36f1d (diff)
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option parsing
Diffstat (limited to 'opts.c')
-rw-r--r--opts.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/opts.c b/opts.c
new file mode 100644
index 0000000..3976d3a
--- /dev/null
+++ b/opts.c
@@ -0,0 +1,99 @@
+/*
+ Mount option parsing
+ Copyright (C) 2004 Miklos Szeredi <miklos@szeredi.hu>
+
+ This program can be distributed under the terms of the GNU GPL.
+ See the file COPYING.
+*/
+
+#include "opts.h"
+#include <string.h>
+#include <stdlib.h>
+
+static int process_option(char *arg, struct opt opts[], int case_sensitive)
+{
+ int i;
+ char *eq = strchr(arg, '=');
+ if (eq)
+ *eq = '\0';
+
+ for (i = 0; opts[i].optname != NULL; i++) {
+ if (case_sensitive) {
+ if (strcmp(opts[i].optname, arg) == 0)
+ break;
+ } else if (strcasecmp(opts[i].optname, arg) == 0)
+ break;
+ }
+ if (opts[i].optname == NULL) {
+ if (eq)
+ *eq = '=';
+ return 0;
+ }
+ opts[i].present = 1;
+ if (eq) {
+ if (opts[i].value)
+ free(opts[i].value);
+ opts[i].value = strdup(eq+1);
+ }
+ return 1;
+}
+
+static int process_option_group(char *arg, struct opt opts[],
+ int case_sensitive)
+{
+ int remove = 1;
+ char *prevcomma = NULL;
+ while (1) {
+ int remove_one;
+ char *comma = strchr(arg, ',');
+ if (comma)
+ *comma = '\0';
+ remove_one = process_option(arg, opts, case_sensitive);
+ if (remove_one) {
+ if (comma)
+ memmove(arg, comma + 1, strlen(comma + 1));
+ } else {
+ remove = 0;
+ if (comma)
+ arg = comma + 1;
+ }
+ if (!remove_one && prevcomma)
+ *prevcomma = ',';
+ if (!comma)
+ break;
+ prevcomma = comma;
+ }
+ return remove;
+}
+
+void process_options(int *argcp, char *argv[], struct opt opts[],
+ int case_sensitive)
+{
+ int argctr;
+ int newargctr;
+
+ for (argctr = 1, newargctr = 1; argctr < *argcp; argctr++) {
+ char *arg = argv[argctr];
+ int removed = 0;
+ if (arg[0] == '-' && arg[1] == 'o') {
+ if (arg[2])
+ removed = process_option_group(arg+2, opts, case_sensitive);
+ else {
+ if (argctr + 1 < *argcp) {
+ argctr++;
+ arg = argv[argctr];
+ removed = process_option_group(arg, opts, case_sensitive);
+ if (!removed && argctr != newargctr)
+ argv[newargctr++] = argv[argctr-1];
+ }
+ }
+ }
+ if (!removed) {
+ if(argctr != newargctr)
+ argv[newargctr] = arg;
+ newargctr++;
+ }
+ }
+ *argcp = newargctr;
+}
+