syscall.sh / x64 / fchmod
fchmod
change permissions of a file
sys_fchmod(unsigned int fd, umode_t mode)| number | 91 (0x5b) |
|---|---|
| abi | common |
| entry point | sys_fchmod |
| since | Linux 3.3 |
| man page | fchmod(2) |
| source | elixir.bootlin.com |
Registers
| register | value |
|---|---|
rax | 91, the syscall number |
rdi | unsigned int fd |
rsi | umode_t mode |
rax | the return value |
Then run syscall to enter the kernel.
Same syscall on other architectures
- x86 94
- arm64 52
- arm 94
- riscv64 52
- x32 1073741915
- loongarch64 52
- ppc64 94
- ppc 94
- s390x 94
- mips64 5089
- mipsn32 6089
- mipso32 4094
- alpha 124
- arc 52
- csky 52
- hexagon 52
- m68k 94
- microblaze 94
- nios2 52
- openrisc 52
- parisc 94
- sh 94
- sparc 124
- sparc64 124
- xtensa 52
Get this as JSON: https://api.syscall.sh/v2/syscalls/x64/fchmod