From: Ben Gras <ben@minix3.org>
Date: Mon, 13 Mar 2006 14:41:54 +0000 (+0000)
Subject: Create a ramdisk using 'ramdisk'.
X-Git-Tag: v3.1.2a~249
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/man.host.html?a=commitdiff_plain;h=34b1f1c738689dfcaf8b927ddc6a9391d5123e07;p=minix.git

Create a ramdisk using 'ramdisk'.
---

diff --git a/commands/simple/Makefile b/commands/simple/Makefile
index 1239f1de2..a1649d6dd 100755
--- a/commands/simple/Makefile
+++ b/commands/simple/Makefile
@@ -147,6 +147,7 @@ ALL	= \
 	proto \
 	pwd \
 	pwdauth \
+	ramdisk \
 	rarpd \
 	rcp \
 	rawspeed \
@@ -643,6 +644,10 @@ pwdauth:	pwdauth.c
 	$(CCLD) -o $@ $?
 	@install -S 4kw $@
 
+ramdisk:	ramdisk.c
+	$(CCLD) -o $@ ramdisk.c
+	@install -S 4kw $@
+
 rarpd:	rarpd.c
 	$(CCLD) -o $@ rarpd.c
 	@install -S 4kw $@
@@ -1029,6 +1034,7 @@ install:	\
 	/usr/bin/proto \
 	/usr/bin/pwd \
 	/usr/lib/pwdauth \
+	/usr/bin/ramdisk \
 	/usr/bin/rarpd \
 	/usr/bin/rcp \
 	/usr/bin/rawspeed \
@@ -1472,6 +1478,9 @@ install:	\
 /usr/lib/pwdauth:	pwdauth
 	install -cs -o root -m 4755 $? $@
 
+/usr/bin/ramdisk:	ramdisk
+	install -cs -o bin $? $@
+
 /usr/bin/rarpd:	rarpd
 	install -cs -o bin $? $@
 
diff --git a/commands/simple/ramdisk.c b/commands/simple/ramdisk.c
new file mode 100644
index 000000000..3210f3201
--- /dev/null
+++ b/commands/simple/ramdisk.c
@@ -0,0 +1,38 @@
+
+#include <minix/paths.h>
+
+#include <sys/ioc_memory.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <stdlib.h>
+
+int
+main(int argc, char *argv[])
+{
+	int fd;
+	signed long size;
+	if((fd=open(_PATH_RAMDISK, O_RDONLY)) < 0) {
+		perror(_PATH_RAMDISK);
+		return 1;
+	}
+
+	if(argc != 2) {
+		fprintf(stderr, "usage: %s <size in bytes>\n", argv[0]);
+		return 1;
+	}
+
+	size = atol(argv[1]);
+
+	if(size <= 0) {
+		fprintf(stderr, "size should be positive.\n");
+		return 1;
+	}
+
+	if(ioctl(fd, MIOCRAMSIZE, &size) < 0) {
+		perror("MIOCRAMSIZE");
+		return 1;
+	}
+
+	return 0;
+}
+