Linux System Call Quick Reference (Page 2 of 3) in pdf

enable or disable process accounting

kernel/acct.c

unmap pages of memory

mm/mmap.c

acct

munmap

unmount a file system

fs/super.c

set a file to a specified length

fs/open.c

umount2

truncate

control device

fs/ioctl.c

set a file to a specified length

fs/open.c

ioctl

ftruncate

file control

fs/fcntl.c

change access permission mode of file

fs/open.c

fcntl

fchmod

(unimplemented)

change owner and group of a file

fs/open.c

mpx

fchown

set process group ID

kernel/sys.c

get program scheduling priority

kernel/sys.c

setpgid

getpriority

(unimplemented)

set program scheduling priority

kernel/sys.c

ulimit

setpriority

obsolete uname system call

arch/i386/kernel/sys_i386.c

execut ion time profile

olduname

profil

set file creation mask

kernel/sys.c

get file system statistics

fs/open.c

umask

statfs

change root directory

fs/open.c

get file system statistics

fs/open.c

chroot

100

fstatfs

get file system statistics

fs/super.c

set port input/output permissions

arch/i386/kernel/ioport.c

ustat

101

ioperm

dup2

duplicate a file descriptor

fs/fcntl.c

102

socketcall

socket system calls

net/so cket.c

get parent process ID

kernel/sched.c

read and/or clear kernel message ring buffer

kernel/printk.c

getppid

103

syslog

get the process group ID

kernel/sys.c

set value of interval timer

kernel/itimer.c

getpgrp

104

setitimer

creates a session and sets the process group ID

kernel/sys.c

get value of interval timer

kernel/itimer.c

setsid

105

getitimer

POSIX signal handling functions

arch/i386/kernel/signal.c

get file status

fs/stat.c

sigaction

106

sys_newstat

ANSI C signal handling

kernel/signal.c

get file status

fs/stat.c

sgetmask

107

sys_newlstat

ANSI C signal handling

kernel/signal.c

get file status

fs/stat.c

ssetmask

108

sys_newfstat

set real and effective user IDs

kernel/sys.c

get name and information about current kernel

arch/i386/kernel/sys_i386.c

setreuid

109

olduname

set real and effective group IDs

kernel/sys.c

change I/O privilege level

arch/i386/kernel/ioport.c

setregid

110

iopl

install a signal mask and suspend caller until

arch/i386/kernel/signal.c

virtually hangup the current tty

fs/open.c

111

vhangup

sigsuspend

signal

make process 0 idle

arch/i386/kernel/process.c

112

idle

examine signals that are blocked and pending

kernel/signal.c

sigpending

enter virtual 8086 mode

arch/i386/kernel/vm86.c

113

vm86old

set hostname

kernel/sys.c

sethostname

wait for process termination, BSD style

kernel/exit.c

114

wait4

set maximum system resource con sumption

kernel/sys.c

setrlimit

stop swapping to file/device

mm/swapfile.c

115

swapoff

get maximum system resource con sumption

kernel/sys.c

getrlimit

116

sysinfo

returns information on overall system statistics

kernel/info.c

get maximum system resource con sumption

kernel/sys.c

getrusage

System V IPC system calls

arch/i386/kernel/sys_i386.c

117

ipc

get the date and time

kernel/time.c

gettimeofday

synchronize a file's complete in-core state with that

fs/buffer.c

118

fsync

set the date and time

kernel/time.c

on disk

settimeofday

get list of supplementary group IDs

kernel/sys.c

return from signal handler and cleanup stack

arch/i386/kernel/signal.c

getgroups

119

sigreturn

frame

set list of supplementary group IDs

kernel/sys.c

setgroups

create a child process

arch/i386/kernel/process.c

120

clone

sync. I/O multiplexing

arch/i386/kernel/sys_i386.c

old_select

set domain name

kernel/sys.c

121

setdomainname

make a symbolic link to a file

fs/namei.c

symlink

get name and information about current kernel

kernel/sys.c

122

uname

lstat

get file status

fs/stat.c

get or set ldt

arch/i386/kernel/ldt.c

123

modify_ldt

read the contents of a symbolic link

fs/stat.c

readlink

tune kernel clock

kernel/time.c

124

adjtimex

select shared library

fs/exec.c

uselib

set protection of memory mapping

mm/mprotect.c

125

mprotect

start swapping to file/device

mm/swapfile.c

swapon

POSIX signal handling functions

kernel/signal.c

126

sigprocmask

reboot or enable/disable Ctrl-Alt -Del

kernel/sys.c

reboot

create a loadable module entry

kernel/module.c

127

create_module

read directory entry

fs/readdir.c

old_readdir

initialize a loadable module entry

kernel/module.c

128

init_module

map pages of memory

arch/i386/kernel/sys_i386.c

old_mmap

delete a loadable module entry

kernel/module.c

129

delete_module

Linux System Call Quick Reference Page 2

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