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-rw-r--r--lib/args.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/lib/args.c b/lib/args.c
index ae608e03..c551f868 100644
--- a/lib/args.c
+++ b/lib/args.c
@@ -108,7 +108,7 @@ struct getoptflagstate
struct opts *opts;
struct longopts *longopts;
int noerror, nodash_now, stopearly;
- unsigned excludes;
+ unsigned excludes, requires;
};
// Use getoptflagstate to parse parse one command line option from argv
@@ -289,7 +289,10 @@ void parse_optflaglist(struct getoptflagstate *gof)
// (This goes right to left so we need the whole list before we can start.)
idx = 0;
for (new = gof->opts; new; new = new->next) {
- new->dex[1] = 1<<idx++;
+ unsigned u = 1<<idx++;
+
+ new->dex[1] = u;
+ if (new->flags & 1) gof->requires |= u;
if (new->type) {
new->arg = (void *)nextarg;
*(nextarg++) = new->val[2].l;
@@ -442,6 +445,16 @@ notflag:
gof.minargs, letters[!(gof.minargs-1)]);
if (toys.optc>gof.maxargs)
error_exit("Max %d argument%s", gof.maxargs, letters[!(gof.maxargs-1)]);
+ if (gof.requires && !(gof.requires & toys.optflags)) {
+ struct opts *req;
+ char needs[32], *s = needs;
+
+ for (req = gof.opts; req; req = req->next)
+ if (req->flags & 1) *(s++) = req->c;
+ *s = 0;
+
+ error_exit("Needs %s-%s", s[1] ? "one of " : "", needs);
+ }
toys.exithelp = 0;
if (CFG_TOYBOX_FREE) {