1 files changed, 30 insertions, 11 deletions

diff --git a/main.c b/main.c
index 6adab095..23e3dc78 100644
--- a/main.c
+++ b/main.c
@@ -55,9 +55,9 @@ NODE *ENVIRON_node, *IGNORECASE_node;
 NODE *ARGC_node, *ARGV_node, *ARGIND_node;
 NODE *FIELDWIDTHS_node;
 
-int NF;
-int NR;
-int FNR;
+long NF;
+long NR;
+long FNR;
 int IGNORECASE;
 char *RS;
 char *OFS;
@@ -134,11 +134,13 @@ char **argv;
 {
 	int c;
 	char *scan;
+	/* the + on the front tells GNU getopt not to rearrange argv */
+	const char *optlist = "+F:f:v:W:m:";
+	int stopped_early = 0;
+	int old_optind;
 	extern int optind;
 	extern int opterr;
 	extern char *optarg;
-	const char *optlist = "+F:f:v:W:m:";
-	int stopped_early = 0;
 
 #ifdef __EMX__
 	_response(&argc, &argv);
@@ -188,10 +190,10 @@ char **argv;
 	/* we do error messages ourselves on invalid options */
 	opterr = 0;
 
-	/* the + on the front tells GNU getopt not to rearrange argv */
-	for (optopt = 0;
+	/* option processing. ready, set, go! */
+	for (optopt = 0, old_optind = 1;
 	     (c = getopt_long(argc, argv, optlist, optab, NULL)) != EOF;
-	     optopt = 0) {
+	     optopt = 0, old_optind = optind) {
 		if (do_posix)
 			opterr = 1;
 		switch (c) {
@@ -254,7 +256,7 @@ char **argv;
 			break;
 
 		case 's':
-			if (strlen(optarg) == 0)
+			if (optarg[0] == '\0')
 				warning("empty argument to --source ignored");
 			else {
 				srcfiles[++numfiles].stype = CMDLINE;
@@ -291,7 +293,12 @@ char **argv;
 			 */
 			if (! do_posix
 			    && (optopt == 0 || strchr(optlist, optopt) == NULL)) {
-				optind--;
+				/*
+				 * can't just do optind--. In case of an
+				 * option with >=2 letters, getopt_long
+				 * won't have incremented optind.
+				 */
+				optind = old_optind;
 				stopped_early = 1;
 				goto out;
 			} else if (optopt)
@@ -309,6 +316,14 @@ out:
 	if (do_nostalgia)
 		nostalgia();
 
+	/* check for POSIXLY_CORRECT environment variable */
+	if (! do_posix && getenv("POSIXLY_CORRECT") != NULL) {
+		do_posix = 1;
+		if (do_lint)
+			warning(
+	"environment variable `POSIXLY_CORRECT' set: turning on --posix");
+	}
+
 	/* POSIX compliance also implies no Unix extensions either */
 	if (do_posix)
 		do_unix = 1;
@@ -336,6 +351,10 @@ out:
 	/* Set up the field variables */
 	init_fields();
 
+	if (do_lint && begin_block == NULL && expression_value == NULL
+	     && end_block == NULL)
+		warning("no program");
+
 	if (begin_block) {
 		in_begin_rule = 1;
 		(void) interpret(begin_block);
@@ -718,7 +737,7 @@ char *optstr;
 			if (strncasecmp(cp, "source=", 7) != 0)
 				goto unknown;
 			cp += 7;
-			if (strlen(cp) == 0)
+			if (cp[0] == '\0')
 				warning("empty argument to -Wsource ignored");
 			else {
 				srcfiles[++numfiles].stype = CMDLINE;