List of Files and Directories Subroutines

General Programming Concepts: Writing and Debugging Programs

List of Files and Directories Subroutines

The system provides subroutines for:

Controlling Files

access, accessx, or faccessx	Determine accessibility of a file
fclear	Clears space in a file
fcntl, dup, or dup2	Control open file descriptors
fsync	Writes changes in a file to permanent storage
getenv	Returns the value of an environment variable
getutent, getutid, getutline, putuline, setutent, endutent, or utmpname
	Access utmp file entries
getutid_r, getutline_r, pututline_r, setutent_r, endutent_r, or utmpname_r
	Access utmp file entries
lseek or llseek	Move the read-write pointer in an open file
lockfx, lockf, or flock	Controls open file descriptor locks
mknod or mkfifo	Create regular, FIFO, or special files
mktemp or mkstemp	Construct a unique file name
open, openx, or creat	Return a file descriptor and creates files
pclose	Closes an open pipe
pipe	Creates an interprocess channel
popen	Initiates a pipe to a process
pathconf, fpathconf	Retrieve file implementation characteristics
putenv	Sets an environment variable
read, readx, readv, readvx	Read from a file or device
rename	Renames directory or file within a file system
statx, stat, fstatx, fstat, fullstat, fullstat
	Get file status
tmpfile	Creates a temporary file
tmpnam or tempnam	Construct a name for a temporary file
truncate, ftruncate	Make a file shorter
umask	Gets and sets the value of the file creation mask
utimes or utime	Set file access or modification time
write, writex, writev, writevx	Write to a file or device

Working with Directories

chdir	Changes the current working directory
chroot	Changes the effective root directory
getwd, getcwd	Get the current directory path name
glob	Generates a list of path names to accessible files
globfree	Frees all memory associated with the pglob parameter
link	Creates additional directory entry for an existing file
mkdir	Creates a directory
opendir, readdir, telldir, seekdir, rewinddir, closedir
	Performs operations on directories
readdir_r	Reads a directory
rmdir	Removes a directory
scandir, alphasort	Scan a directory
readlink	Reads the volume of a symbolic link
remove	Makes a file inaccessible by specified name
symlink	Creates a symbolic link to a file
unlink	Removes a directory entry

Manipulating File Systems

confstr	Determines the current value of a specified system variable defined by a string
fscntl	Manipulates file system control operations
getfsent, getfsspec, getfsfile, getfstype, setfsent, or endfsent
	Get information about a file system
getfsent_r, getfsspec_r, getfsfile_r, getfstype_r, setfsent_r, or endfsent_r
	Get information about a file system
getvfsent, getvfsbytype, getvfsbyname, getvfsbyflag, setvfsent, endvfsent
	Get information about virtual file system entries
mnctl	Returns mount status information
quotactl	Manipulates disk quotas
statfs, fstatfs	Get the status of a file's file system
sysconf	Reports current value of system limits or options
sync	Updates all file systems information to disk
umask	Gets and sets the value of the file creation mask
vmount	Mounts a file system
umount, uvmount	Remove a virtual file system from the file tree

Related Information

Files, Directories, and File Systems for Programmers

Subroutines Overview

Header Files Overview