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| author | Karel Zak | 2017-06-30 11:49:12 +0200 |
|---|---|---|
| committer | Karel Zak | 2017-07-14 11:34:55 +0200 |
| commit | b9da1532546630cda5d9dd9863ba2e6477a60bba (patch) | |
| tree | 793c4643d2b690b086ef9cb40ed3b3a63a5294f7 /libfdisk/src/context.c | |
| parent | libfdisk: remove unnecessary fstat() call (diff) | |
| download | kernel-qcow2-util-linux-b9da1532546630cda5d9dd9863ba2e6477a60bba.tar.gz kernel-qcow2-util-linux-b9da1532546630cda5d9dd9863ba2e6477a60bba.tar.xz kernel-qcow2-util-linux-b9da1532546630cda5d9dd9863ba2e6477a60bba.zip | |
libfdisk: add fdisk_device_is_used()
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'libfdisk/src/context.c')
| -rw-r--r-- | libfdisk/src/context.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/libfdisk/src/context.c b/libfdisk/src/context.c index e8dfa0e69..1ebc1b981 100644 --- a/libfdisk/src/context.c +++ b/libfdisk/src/context.c @@ -2,6 +2,8 @@ # include <blkid.h> #endif +#include "blkdev.h" +#include "loopdev.h" #include "fdiskP.h" @@ -734,6 +736,38 @@ int fdisk_reread_partition_table(struct fdisk_context *cxt) /** + * fdisk_device_is_used: + * @cxt: context + * + * On systems where is no BLKRRPART ioctl the function returns zero and + * sets errno to ENOSYS. + * + * Returns: 1 if the device assigned to the context is used by system, or 0. + */ +int fdisk_device_is_used(struct fdisk_context *cxt) +{ + int rc = 0; + + assert(cxt); + assert(cxt->dev_fd >= 0); + + errno = 0; + +#ifdef BLKRRPART + /* it seems kernel always return EINVAL for BLKRRPART on loopdevices */ + if (S_ISBLK(cxt->dev_st.st_mode) + && major(cxt->dev_st.st_rdev) != LOOPDEV_MAJOR) { + DBG(CXT, ul_debugobj(cxt, "calling re-read ioctl")); + rc = ioctl(cxt->dev_fd, BLKRRPART) != 0; + } +#else + errno = ENOSYS; +#endif + DBG(CXT, ul_debugobj(cxt, "device used: %s [errno=%d]", rc ? "TRUE" : "FALSE", errno)); + return rc; +} + +/** * fdisk_is_readonly: * @cxt: context * |