fchownat on score

change ownership of a file

sys_fchownat(int dfd, const char *filename, uid_t user, gid_t group, int flag)
number54 (0x36)
abicommon
entry pointsys_fchownat
sinceLinux 3.7 or earlier (3.7 is the first release scanned for score)
man pagefchownat(2)
sourceelixir.bootlin.com

Registers

registervalue
r2754, the syscall number
r4int dfd
r5const char *filename
r6uid_t user
r7gid_t group
r8int flag
r4the return value

Then run syscall to enter the kernel.

r7 is the error flag and r4 then holds the positive error number.

This architecture was removed from the Linux kernel in Linux 4.17. The newest release with a syscall table here is Linux 4.16. The other removed architectures live on the historical architectures page.

Same syscall on other architectures

Get this as JSON: https://api.syscall.sh/v2/syscalls/score/fchownat?kernel=all