Kernel+LibC: Add posix_fallocate syscall

2 files changed, 8 insertions, 0 deletions

diff --git a/Userland/Libraries/LibC/fcntl.cpp b/Userland/Libraries/LibC/fcntl.cpp
index e67a82d357..97fe440606 100644
--- a/Userland/Libraries/LibC/fcntl.cpp
+++ b/Userland/Libraries/LibC/fcntl.cpp
@@ -104,6 +104,13 @@ int posix_fadvise(int fd, off_t offset, off_t len, int advice)
     return 0;
 }
 
+// https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_fallocate.html
+int posix_fallocate(int fd, off_t offset, off_t len)
+{
+    // posix_fallocate does not set errno.
+    return static_cast<int>(syscall(SC_posix_fallocate, fd, &offset, &len));
+}
+
 // https://pubs.opengroup.org/onlinepubs/9699919799/functions/utimensat.html
 int utimensat(int dirfd, char const* path, struct timespec const times[2], int flag)
 {
diff --git a/Userland/Libraries/LibC/fcntl.h b/Userland/Libraries/LibC/fcntl.h
index 3704d6a7a7..bf640c79f5 100644
--- a/Userland/Libraries/LibC/fcntl.h
+++ b/Userland/Libraries/LibC/fcntl.h
@@ -29,6 +29,7 @@ int inode_watcher_add_watch(int fd, char const* path, size_t path_length, unsign
 int inode_watcher_remove_watch(int fd, int wd);
 
 int posix_fadvise(int fd, off_t offset, off_t len, int advice);
+int posix_fallocate(int fd, off_t offset, off_t len);
 
 int utimensat(int dirfd, char const* path, struct timespec const times[2], int flag);