[hackers] [sbase] Adding mknod(1) || David Galos

From: <git_AT_suckless.org>
Date: Wed, 03 Jul 2013 08:03:05 +0200

commit 1fbe4e95eded282e20a18a773c792f2f91e6660b
Author: David Galos <galosd83_AT_students.rowan.edu>
Date: Wed Jul 3 02:02:36 2013 -0400

    Adding mknod(1)

diff --git a/Makefile b/Makefile
index 7f91bac..26c831f 100644
--- a/Makefile
+++ b/Makefile
_AT_@ -47,6 +47,7 @@ SRC = \
         mc.c \
         mkdir.c \
         mkfifo.c \
+ mknod.c \
         mv.c \
         nice.c \
         nl.c \
diff --git a/mknod.1 b/mknod.1
new file mode 100644
index 0000000..db71f2d
--- /dev/null
+++ b/mknod.1
_AT_@ -0,0 +1,40 @@
+.TH MKNOD 1 sbase\-VERSION
+.SH NAME
+mknod \- create a special device file
+
+.SH SYNOPSIS
+.B mknod
+.RB [ \-m
+.IR mode ]
+.I name
+.I type
+.I major
+.I minor
+
+.SH DESCRIPTION
+.B mknod
+Creates a special device file named
+.I name
+with major number
+.IR major ,
+and minor number
+.IR minor .
+
+.IR type
+specifies what kind of special file will be created,
+and must be one of:
+.TP
+.BR u \ or\ c
+A character device.
+.TP
+.BR b
+A block device.
+
+.SH OPTIONS
+.TP
+.B \-m "mode"
+Set the mode of the new file based on the octal value of
+.IR mode .
+
+.SH SEE ALSO
+.IR mknod (2)
diff --git a/mknod.c b/mknod.c
new file mode 100644
index 0000000..beb2ab7
--- /dev/null
+++ b/mknod.c
_AT_@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+#include "util.h"
+
+static void
+usage(void)
+{
+ eprintf("usage: mknod [-m mode] name type major minor
");
+}
+
+int
+main(int argc, char **argv)
+{
+ mode_t type, mode = 0644;
+ mode_t types['u'+1];
+ dev_t dev;
+
+ types['u'] = types['c'] = S_IFCHR;
+ types['b'] = S_IFBLK;
+
+ ARGBEGIN {
+ case 'm':
+ mode = estrtol(EARGF(usage()), 8);
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if(argc != 4)
+ usage();
+
+ if(strlen(argv[1]) != 1 || !strchr("ucb", argv[1][0]))
+ eprintf("mknod: '%s': invalid type
", argv[1]);
+ type = types[(unsigned)argv[1][0]];
+
+ dev = makedev(estrtol(argv[2], 0), estrtol(argv[3], 0));
+
+ if(mknod(argv[0], type|mode, dev) == -1)
+ eprintf("mknod: '%s':", argv[0]);
+ return 0;
+}
Received on Wed Jul 03 2013 - 08:03:05 CEST