Show why umount failed. (baf6b6bd) · Commits · e / os / android_system_core

toolbox/umount.c

+6 −5

Original line number	Diff line number	Diff line
		@@ -6,6 +6,7 @@
		#include <string.h>
		#include <unistd.h>
		#include <linux/loop.h>
		#include <errno.h>

		#define LOOPDEV_MAXLEN 64
		#define LOOP_MAJOR 7
		@@ -36,7 +37,7 @@ static int is_loop_mount(const char* path, char *loopdev)

		f = fopen("/proc/mounts", "r");
		if (!f) {
		fprintf(stdout, "could not open /proc/mounts\n");
		fprintf(stdout, "could not open /proc/mounts: %s\n", strerror(errno));
		return -1;
		}

		@@ -67,7 +68,7 @@ int umount_main(int argc, char *argv[])

		loop = is_loop_mount(argv[1], loopdev);
		if (umount(argv[1])) {
		fprintf(stderr,"failed.\n");
		fprintf(stderr, "failed: %s\n", strerror(errno));
		return 1;
		}

		@@ -75,11 +76,11 @@ int umount_main(int argc, char *argv[])
		// free the loop device
		loop_fd = open(loopdev, O_RDONLY);
		if (loop_fd < 0) {
		perror("open loop device failed");
		fprintf(stderr, "open loop device failed: %s\n", strerror(errno));
		return 1;
		}
		if (ioctl(loop_fd, LOOP_CLR_FD, 0) < 0) {
		perror("ioctl LOOP_CLR_FD failed");
		fprintf(stderr, "ioctl LOOP_CLR_FD failed: %s\n", strerror(errno));
		return 1;
		}