utils

commit: b7afc99c488c8c2d4c78fad78b38146b523f3c6e
parent: a85da21135d7879a2b9d369d5351def4c7a023e6
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Thu,  1 Mar 2018 18:10:50 +0100

src/date.c: init with POSIX arguments/options

But screw POSIX locale (whatever that is) that should use this western-legacy format "%a %b %e %H:%M:%S %Z %Y"

Diffstat:
A
src/date.c
37
+++++++++++++++++++++++++++++++++++++

1 file changed, 37 insertions(+), 0 deletions(-)
diff --git a/src/date.c b/src/date.c
@@ -0,0 +1,37 @@
+/* Copyright CC-BY-SA-4.0 2017-2018 Haelwenn (lanodan) Monnier <contact@hacktivis.me> */
+#include <locale.h> /* setlocale() */
+#include <stdio.h>  /* BUFSIZ, perror(), puts() */
+#include <stdlib.h> /* exit() */
+#include <time.h>   /* time, localtime, tm, strftime */
+
+int main(int argc, char *argv[]) {
+	char outstr[BUFSIZ];
+	time_t now   = time(NULL);
+	struct tm *tm = localtime(&now);
+	char *format = "%c";
+
+	setlocale(LC_ALL, "");
+
+	for(int i = (argc-1);i>0;i--) {
+		if ((argv[i][0] == '-') && (argv[i][1] == 'u')) {
+			tm = gmtime(&now);
+		}
+
+		if (argv[i][0] == '+') {
+			/* format = argv[1][1,]; */
+			format = &argv[i][1];
+		}
+	}
+
+	if (tm == NULL) {
+		perror("localtime");
+		exit(EXIT_FAILURE);
+	}
+
+	if (strftime(outstr, sizeof(outstr), format, tm) == 0) {
+		perror("strftime returned 0");
+		exit(EXIT_FAILURE);
+	}
+
+	return puts(outstr);
+}