System calls and libraries

General purpose library (libgen)

libgen contains general purpose functions, and functions designed to facilitate internationalization. These are described on the Section S manual pages. ``libgen functions'' describes functions in libgen. The header files <libgen.h> and, occasionally, <regexp.h> should be included in programs that use these functions.

libgen functions

advance step Execute a regular expression on a string.

basename Return a pointer to the last element of a path name.

bgets Read a specified number of characters into a buffer from a stream until a specified character is reached.

bufsplit Split the buffer into fields delimited by tabs and new-lines.

compile Return a pointer to a compiled regular expression that uses the same syntax as ed.

copylist Copy a file into a block of memory, replacing new-lines with null characters. It returns a pointer to the copy.

dirname Return a pointer to the parent directory name of the file path name.

eaccess Determine if the effective user ID has the appropriate permissions on a file.

gmatch Check if name matches shell file name pattern.

isencrypt Use heuristics to determine if contents of a character buffer are encrypted.

mkdirp Create a directory and its parents.

p2open p2close p2open is similar to popen (see popen(S)). It establishes a two-way connection between the parent and the child. p2close closes the pipe.

pathfind Search the directories in a given path for a named file with given mode characteristics. If the file is found, a pointer is returned to a string that corresponds to the path name of the file. A null pointer is returned if no file is found.

regcmp Compile a regular expression and return a pointer to the compiled form.

regex Compare a compiled regular expression against a subject string.

rmdirp Remove the directories in the specified path.

strccpy strcadd strccpy copies the input string to the output string, compressing any C-like escape sequences to the real character. strcadd is a similar function that returns the address of the null byte at the end of the output string.

strecpy Copy the input string to the output string, expanding any non-graphic characters with the C escape sequence. Characters in a third argument are not expanded.

strfind Return the offset of the first occurrence of the second string in the first string. -1 is returned if the second string does not occur in the first.

strrspn Trim trailing characters from a string. It returns a pointer to the last character in the string not in a list of trailing characters.

strtrns Return a pointer to the string that results from replacing any character found in two strings with a character from a third string. This function is similar to the tr command.

advance step	Execute a regular expression on a string.
basename	Return a pointer to the last element of a path name.
bgets	Read a specified number of characters into a buffer from a stream until a specified character is reached.
bufsplit	Split the buffer into fields delimited by tabs and new-lines.
compile	Return a pointer to a compiled regular expression that uses the same syntax as ed.
copylist	Copy a file into a block of memory, replacing new-lines with null characters. It returns a pointer to the copy.
dirname	Return a pointer to the parent directory name of the file path name.
eaccess	Determine if the effective user ID has the appropriate permissions on a file.
gmatch	Check if name matches shell file name pattern.
isencrypt	Use heuristics to determine if contents of a character buffer are encrypted.
mkdirp	Create a directory and its parents.
p2open p2close	p2open is similar to popen (see popen(S)). It establishes a two-way connection between the parent and the child. p2close closes the pipe.
pathfind	Search the directories in a given path for a named file with given mode characteristics. If the file is found, a pointer is returned to a string that corresponds to the path name of the file. A null pointer is returned if no file is found.
regcmp	Compile a regular expression and return a pointer to the compiled form.
regex	Compare a compiled regular expression against a subject string.
rmdirp	Remove the directories in the specified path.
strccpy strcadd	strccpy copies the input string to the output string, compressing any C-like escape sequences to the real character. strcadd is a similar function that returns the address of the null byte at the end of the output string.
strecpy	Copy the input string to the output string, expanding any non-graphic characters with the C escape sequence. Characters in a third argument are not expanded.
strfind	Return the offset of the first occurrence of the second string in the first string. -1 is returned if the second string does not occur in the first.
strrspn	Trim trailing characters from a string. It returns a pointer to the last character in the string not in a list of trailing characters.
strtrns	Return a pointer to the string that results from replacing any character found in two strings with a character from a third string. This function is similar to the tr command.