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<?php
namespace Safe;
use Safe\Exceptions\PosixException;
/**
* posix_access checks the user's permission of a file.
*
* @param string $filename The name of the file to be tested.
* @param int $flags A mask consisting of one or more of POSIX_F_OK,
* POSIX_R_OK, POSIX_W_OK and
* POSIX_X_OK.
*
* POSIX_R_OK, POSIX_W_OK and
* POSIX_X_OK request checking whether the file
* exists and has read, write and execute permissions, respectively.
* POSIX_F_OK just requests checking for the
* existence of the file.
* @throws PosixException
*
*/
function posix_access(string $filename, int $flags = 0): void
{
error_clear_last();
$safeResult = \posix_access($filename, $flags);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* Gets information about a group provided its id.
*
* @param int $group_id The group id.
* @return array The array elements returned are:
*
* The group information array
*
*
*
* Element
* Description
*
*
*
*
* name
*
* The name element contains the name of the group. This is
* a short, usually less than 16 character "handle" of the
* group, not the real, full name.
*
*
*
* passwd
*
* The passwd element contains the group's password in an
* encrypted format. Often, for example on a system employing
* "shadow" passwords, an asterisk is returned instead.
*
*
*
* gid
*
* Group ID, should be the same as the
* group_id parameter used when calling the
* function, and hence redundant.
*
*
*
* members
*
* This consists of an array of
* string's for all the members in the group.
*
*
*
*
*
* The function returns FALSE on failure.
* @throws PosixException
*
*/
function posix_getgrgid(int $group_id): array
{
error_clear_last();
$safeResult = \posix_getgrgid($group_id);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
return $safeResult;
}
/**
* Gets information about a group provided its name.
*
* @param string $name The name of the group
* @return array Returns an array on success.
* The array elements returned are:
*
* The group information array
*
*
*
* Element
* Description
*
*
*
*
* name
*
* The name element contains the name of the group. This is
* a short, usually less than 16 character "handle" of the
* group, not the real, full name. This should be the same as
* the name parameter used when
* calling the function, and hence redundant.
*
*
*
* passwd
*
* The passwd element contains the group's password in an
* encrypted format. Often, for example on a system employing
* "shadow" passwords, an asterisk is returned instead.
*
*
*
* gid
*
* Group ID of the group in numeric form.
*
*
*
* members
*
* This consists of an array of
* string's for all the members in the group.
*
*
*
*
*
* @throws PosixException
*
*/
function posix_getgrnam(string $name): array
{
error_clear_last();
$safeResult = \posix_getgrnam($name);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
return $safeResult;
}
/**
* Gets the group set of the current process.
*
* @return array Returns an array of integers containing the numeric group ids of the group
* set of the current process.
* @throws PosixException
*
*/
function posix_getgroups(): array
{
error_clear_last();
$safeResult = \posix_getgroups();
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
return $safeResult;
}
/**
* Returns the login name of the user owning the current process.
*
* @return string Returns the login name of the user, as a string.
* @throws PosixException
*
*/
function posix_getlogin(): string
{
error_clear_last();
$safeResult = \posix_getlogin();
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
return $safeResult;
}
/**
* Returns an array of information about the user
* referenced by the given user ID.
*
* @param int $user_id The user identifier.
* @return array Returns an associative array with the following elements:
*
* The user information array
*
*
*
* Element
* Description
*
*
*
*
* name
*
* The name element contains the username of the user. This is
* a short, usually less than 16 character "handle" of the
* user, not the real, full name.
*
*
*
* passwd
*
* The passwd element contains the user's password in an
* encrypted format. Often, for example on a system employing
* "shadow" passwords, an asterisk is returned instead.
*
*
*
* uid
*
* User ID, should be the same as the
* user_id parameter used when calling the
* function, and hence redundant.
*
*
*
* gid
*
* The group ID of the user. Use the function
* posix_getgrgid to resolve the group
* name and a list of its members.
*
*
*
* gecos
*
* GECOS is an obsolete term that refers to the finger
* information field on a Honeywell batch processing system.
* The field, however, lives on, and its contents have been
* formalized by POSIX. The field contains a comma separated
* list containing the user's full name, office phone, office
* number, and home phone number. On most systems, only the
* user's full name is available.
*
*
*
* dir
*
* This element contains the absolute path to the
* home directory of the user.
*
*
*
* shell
*
* The shell element contains the absolute path to the
* executable of the user's default shell.
*
*
*
*
*
* The function returns FALSE on failure.
* @throws PosixException
*
*/
function posix_getpwuid(int $user_id): array
{
error_clear_last();
$safeResult = \posix_getpwuid($user_id);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
return $safeResult;
}
/**
* posix_getrlimit returns an array
* of information about the current resource's soft and hard limits.
*
*
* Each resource has an associated soft and hard limit. The soft
* limit is the value that the kernel enforces for the corresponding
* resource. The hard limit acts as a ceiling for the soft limit.
* An unprivileged process may only set its soft limit to a value
* from 0 to the hard limit, and irreversibly lower its hard limit.
*
* @return array Returns an associative array of elements for each
* limit that is defined. Each limit has a soft and a hard limit.
*
* List of possible limits returned
*
*
*
* Limit name
* Limit description
*
*
*
*
* core
*
* The maximum size of the core file. When 0, not core files are
* created. When core files are larger than this size, they will
* be truncated at this size.
*
*
*
* totalmem
*
* The maximum size of the memory of the process, in bytes.
*
*
*
* virtualmem
*
* The maximum size of the virtual memory for the process, in bytes.
*
*
*
* data
*
* The maximum size of the data segment for the process, in bytes.
*
*
*
* stack
*
* The maximum size of the process stack, in bytes.
*
*
*
* rss
*
* The maximum number of virtual pages resident in RAM
*
*
*
* maxproc
*
* The maximum number of processes that can be created for the
* real user ID of the calling process.
*
*
*
* memlock
*
* The maximum number of bytes of memory that may be locked into RAM.
*
*
*
* cpu
*
* The amount of time the process is allowed to use the CPU.
*
*
*
* filesize
*
* The maximum size of the data segment for the process, in bytes.
*
*
*
* openfiles
*
* One more than the maximum number of open file descriptors.
*
*
*
*
*
* The function returns FALSE on failure.
* @throws PosixException
*
*/
function posix_getrlimit(): array
{
error_clear_last();
$safeResult = \posix_getrlimit();
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
return $safeResult;
}
/**
* Return the session id of the process process_id.
* The session id of a process is the process group id of the session leader.
*
* @param int $process_id The process identifier. If set to 0, the current process is
* assumed. If an invalid process_id is
* specified, then FALSE is returned and an error is set which
* can be checked with posix_get_last_error.
* @return int Returns the identifier, as an int.
* @throws PosixException
*
*/
function posix_getsid(int $process_id): int
{
error_clear_last();
$safeResult = \posix_getsid($process_id);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
return $safeResult;
}
/**
* Calculates the group access list for the user specified in name.
*
* @param string $username The user to calculate the list for.
* @param int $group_id Typically the group number from the password file.
* @throws PosixException
*
*/
function posix_initgroups(string $username, int $group_id): void
{
error_clear_last();
$safeResult = \posix_initgroups($username, $group_id);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* Send the signal signal to the process with
* the process identifier process_id.
*
* @param int $process_id The process identifier.
* @param int $signal One of the PCNTL signals constants.
* @throws PosixException
*
*/
function posix_kill(int $process_id, int $signal): void
{
error_clear_last();
$safeResult = \posix_kill($process_id, $signal);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* posix_mkfifo creates a special
* FIFO file which exists in the file system and acts as
* a bidirectional communication endpoint for processes.
*
* @param string $filename Path to the FIFO file.
* @param int $permissions The second parameter permissions has to be given in
* octal notation (e.g. 0644). The permission of the newly created
* FIFO also depends on the setting of the current
* umask. The permissions of the created file are
* (mode & ~umask).
* @throws PosixException
*
*/
function posix_mkfifo(string $filename, int $permissions): void
{
error_clear_last();
$safeResult = \posix_mkfifo($filename, $permissions);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* Creates a special or ordinary file.
*
* @param string $filename The file to create
* @param int $flags This parameter is constructed by a bitwise OR between file type (one of
* the following constants: POSIX_S_IFREG,
* POSIX_S_IFCHR, POSIX_S_IFBLK,
* POSIX_S_IFIFO or
* POSIX_S_IFSOCK) and permissions.
* @param int $major The major device kernel identifier (required to pass when using
* S_IFCHR or S_IFBLK).
* @param int $minor The minor device kernel identifier.
* @throws PosixException
*
*/
function posix_mknod(string $filename, int $flags, int $major = 0, int $minor = 0): void
{
error_clear_last();
$safeResult = \posix_mknod($filename, $flags, $major, $minor);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* Set the effective group ID of the current process. This is a
* privileged function and needs appropriate privileges (usually
* root) on the system to be able to perform this function.
*
* @param int $group_id The group id.
* @throws PosixException
*
*/
function posix_setegid(int $group_id): void
{
error_clear_last();
$safeResult = \posix_setegid($group_id);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* Set the effective user ID of the current process. This is a privileged
* function and needs appropriate privileges (usually root) on
* the system to be able to perform this function.
*
* @param int $user_id The user id.
* @throws PosixException
*
*/
function posix_seteuid(int $user_id): void
{
error_clear_last();
$safeResult = \posix_seteuid($user_id);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* Set the real group ID of the current process. This is a
* privileged function and needs appropriate privileges (usually
* root) on the system to be able to perform this function. The
* appropriate order of function calls is
* posix_setgid first,
* posix_setuid last.
*
* @param int $group_id The group id.
* @throws PosixException
*
*/
function posix_setgid(int $group_id): void
{
error_clear_last();
$safeResult = \posix_setgid($group_id);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* Let the process process_id join the process group
* process_group_id.
*
* @param int $process_id The process id.
* @param int $process_group_id The process group id.
* @throws PosixException
*
*/
function posix_setpgid(int $process_id, int $process_group_id): void
{
error_clear_last();
$safeResult = \posix_setpgid($process_id, $process_group_id);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* posix_setrlimit sets the soft and hard limits for a
* given system resource.
*
*
* Each resource has an associated soft and hard limit. The soft
* limit is the value that the kernel enforces for the corresponding
* resource. The hard limit acts as a ceiling for the soft limit.
* An unprivileged process may only set its soft limit to a value
* from 0 to the hard limit, and irreversibly lower its hard limit.
*
* @param int $resource The
* resource limit constant
* corresponding to the limit that is being set.
* @param int $soft_limit The soft limit, in whatever unit the resource limit requires, or
* POSIX_RLIMIT_INFINITY.
* @param int $hard_limit The hard limit, in whatever unit the resource limit requires, or
* POSIX_RLIMIT_INFINITY.
* @throws PosixException
*
*/
function posix_setrlimit(int $resource, int $soft_limit, int $hard_limit): void
{
error_clear_last();
$safeResult = \posix_setrlimit($resource, $soft_limit, $hard_limit);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* Set the real user ID of the current process. This is a privileged
* function that needs appropriate privileges (usually root) on
* the system to be able to perform this function.
*
* @param int $user_id The user id.
* @throws PosixException
*
*/
function posix_setuid(int $user_id): void
{
error_clear_last();
$safeResult = \posix_setuid($user_id);
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
}
/**
* Gets information about the current CPU usage.
*
* @return array Returns a hash of strings with information about the current
* process CPU usage. The indices of the hash are:
*
*
*
* ticks - the number of clock ticks that have elapsed since
* reboot.
*
*
*
*
* utime - user time used by the current process.
*
*
*
*
* stime - system time used by the current process.
*
*
*
*
* cutime - user time used by current process and children.
*
*
*
*
* cstime - system time used by current process and children.
*
*
*
* The function returns FALSE on failure.
* @throws PosixException
*
*/
function posix_times(): array
{
error_clear_last();
$safeResult = \posix_times();
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
return $safeResult;
}
/**
* Gets information about the system.
*
* Posix requires that assumptions must not be made about the
* format of the values, e.g. the assumption that a release may contain
* three digits or anything else returned by this function.
*
* @return array Returns a hash of strings with information about the
* system. The indices of the hash are
*
*
* sysname - operating system name (e.g. Linux)
*
*
* nodename - system name (e.g. valiant)
*
*
* release - operating system release (e.g. 2.2.10)
*
*
* version - operating system version (e.g. #4 Tue Jul 20
* 17:01:36 MEST 1999)
*
*
* machine - system architecture (e.g. i586)
*
*
* domainname - DNS domainname (e.g. example.com)
*
*
*
* domainname is a GNU extension and not part of POSIX.1, so this
* field is only available on GNU systems or when using the GNU
* libc.
*
* The function returns FALSE on failure.
* @throws PosixException
*
*/
function posix_uname(): array
{
error_clear_last();
$safeResult = \posix_uname();
if ($safeResult === false) {
throw PosixException::createFromPhpError();
}
return $safeResult;
}