NAME
pathfind() — search for named file in named directories
SYNOPSIS
#include <libgen.h>
char *pathfind (const
char *path,
const char *name,
const char *mode);
DESCRIPTION
pathfind
searches the directories named in
path
for the file
name.
The directories named in
path
are separated by colons.
mode
is a string of option letters chosen from the set
rwxfbcdpugks:
Options read, write, and execute are checked relative to the
real (not the effective) user ID and group ID of the
current process.
If the file
name,
with all the characteristics specified by
mode,
is found in any of the directories specified by
path,
then
pathfind
returns a pointer to a string containing the member of
path,
followed by a slash character
(/),
followed by
name.
If
name
begins with a slash,
it is treated as an absolute path name, and
path
is ignored.
An empty
path
member is treated as the current directory.
.
is not prepended at the occurrence of the first match;
rather, the unadorned
name
is returned.
To use this interface, link in the libgen library by specifying
-lgen.
For example:
RETURN VALUE
If no match is found,
pathname
returns a null pointer,
((char *) 0).
EXAMPLES
To find the
ls
command using the
PATH
environment variable:
pathfind (getenv ("PATH"), "ls", "rx")
WARNINGS
The string pointed to by the returned pointer is stored in a static
area that is reused on subsequent calls to
pathfind.
Printable version
