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fixed --create on block devices

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Gilles Grandou 2010-11-28 22:14:11 +01:00
parent 40817afd9b
commit 6cf7c45b2a
1 changed files with 13 additions and 0 deletions
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13
abootimg.c
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@ -22,6 +22,7 @@
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <linux/fs.h>
@ -267,9 +268,21 @@ void check_if_block_device(t_abootimg* img)
#ifdef HAS_BLKID
if (S_ISBLK(st.st_mode)) {
img->is_blkdev = 1;
char* type = blkid_get_tag_value(NULL, "TYPE", img->fname);
if (type)
abort_printf("%s: refuse to write on a valid partition type (%s)\n", img->fname, type);
int fd = open(img->fname, O_RDONLY);
if (fd == -1)
abort_perror(img->fname);
unsigned long long bsize = 0;
if (ioctl(fd, BLKGETSIZE64, &bsize))
abort_perror(img->fname);
img->size = bsize;
close(fd);
}
#endif
}