POSIX Functions

posix_access — Determine accessibility of a file
posix_ctermid — Get path name of controlling terminal
posix_errno — Alias of posix_get_last_error
posix_get_last_error — Retrieve the error number set by the last posix function that failed
posix_getcwd — Pathname of current directory
posix_getegid — Return the effective group ID of the current process
posix_geteuid — Return the effective user ID of the current process
posix_getgid — Return the real group ID of the current process
posix_getgrgid — Return info about a group by group id
posix_getgrnam — Return info about a group by name
posix_getgroups — Return the group set of the current process
posix_getlogin — Return login name
posix_getpgid — Get process group id for job control
posix_getpgrp — Return the current process group identifier
posix_getpid — Return the current process identifier
posix_getppid — Return the parent process identifier
posix_getpwnam — Return info about a user by username
posix_getpwuid — Return info about a user by user id
posix_getrlimit — Return info about system resource limits
posix_getsid — Get the current sid of the process
posix_getuid — Return the real user ID of the current process
posix_initgroups — Calculate the group access list
posix_isatty — Determine if a file descriptor is an interactive terminal
posix_kill — Send a signal to a process
posix_mkfifo — Create a fifo special file (a named pipe)
posix_mknod — Create a special or ordinary file (POSIX.1)
posix_setegid — Set the effective GID of the current process
posix_seteuid — Set the effective UID of the current process
posix_setgid — Set the GID of the current process
posix_setpgid — Set process group id for job control
posix_setrlimit — Set system resource limits
posix_setsid — Make the current process a session leader
posix_setuid — Set the UID of the current process
posix_strerror — Retrieve the system error message associated with the given errno
posix_times — Get process times
posix_ttyname — Determine terminal device name
posix_uname — Get system name

User Contributed Notes

8 years ago


That is not part of POSIX, those are only present as you listed on linux systems - some other systems have a /proc with different things in it (sometimes stuff that's symbolic links on linux will be hardlinks, textfiles on linux will be binary, or different files with different information) or none at all

roberto at spadim dot com dot br

9 years ago


don't forget that in posix systems you can use /proc/$process_id/
files:
auxv
cmdline
cwd
environ
exe
fd
maps
mem
mounts
root 
stat  
statm  
status  
task  
wchan

with it you can make somethings like:

$PPID=getmypid();
$pid=pcntl_fork();
if ($pid==0){
while(1){
if (strpos(file_get_contents("/proc/$PPID/cmdline"),'php')===false) echo "parent pid die";
}

}else{
// forked
}

with this you can use some libs that block signal or some bad signal handling or zombies process or anything you can think :)

POSIX Functions

See Also

Table of Contents

User Contributed Notes