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author | Dees Troy <dees_troy@teamw.in> | 2013-02-27 19:39:14 +0100 |
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committer | Gerrit Code Review <gerrit@5.9.244.119> | 2013-02-27 19:39:14 +0100 |
commit | 2cf31af56114cf997b10218db7c35ee047f5d400 (patch) | |
tree | 85f3b51e45ff8233922f2c0c151299868ca89371 /libblkid/wholedisk.c | |
parent | libtar - Fix extraction of hardlinks to use the prefix (diff) | |
parent | use libblkid to get filesystem type (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | libblkid/wholedisk.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/libblkid/wholedisk.c b/libblkid/wholedisk.c new file mode 100644 index 000000000..1dbb90c5c --- /dev/null +++ b/libblkid/wholedisk.c @@ -0,0 +1,62 @@ +/* + * No copyright is claimed. This code is in the public domain; do with + * it what you wish. + * + * Written by Karel Zak <kzak@redhat.com> + */ +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> + +#include "blkdev.h" +#include "wholedisk.h" + +int is_whole_disk_fd(int fd, const char *name) +{ +#ifdef HDIO_GETGEO + if (fd != -1) { + struct hd_geometry geometry; + int i = ioctl(fd, HDIO_GETGEO, &geometry); + if (i == 0) + return geometry.start == 0; + } +#endif + /* + * The "silly heuristic" is still sexy for us, because + * for example Xen doesn't implement HDIO_GETGEO for virtual + * block devices (/dev/xvda). + * + * -- kzak@redhat.com (23-Feb-2006) + */ + while (*name) + name++; + return !isdigit(name[-1]); +} + +int is_whole_disk(const char *name) +{ + int fd = -1, res = 0; +#ifdef HDIO_GETGEO + fd = open(name, O_RDONLY); + if (fd != -1) +#endif + res = is_whole_disk_fd(fd, name); + + if (fd != -1) + close(fd); + return res; +} + +#ifdef TEST_PROGRAM +int main(int argc, char **argv) +{ + if (argc < 2) { + fprintf(stderr, "usage: %s <device>\n", argv[0]); + exit(EXIT_FAILURE); + } + + printf("%s: is%s whole disk\n", argv[1], + is_whole_disk(argv[1]) ? "" : " NOT"); + exit(EXIT_SUCCESS); +} +#endif |