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-rw-r--r--toolbox/mkswap.c93
1 files changed, 0 insertions, 93 deletions
diff --git a/toolbox/mkswap.c b/toolbox/mkswap.c
deleted file mode 100644
index 0904152..0000000
--- a/toolbox/mkswap.c
+++ /dev/null
@@ -1,93 +0,0 @@
-#include <stdio.h>
-#include <unistd.h>
-#include <sys/swap.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-/* XXX This needs to be obtained from kernel headers. See b/9336527 */
-struct linux_swap_header {
- char bootbits[1024]; /* Space for disklabel etc. */
- uint32_t version;
- uint32_t last_page;
- uint32_t nr_badpages;
- unsigned char sws_uuid[16];
- unsigned char sws_volume[16];
- uint32_t padding[117];
- uint32_t badpages[1];
-};
-
-#define MAGIC_SWAP_HEADER "SWAPSPACE2"
-#define MAGIC_SWAP_HEADER_LEN 10
-#define MIN_PAGES 10
-
-int mkswap_main(int argc, char **argv)
-{
- int err = 0;
- int fd;
- ssize_t len;
- off_t swap_size;
- int pagesize;
- struct linux_swap_header sw_hdr;
-
- if (argc != 2) {
- fprintf(stderr, "Usage: %s <filename>\n", argv[0]);
- return -EINVAL;
- }
-
- fd = open(argv[1], O_WRONLY);
- if (fd < 0) {
- err = errno;
- fprintf(stderr, "Cannot open %s\n", argv[1]);
- return err;
- }
-
- pagesize = getpagesize();
- /* Determine the length of the swap file */
- swap_size = lseek(fd, 0, SEEK_END);
- if (swap_size < MIN_PAGES * pagesize) {
- fprintf(stderr, "Swap file needs to be at least %dkB\n",
- (MIN_PAGES * pagesize) >> 10);
- err = -ENOSPC;
- goto err;
- }
- if (lseek(fd, 0, SEEK_SET)) {
- err = errno;
- fprintf(stderr, "Can't seek to the beginning of the file\n");
- goto err;
- }
-
- memset(&sw_hdr, 0, sizeof(sw_hdr));
- sw_hdr.version = 1;
- sw_hdr.last_page = (swap_size / pagesize) - 1;
-
- len = write(fd, &sw_hdr, sizeof(sw_hdr));
- if (len != sizeof(sw_hdr)) {
- err = errno;
- fprintf(stderr, "Failed to write swap header into %s\n", argv[1]);
- goto err;
- }
-
- /* Write the magic header */
- if (lseek(fd, pagesize - MAGIC_SWAP_HEADER_LEN, SEEK_SET) < 0) {
- err = errno;
- fprintf(stderr, "Failed to seek into %s\n", argv[1]);
- goto err;
- }
-
- len = write(fd, MAGIC_SWAP_HEADER, MAGIC_SWAP_HEADER_LEN);
- if (len != MAGIC_SWAP_HEADER_LEN) {
- err = errno;
- fprintf(stderr, "Failed to write magic swap header into %s\n", argv[1]);
- goto err;
- }
-
- if (fsync(fd) < 0) {
- err = errno;
- fprintf(stderr, "Failed to sync %s\n", argv[1]);
- goto err;
- }
-err:
- close(fd);
- return err;
-}