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Predefined Constants
The following list of signals are supported by the Process Control
functions. Please see your systems signal(7) man page for details
of the default behavior of these signals.
Process Control constants
-
WNOHANG
(int)
-
-
WUNTRACED
(int)
-
-
WCONTINUED
(int)
-
-
WEXITED
(int)
-
-
WSTOPPED
(int)
-
-
WNOWAIT
(int)
-
SIG_* constants
-
SIG_IGN
(int)
-
-
SIG_DFL
(int)
-
-
SIG_ERR
(int)
-
-
SIGHUP
(int)
-
-
SIGINFO
(int)
-
-
SIGINT
(int)
-
-
SIGQUIT
(int)
-
-
SIGILL
(int)
-
-
SIGTRAP
(int)
-
-
SIGABRT
(int)
-
-
SIGIOT
(int)
-
-
SIGBUS
(int)
-
-
SIGFPE
(int)
-
-
SIGKILL
(int)
-
-
SIGUSR1
(int)
-
-
SIGSEGV
(int)
-
-
SIGUSR2
(int)
-
-
SIGPIPE
(int)
-
-
SIGALRM
(int)
-
-
SIGTERM
(int)
-
-
SIGSTKFLT
(int)
-
-
SIGCLD
(int)
-
-
SIGCHLD
(int)
-
-
SIGCONT
(int)
-
-
SIGSTOP
(int)
-
-
SIGTSTP
(int)
-
-
SIGTTIN
(int)
-
-
SIGTTOU
(int)
-
-
SIGURG
(int)
-
-
SIGXCPU
(int)
-
-
SIGXFSZ
(int)
-
-
SIGVTALRM
(int)
-
-
SIGPROF
(int)
-
-
SIGWINCH
(int)
-
-
SIGPOLL
(int)
-
-
SIGIO
(int)
-
-
SIGPWR
(int)
-
-
SIGSYS
(int)
-
-
SIGBABY
(int)
-
-
SIGRTMIN
(int)
-
-
SIGRTMAX
(int)
-
-
SIG_BLOCK
(int)
-
-
SIG_UNBLOCK
(int)
-
-
SIG_SETMASK
(int)
-
SI_* constants
-
SI_USER
(int)
-
-
SI_NOINFO
(int)
-
-
SI_KERNEL
(int)
-
-
SI_QUEUE
(int)
-
-
SI_TIMER
(int)
-
-
SI_MSGGQ
(int)
-
-
SI_ASYNCIO
(int)
-
-
SI_SIGIO
(int)
-
-
SI_TKILL
(int)
-
-
SI_MESGQ
(int)
-
CLD_* constants
-
CLD_EXITED
(int)
-
-
CLD_KILLED
(int)
-
-
CLD_DUMPED
(int)
-
-
CLD_TRAPPED
(int)
-
-
CLD_STOPPED
(int)
-
-
CLD_CONTINUED
(int)
-
TRAP_* constants
-
TRAP_BRKPT
(int)
-
-
TRAP_TRACE
(int)
-
POLL_* constants
-
POLL_IN
(int)
-
-
POLL_OUT
(int)
-
-
POLL_MSG
(int)
-
-
POLL_ERR
(int)
-
-
POLL_PRI
(int)
-
-
POLL_HUP
(int)
-
ILL_* constants
-
ILL_ILLOPC
(int)
-
-
ILL_ILLOPN
(int)
-
-
ILL_ILLADR
(int)
-
-
ILL_ILLTRP
(int)
-
-
ILL_PRVOPC
(int)
-
-
ILL_PRVREG
(int)
-
-
ILL_COPROC
(int)
-
-
ILL_BADSTK
(int)
-
FPE_* constants
-
FPE_INTDIV
(int)
-
-
FPE_INTOVF
(int)
-
-
FPE_FLTDIV
(int)
-
-
FPE_FLTOVF
(int)
-
-
FPE_FLTUND
(int)
-
-
FPE_FLTRES
(int)
-
-
FPE_FLTINV
(int)
-
-
FPE_FLTSUB
(int)
-
SEGV_* constants
-
SEGV_MAPERR
(int)
-
-
SEGV_ACCERR
(int)
-
BUS_* constants
-
BUS_ADRALN
(int)
-
-
BUS_ADRERR
(int)
-
-
BUS_OBJERR
(int)
-
CLONE_* constants
-
CLONE_NEWNS
(int)
-
Available as of PHP 7.4.0
-
CLONE_NEWIPC
(int)
-
Available as of PHP 7.4.0
-
CLONE_NEWUTS
(int)
-
Available as of PHP 7.4.0
-
CLONE_NEWNET
(int)
-
Available as of PHP 7.4.0
-
CLONE_NEWPID
(int)
-
Available as of PHP 7.4.0
-
CLONE_NEWUSER
(int)
-
Available as of PHP 7.4.0
-
CLONE_NEWCGROUP
(int)
-
Available as of PHP 7.4.0
PRIO_* constants
-
PRIO_PGRP
(int)
-
-
PRIO_USER
(int)
-
-
PRIO_PROCESS
(int)
-
-
PRIO_DARWIN_BG
(int)
-
Available as of PHP 8.1.0.
-
PRIO_DARWIN_THREAD
(int)
-
Available as of PHP 8.1.0.
Process Control error constants
-
PCNTL_E2BIG
(int)
-
Argument list too long
-
PCNTL_EACCES
(int)
-
Permission denied
-
PCNTL_EAGAIN
(int)
-
Resource temporarily unavailable
-
PCNTL_ECAPMODE
(int)
-
The process attempted an operation not permitted in capability mode
while running in capability mode.
-
PCNTL_ECHILD
(int)
-
No child processes
-
PCNTL_EFAULT
(int)
-
Bad address
-
PCNTL_EINTR
(int)
-
Interrupted function call
-
PCNTL_EINVAL
(int)
-
Invalid argument
-
PCNTL_EIO
(int)
-
Input/output error
-
PCNTL_EISDIR
(int)
-
Is a directory
-
PCNTL_ELIBBAD
(int)
-
Accessing a corrupted shared library.
-
PCNTL_ELOOP
(int)
-
Too many levels of symbolic links
-
PCNTL_EMFILE
(int)
-
Too many open files. Commonly caused by exceeding
the
RLIMIT_NOFILE resource limit.
Can also be caused by exceeding the limit specified in
/proc/sys/fs/nr_open.
-
PCNTL_ENAMETOOLONG
(int)
-
Filename too long
-
PCNTL_ENFILE
(int)
-
Too many open files in system.
On Linux, this is probably a result of encountering
the /proc/sys/fs/file-max limit.
-
PCNTL_ENOENT
(int)
-
No such file or directory.
Typically, this error results when a specified pathname
does not exist, or one of the components in the directory
prefix of a pathname does not exist, or the specified
pathname is a dangling symbolic link.
-
PCNTL_ENOEXEC
(int)
-
Exec format error
-
PCNTL_ENOMEM
(int)
-
Not enough space/cannot allocate memory
-
PCNTL_ENOSPC
(int)
-
No space left on device
-
PCNTL_ENOTDIR
(int)
-
Not a directory
-
PCNTL_EPERM
(int)
-
Operation not permitted
-
PCNTL_ESRCH
(int)
-
No such process
-
PCNTL_ETXTBSY
(int)
-
Text file busy
-
PCNTL_EUSERS
(int)
-
Too many users
FORK_* constants
-
FORK_NOSIGCHLD
(int)
-
-
FORK_WAITPID
(int)
-
RF* constants
-
RFCFDG
(int)
-
-
RFFDG
(int)
-
-
RFLINUXTHPN
(int)
-
-
RFNOWAIT
(int)
-
-
RFPROC
(int)
-
-
RFTHREAD
(int)
-
-
RFTSIGZMB
(int)
-
First argument to waitid (idtype )
-
P_ALL
(int)
-
Select any children.
-
P_PID
(int)
-
Select by process ID.
-
P_PGID
(int)
-
Select by process group ID.
-
P_PIDFD
(int)
-
Select by PID file descriptor.
Specific to Linux (since Linux 5.4).
-
P_UID
(int)
-
Select by effective user ID.
Specific to NetBSD and FreeBSD.
-
P_GID
(int)
-
Select by effective group ID.
Specific to NetBSD and FreeBSD.
-
P_SID
(int)
-
Select by session ID.
Specific to NetBSD and FreeBSD.
-
P_JAILID
(int)
-
Select by jail identifier.
Specific to FreeBSD.
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