X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fopt%2Fopt.c;h=94eb0d5ab7f2808e0f1a4fb155b617cebf9422b6;hb=d638b7e4d67ea147a35e8e4c3b41e85e35cf9d97;hp=db7686be10eba44a08cec27c945aff7002a5b0fb;hpb=ac9d55d8c5af9697be8c4dd4f27de61e3cb8bf95;p=ccan

diff --git a/ccan/opt/opt.c b/ccan/opt/opt.c
index db7686be..94eb0d5a 100644
--- a/ccan/opt/opt.c
+++ b/ccan/opt/opt.c
@@ -4,7 +4,6 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
-#include <err.h>
 #include <assert.h>
 #include <stdarg.h>
 #include <stdint.h>
@@ -102,32 +101,40 @@ const char *next_sopt(const char *p, unsigned *i)
 	return p;
 }
 
+/* Avoids dependency on err.h or ccan/err */
+#ifndef failmsg
+#define failmsg(fmt, ...) \
+	do { fprintf(stderr, fmt, __VA_ARGS__); exit(1); } while(0)
+#endif
+
 static void check_opt(const struct opt_table *entry)
 {
 	const char *p;
 	unsigned len;
 
-	if (entry->type != OPT_HASARG && entry->type != OPT_NOARG)
-		errx(1, "Option %s: unknown entry type %u",
-		     entry->names, entry->type);
+	if (entry->type != OPT_HASARG && entry->type != OPT_NOARG
+	    && entry->type != (OPT_EARLY|OPT_HASARG)
+	    && entry->type != (OPT_EARLY|OPT_NOARG))
+		failmsg("Option %s: unknown entry type %u",
+			entry->names, entry->type);
 
 	if (!entry->desc)
-		errx(1, "Option %s: description cannot be NULL", entry->names);
+		failmsg("Option %s: description cannot be NULL", entry->names);
 
 
 	if (entry->names[0] != '-')
-		errx(1, "Option %s: does not begin with '-'", entry->names);
+		failmsg("Option %s: does not begin with '-'", entry->names);
 
 	for (p = first_name(entry->names, &len); p; p = next_name(p, &len)) {
 		if (*p == '-') {
 			if (len == 1)
-				errx(1, "Option %s: invalid long option '--'",
-				     entry->names);
+				failmsg("Option %s: invalid long option '--'",
+					entry->names);
 			opt_num_long++;
 		} else {
 			if (len != 1)
-				errx(1, "Option %s: invalid short option"
-				     " '%.*s'", entry->names, len+1, p-1);
+				failmsg("Option %s: invalid short option"
+					" '%.*s'", entry->names, len+1, p-1);
 			opt_num_short++;
 			if (entry->type == OPT_HASARG)
 				opt_num_short_arg++;
@@ -135,8 +142,8 @@ static void check_opt(const struct opt_table *entry)
 		/* Don't document args unless there are some. */
 		if (entry->type == OPT_NOARG) {
 			if (p[len] == ' ' || p[len] == '=')
-				errx(1, "Option %s: does not take arguments"
-				     " '%s'", entry->names, p+len+1);
+				failmsg("Option %s: does not take arguments"
+					" '%s'", entry->names, p+len+1);
 		}
 	}
 }
@@ -196,7 +203,28 @@ bool opt_parse(int *argc, char *argv[], void (*errlog)(const char *fmt, ...))
 	/* This helps opt_usage. */
 	opt_argv0 = argv[0];
 
-	while ((ret = parse_one(argc, argv, &offset, errlog)) == 1);
+	while ((ret = parse_one(argc, argv, 0, &offset, errlog)) == 1);
+
+	/* parse_one returns 0 on finish, -1 on error */
+	return (ret == 0);
+}
+
+bool opt_early_parse(int argc, char *argv[],
+		     void (*errlog)(const char *fmt, ...))
+{
+	int ret;
+	unsigned off = 0;
+	char **tmpargv = malloc(sizeof(argv[0]) * (argc + 1));
+
+	/* We could avoid a copy and skip instead, but this is simple. */
+	memcpy(tmpargv, argv, sizeof(argv[0]) * (argc + 1));
+
+	/* This helps opt_usage. */
+	opt_argv0 = argv[0];
+
+	while ((ret = parse_one(&argc, tmpargv, OPT_EARLY, &off, errlog)) == 1);
+
+	free(tmpargv);
 
 	/* parse_one returns 0 on finish, -1 on error */
 	return (ret == 0);