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| author | Lennart Poettering <lennart@poettering.net> | 2019-05-21 18:04:04 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2019-12-02 10:06:12 +0100 |
| commit | 441ec80468d17a548c8c85e39a0b0e74b75f2650 (patch) | |
| tree | 2fecfd97547074e3ed6d0118066288ed9c13fd54 /src/shared/loop-util.c | |
| parent | loop-util: allow refreshing offset (diff) | |
| download | systemd-441ec80468d17a548c8c85e39a0b0e74b75f2650.tar.xz systemd-441ec80468d17a548c8c85e39a0b0e74b75f2650.zip | |
loop-util: add api for locking the block device with flock()
Diffstat (limited to 'src/shared/loop-util.c')
| -rw-r--r-- | src/shared/loop-util.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/shared/loop-util.c b/src/shared/loop-util.c index b1d07fe708..f9be08bf35 100644 --- a/src/shared/loop-util.c +++ b/src/shared/loop-util.c @@ -3,6 +3,7 @@ #include <errno.h> #include <fcntl.h> #include <linux/loop.h> +#include <sys/file.h> #include <sys/ioctl.h> #include "alloc-util.h" @@ -233,3 +234,15 @@ int loop_device_refresh_size(LoopDevice *d, uint64_t offset, uint64_t size) { return 0; } + +int loop_device_flock(LoopDevice *d, int operation) { + assert(d); + + if (d->fd < 0) + return -EBADF; + + if (flock(d->fd, operation) < 0) + return -errno; + + return 0; +} |