From dc81049ccead5d715520623e5541da46ab38db7d Mon Sep 17 00:00:00 2001
From: Lieuwe Rooijakkers <lieuwerooijakkers@gmail.com>
Date: Sun, 11 Aug 2024 00:30:17 +0200
Subject: grijp: exit code of 1 when no matches found

---
 src/grijp.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/grijp.c b/src/grijp.c
index 0884be6..feb92c1 100644
--- a/src/grijp.c
+++ b/src/grijp.c
@@ -29,6 +29,8 @@ static void **patterns = NULL; // can hold `char*` or `regex_t*`
 
 static size_t nfiles;
 
+static bool anyMatch = false;
+
 static void usage(FILE *f) {
   fprintf(f,
       "Gebruik: grijp [-hV] [PATRONEN] [BESTAND]...\n"
@@ -78,7 +80,7 @@ static char** parse_options(int argc, char **argv) {
       case '?':
         fprintf(stderr, "grijp: Ongeldige optie: -%c\n", optopt);
         usage(stderr);
-        exit(1);
+        exit(2);
     }
   }
 
@@ -113,7 +115,7 @@ static void compile_regexps() {
 
     if (regcomp(regexp, patterns[i], flags) != 0) {
       fprintf(stderr, "grijp: fout tijdens compileren van reguliere expressie\n");
-      exit(1);
+      exit(2);
     }
 
     free(patterns[i]);
@@ -138,10 +140,10 @@ static int process(char *fname, bool isstdin) {
   FILE *stream = isstdin ? stdin : fopen(fname, binary ? "rb" : "r");
   if (stream == NULL && !isstdin) {
     fprintf(stderr, "grijp: %s: fout tijdens openen bestand\n", fname);
-    return 1;
+    return 2;
   } else if (stream == NULL && isstdin) {
     fprintf(stderr, "grijp: fout tijdens lezen standaard invoer\n");
-    return 1;
+    return 2;
   }
 
   char *line = NULL;
@@ -163,6 +165,7 @@ static int process(char *fname, bool isstdin) {
       if (invert) matches = !matches;
 
       if (matches) {
+        anyMatch = true;
         printMatch(fname, line);
         if (list) goto done;
       }
@@ -179,7 +182,7 @@ int entry_grijp(int argc, char **argv) {
   char **args = parse_options(argc, argv);
   if (*args == NULL) {
     fprintf(stderr, "grijp: geen patroon gegeven\n");
-    return 1;
+    return 2;
   }
 
   gpats = *args;
@@ -204,5 +207,7 @@ int entry_grijp(int argc, char **argv) {
   }
   for (size_t i = 0; i < npat; i++) free(patterns[i]);
   free(patterns);
+
+  if (res == 0 && !anyMatch) res = 1;
   return res;
 }
-- 
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