diff options
Diffstat (limited to 'tools/kwboot.c')
| -rw-r--r-- | tools/kwboot.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/tools/kwboot.c b/tools/kwboot.c index 9f2dd2d..b697d3b 100644 --- a/tools/kwboot.c +++ b/tools/kwboot.c @@ -1591,8 +1591,8 @@ static void * kwboot_read_image(const char *path, size_t *size, size_t reserve) { int rc, fd; - struct stat st; void *img; + off_t len; off_t tot; rc = -1; @@ -1602,31 +1602,34 @@ kwboot_read_image(const char *path, size_t *size, size_t reserve) if (fd < 0) goto out; - rc = fstat(fd, &st); - if (rc) + len = lseek(fd, 0, SEEK_END); + if (len == (off_t)-1) + goto out; + + if (lseek(fd, 0, SEEK_SET) == (off_t)-1) goto out; - img = malloc(st.st_size + reserve); + img = malloc(len + reserve); if (!img) goto out; tot = 0; - while (tot < st.st_size) { - ssize_t rd = read(fd, img + tot, st.st_size - tot); + while (tot < len) { + ssize_t rd = read(fd, img + tot, len - tot); if (rd < 0) goto out; tot += rd; - if (!rd && tot < st.st_size) { + if (!rd && tot < len) { errno = EIO; goto out; } } rc = 0; - *size = st.st_size; + *size = len; out: if (rc && img) { free(img); |