POSIX* Library Procedures Summary

Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

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Date 3/22/2024

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POSIX* Library Procedures Summary

The following table lists library procedures for POSIX*.

Programs that use POSIX procedures must access the appropriate libraries with USE IFPOSIX. The IPX nnnn routines are functions; the PXF nnnn routines are subroutines, except for the routines named PXFIS nnnn and PXFWIF nnnn.

Name	Description
IPXFARGC	Returns the index of the last command-line argument.
IPXFCONST	Returns the value associated with a constant defined in the C POSIX standard.
IPXFLENTRIM	Returns the index of the last non-blank character in an input string.
IPXFWEXITSTATUS ^¹	Returns the exit code of a child process.
IPXFWSTOPSIG ^¹	Returns the number of the signal that caused a child process to stop.
IPXFWTERMSIG ^¹	Returns the number of the signal that caused a child process to terminate.
PXF(type)GET	Gets the value stored in a component (or field) of a structure.
PXF(type)SET	Sets the value of a component (or field) of a structure.
PXFA(type)GET	Gets the array values stored in a component (or field) of a structure.
PXFA(type)SET	Sets the value of an array component (or field) of a structure.
PXFACCESS	Determines the accessibility of a file.
PXFALARM	Schedules an alarm.
PXFCALLSUBHANDLE	Calls the associated subroutine.
PXFCFGETISPEED ^¹	Returns the input baud rate from a `termios` structure.
PXFCFGETOSPEED ^¹	Returns the output baud rate from a `termios` structure.
PXFCFSETISPEED ^¹	Sets the input baud rate in a `termios` structure.
PXFCFSETOSPEED ^¹	Sets the output baud rate in a `termios` structure.
PXFCHDIR	Changes the current working directory.
PXFCHMOD	Changes the ownership mode of the file.
PXFCHOWN ^¹	Changes the owner and group of a file.
PXFCLEARENV	Clears the process environment.
PXFCLOSE	Closes the file associated with the descriptor.
PXFCLOSEDIR	Closes the directory stream.
PXFCNTL ^¹	Manipulates an open file descriptor.
PXFCONST	Returns the value associated with a constant.
PXFCREAT	Creates a new file or rewrites an existing file.
PXFCTERMID ^¹	Generates a terminal pathname.
PXFDUP, PXFDUP2	Duplicates an existing file descriptor.
PXFE(type)GET	Gets the value stored in an array element component (or field) of a structure.
PXFE(type)SET	Sets the value of an array element component (or field) of a structure.
PXFEXECV, PXFEXECVE, PXFEXECVP	Executes a new process by passing command-line arguments.
PXFEXIT, PXFFASTEXIT	Exits from a process.
PXFFDOPEN	Opens an external unit.
PXFFFLUSH	Flushes a file directly to disk.
PXFFGETC	Reads a character from a file.
PXFFILENO	Returns the file descriptor associated with a specified unit.
PXFFORK ^¹	Creates a child process that differs from the parent process only in its PID.
PXFFPATHCONF	Gets the value for a configuration option of an opened file.
PXFFPUTC	Writes a character to a file.
PXFFSEEK	Modifies a file position.
PXFFSTAT	Gets a file's status information.
PXFFTELL	Returns the relative position in bytes from the beginning of the file.
PXFGETARG	Gets the specified command-line argument.
PXFGETC	Reads a character from standard input unit 5.
PXFGETCWD	Returns the path of the current working directory.
PXFGETEGID ^¹	Gets the effective group ID of the current process.
PXFGETENV	Gets the setting of an environment variable.
PXFGETEUID ^¹	Gets the effective user ID of the current process.
PXFGETGID ^¹	Gets the real group ID of the current process.
PXFGETGRGID ^¹	Gets group information for the specified GID.
PXFGETGRNAM ^¹	Gets group information for the named group.
PXFGETGROUPS ^¹	Gets supplementary group IDs.
PXFGETLOGIN	Gets the name of the user.
PXFGETPGRP ^¹	Gets the process group ID of the calling process.
PXFGETPID	Gets the process ID of the calling process.
PXFGETPPID	Gets the process ID of the parent of the calling process.
PXFGETPWNAM ^¹	Gets password information for a specified name.
PXFGETPWUID ^¹	Gets password information for a specified UID.
PXFGETSUBHANDLE	Returns a subroutine handle for a subroutine.
PXFGETUID ^¹	Gets the real user ID of the current process.
PXFISATTY ^¹	Tests whether a file descriptor is connected to a terminal.
PXFISBLK	Tests for a block special file.
PXFISCHR	Tests for a character file.
PXFISCONST	Tests whether a string is a valid constant name.
PXFISDIR	Tests whether a file is a directory.
PXFISFIFO	Tests whether a file is a special FIFO file.
PXFISREG	Tests whether a file is a regular file.
PXFKILL	Sends a signal to a specified process.
PXFLINK ^¹	Creates a link to a file or directory.
PXFLOCALTIME	Converts a given elapsed time in seconds to local time.
PXFLSEEK	Positions a file a specified distance in bytes.
PXFMKDIR	Creates a new directory.
PXFMKFIFO ^¹	Creates a new FIFO.
PXFOPEN	Opens or creates a file.
PXFOPENDIR	Opens a directory and associates a stream with it.
PXFPATHCONF	Gets the value for a configuration option of an opened file.
PXFPAUSE	Suspends process execution.
PXFPIPE ^¹	Creates a communications pipe between two processes.
PXFPOSIXIO ^¹	Sets the current value of the POSIX I/O flag.
PXFPUTC	Outputs a character to logical unit 6 (stdout).
PXFREAD	Reads from a file.
PXFREADDIR	Reads the current directory entry.
PXFRENAME	Changes the name of a file.
PXFREWINDDIR	Resets the position of the stream to the beginning of the directory.
PXFRMDIR	Removes a directory.
PXFSETENV	Adds a new environment variable or sets the value of an environment variable.
PXFSETGID ^¹	Sets the effective group ID of the current process.
PXFSETPGID ^¹	Sets the process group ID.
PXFSETSID ^¹	Creates a session and sets the process group ID.
PXFSETUID ^¹	Sets the effective user ID of the current process.
PXFSIGACTION ^¹	Changes the action associated with a specific signal.
PXFSIGADDSET ^¹	Adds a signal to a signal set.
PXFSIGDELSET ^¹	Deletes a signal from a signal set.
PXFSIGEMPTYSET ^¹	Empties a signal set.
PXFSIGFILLSET ^¹	Fills a signal set.
PXFSIGISMEMBER	Tests whether a signal is a member of a signal set.
PXFSIGPENDING ^¹	Examines pending signals.
PXFSIGPROCMASK ^¹	Changes the list of currently blocked signals.
PXFSIGSUSPEND ^¹	Suspends the process until a signal is received.
PXFSLEEP	Forces the process to sleep.
PXFSTAT	Gets a file's status information.
PXFSTRUCTCOPY	Copies the contents of one structure to another.
PXFSTRUCTCREATE	Creates an instance of the specified structure.
PXFSTRUCTFREE	Deletes the instance of a structure.
PXFSYSCONF	Gets values for system limits or options.
PXFTCDRAIN ^¹	Waits until all output written has been transmitted.
PXFTCFLOW ^¹	Suspends the transmission or reception of data.
PXFTCFLUSH ^¹	Discards terminal input data, output data, or both.
PXFTCGETATTR ^¹	Reads current terminal settings.
PXFTCGETPGRP ^¹	Gets the foreground process group ID associated with the terminal.
PXFTCSENDBREAK ^¹	Sends a break to the terminal.
PXFTCSETATTR ^¹	Writes new terminal settings.
PXFTCSETPGRP ^¹	Sets the foreground process group associated with the terminal.
PXFTIME	Gets the system time.
PXFTIMES	Gets process times.
PXFTTYNAM ^¹	Gets the terminal pathname.
PXFUCOMPARE	Compares two unsigned integers.
PXFUMASK	Sets a new file creation mask and gets the previous one.
PXFUNAME	Gets the operation system name.
PXFUNLINK	Removes a directory entry.
PXFUTIME	Sets file access and modification times.
PXFWAIT ^¹	Waits for a child process.
PXFWAITPID ^¹	Waits for a specific PID.
PXFWIFEXITED ^¹	Determines if a child process has exited.
PXFWIFSIGNALED ^¹	Determines if a child process has exited because of a signal.
PXFWIFSTOPPED ^¹	Determines if a child process has stopped.
PXFWRITE	Writes to a file.
¹ This routine is only available for Linux.

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POSIX* Library Procedures Summary