utils

commit: 4087f6a16718ffe7ca31ec4909ad7701e925b84b
parent 83e4725713546b8b662811d5051011bf0a73c105
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Wed, 28 Jun 2023 21:05:18 +0200

coreutils.txt: tee and touch are Done

Diffstat:
A
cmd/nproc.c
51
+++++++++++++++++++++++++++++++++++++++++++++++++++
M
coreutils.txt
6
+++---

2 files changed, 54 insertions(+), 3 deletions(-)
diff --git a/cmd/nproc.c b/cmd/nproc.c
@@ -0,0 +1,51 @@
+// Collection of Unix tools, comparable to coreutils
+// SPDX-FileCopyrightText: 2017-2022 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+
+#define _POSIX_C_SOURCE 200809L
+#include <stdio.h>  // printf
+#include <unistd.h> // sysconf, getopt, opt*
+
+void
+usage()
+{
+	fprintf(stderr, "Usage: nproc [-a]\n");
+}
+
+int
+main(int argc, char *argv[])
+{
+	// _SC_NPROCESSORS_CONF &_SC_NPROCESSORS_ONLN aren't in POSIX yet but have been accepted
+	// https://www.austingroupbugs.net/view.php?id=339
+	int target = _SC_NPROCESSORS_ONLN;
+
+	int c;
+	while((c = getopt(argc, argv, ":a")) != EOF)
+	{
+		switch(c)
+		{
+		case 'a': // all processors
+			target = _SC_NPROCESSORS_CONF;
+			break;
+		case ':':
+			fprintf(stderr, "nproc: Error: Missing operand for option: '-%c'\n", optopt);
+			usage();
+			return 1;
+		case '?':
+			fprintf(stderr, "nproc: Error: Unrecognised option: '-%c'\n", optopt);
+			usage();
+			return 1;
+		}
+	}
+
+	long np = sysconf(target);
+	if(np < 0)
+	{
+		perror("sysconf");
+		return 1;
+	}
+
+	printf("%ld\n", np);
+
+	return 0;
+}
diff --git a/coreutils.txt b/coreutils.txt
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2017-2022 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
+# SPDX-FileCopyrightText: 2017-2023 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
 # SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
 [: ?, see test
 arch: No
@@ -85,10 +85,10 @@ sum: No
 sync: Done
 tac: Todo
 tail: ?
-tee: Todo
+tee: Done
 test: ?
 timeout: ?
-touch: Todo (futimens(3p))
+touch: Done
 tr: Todo
 true: Done
 truncate: Todo