utils-std

commit: e6b78df2c1aa4740ef1f14d6921fbefc93b71aec
parent 9dcc738abc5744c3f5ce91e27132cb185b9d2036
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Fri, 25 Jul 2025 01:15:30 +0200

cmd/head: add support for long options

Diffstat:
M
cmd/head.c
21
+++++++++++++++++++++

1 file changed, 21 insertions(+), 0 deletions(-)
diff --git a/cmd/head.c b/cmd/head.c
@@ -4,6 +4,7 @@
 
 #define _POSIX_C_SOURCE 200809L
 
+#include "../config.h"
 #include "../libutils/fs.h" // auto_fd_copy
 #include "../libutils/getopt_nolong.h"
 #include "../libutils/truncation.h" // apply_size_suffix
@@ -16,6 +17,9 @@
 #include <stdlib.h> // strtoul
 #include <string.h> // strerror
 #include <unistd.h> // read
+#ifdef HAS_GETOPT_LONG
+#include <getopt.h>
+#endif
 
 static const char *header_fmt = "==> %s <==\n";
 
@@ -253,7 +257,24 @@ main(int argc, char *argv[])
 			continue;
 		}
 
+#ifdef HAS_GETOPT_LONG
+		// Strictly for GNUisms compatibility so no long-only options
+		// clang-format off
+		static struct option opts[] = {
+			{"bytes", required_argument, NULL, 'c'},
+			{"lines", optional_argument, NULL, 'n'},
+			{"quiet", no_argument, NULL, 'q'},
+			{"silent", no_argument, NULL, 'q'},
+			{"zero-terminated", no_argument, NULL, 'z'},
+			{0, 0, 0, 0},
+		};
+		// clang-format on
+
+		// Need + as first character to get POSIX-style option parsing
+		int c = getopt_long(argc, argv, "+:qvc:n:z", opts, NULL);
+#else
 		int c = getopt_nolong(argc, argv, ":qvc:n:z");
+#endif
 		if(c == -1) break;
 
 		switch(c)