ubase

suckless linux base utils
git clone git://git.2f30.org/ubase.git
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commit c88ba3750ec6e139034e468d5a56166268188981
parent 35a94791414922982718280d86fb77e3b5dc7fe4
Author: sin <sin@2f30.org>
Date:   Thu Jun 26 16:16:15 +0100

Add freeramdisk(8)

Diffstat:
Makefile | 2++
freeramdisk.8 | 8++++++++
freeramdisk.c | 37+++++++++++++++++++++++++++++++++++++
3 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile @@ -31,6 +31,7 @@ SRC = \ eject.c \ fallocate.c \ free.c \ + freeramdisk.c \ fsfreeze.c \ getty.c \ halt.c \ @@ -93,6 +94,7 @@ MAN1 = \ MAN8 = \ ctrlaltdel.8 \ + freeramdisk.8 \ fsfreeze.8 \ getty.8 \ halt.8 \ diff --git a/freeramdisk.8 b/freeramdisk.8 @@ -0,0 +1,8 @@ +.TH FREERAMDISK 8 ubase-VERSION +.SH NAME +\fBfreeramdisk\fR - Free memory used by the loadlin ramdisk +.SH SYNOPSIS +\fBfreeramdisk\fR +.SH DESCRIPTION +\fBfreeramdisk\fR frees the memory that is used by the ramdisk. +It uses the \fI/dev/ram\fR device node. diff --git a/freeramdisk.c b/freeramdisk.c @@ -0,0 +1,37 @@ +/* See LICENSE file for copyright and license details. */ +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/ioctl.h> +#include <sys/mount.h> +#include <sys/types.h> +#include <unistd.h> +#include "util.h" + +static void +usage(void) +{ + eprintf("usage: %s\n", argv0); +} + +int +main(int argc, char *argv[]) +{ + char *dev = "/dev/ram"; + int fd; + + ARGBEGIN { + default: + usage(); + } ARGEND; + + if (argc != 0) + usage(); + + if ((fd = open(dev, O_RDWR)) < 0) + eprintf("open: %s:", dev); + if (ioctl(fd, BLKFLSBUF, dev) < 0) + eprintf("BLKFLSBUF %s:", dev); + close(fd); + return EXIT_SUCCESS; +}