Add devsize

commands/simple/Makefile

@@ -68,6 +68,7 @@ ALL	= \
 	dd \
 	decomp16 \
 	dev2name \
+	devsize \
 	df \
 	dhrystone \
 	diff \
@@ -321,6 +322,10 @@ dev2name:	dev2name.c
 	$(CCLD) -o $@ $?
 	@install -S 4kw $@
 
+devsize:	devsize.c
+	$(CCLD) -o $@ $?
+	@install -S 4kw $@
+
 df:	df.c
 	$(CCLD) -I$(SYS) -o $@ $?
 	@install -S 4kw $@
@@ -897,6 +902,7 @@ install:	\
 	/usr/bin/dd \
 	/usr/bin/decomp16 \
 	/bin/dev2name \
+	/usr/bin/devsize \
 	/usr/bin/df \
 	/usr/bin/dhrystone \
 	/usr/bin/diff \
@@ -1161,6 +1167,9 @@ install:	\
 /bin/dev2name:	dev2name
 	install -cs -o bin $? $@
 
+/usr/bin/devsize:	devsize
+	install -cs -o bin $? $@
+
 /usr/bin/decomp16:	decomp16
 	install -cs -o bin $? $@
 

commands/simple/devsize.c

@@ -0,0 +1,57 @@
+/* Ben Gras
+ *
+ * Based on sizeup() in mkfs.c.
+ */
+
+#include <sys/types.h>
+#include <sys/dir.h>
+#include <sys/stat.h>
+#include <ibm/partition.h>
+#include <minix/partition.h>
+#include <minix/u64.h>
+#include <sys/ioc_disk.h>
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+unsigned long sizeup(char *);
+
+int main(int argc, char *argv[])
+{
+  int sec;
+
+  if(argc != 2) {
+	fprintf(stderr, "Usage: %s <device>\n", argv[0]);
+	return 1;
+  }
+
+  printf("%lu\n", sizeup(argv[optind]));
+  return 0;
+}	
+
+
+unsigned long sizeup(device)
+char *device;
+{
+  int fd;
+  struct partition entry;
+  unsigned long d;
+  struct stat st;
+
+  if ((fd = open(device, O_RDONLY)) == -1) {
+  	perror("sizeup open");
+  	exit(1);
+  }
+  if (ioctl(fd, DIOCGETP, &entry) == -1) {
+  	perror("sizeup ioctl");
+  	exit(1);
+  }
+  close(fd);
+  d = div64u(entry.size, 512);
+  return d;
+}