CATOPEN(3) BSD Library Functions Manual CATOPEN(3)NAMEcatopen — open message catalog
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <nl_types.h>
nl_catd
catopen(const char *name, int oflag);
DESCRIPTION
The catopen() function opens the message catalog specified by name and
returns a message catalog descriptor. If name contains a ‘/’ then name
specifies the full pathname for the message catalog, otherwise the value
of the environment variable NLSPATH is used with the following substitu‐
tions:
%N The value of the name argument.
%L The value of the LANG environment variable or the LC_MESSAGES cate‐
gory (see below).
%l The language element from the LANG environment variable or from the
LC_MESSAGES category.
%t The territory element from the LANG environment variable or from the
LC_MESSAGES category.
%c The codeset element from the LANG environment variable or from the
LC_MESSAGES category.
%% A single % character.
An empty string is substituted for undefined values.
Path names templates defined in NLSPATH are separated by colons (‘:’). A
leading or two adjacent colons is equivalent to specifying %N.
If the oflag argument is set to the NL_CAT_LOCALE constant, LC_MESSAGES
locale category used to open the message catalog; using NL_CAT_LOCALE
conforms to the X/Open Portability Guide Issue 4 (“XPG4”) standard. You
can specify 0 for compatibility with X/Open Portability Guide Issue 3
(“XPG3”); when oflag is set to 0, the LANG environment variable deter‐
mines the message catalog locale.
A message catalog descriptor remains valid in a process until that
process closes it, or until a successful call to one of the exec(3) func‐
tion.
RETURN VALUES
Upon successful completion, catopen() returns a message catalog descrip‐
tor. Otherwise, (nl_catd) -1 is returned and errno is set to indicate
the error.
ERRORS
[EINVAL] Argument name does not point to a valid message cata‐
log, or catalog is corrupt.
[ENAMETOOLONG] An entire path to the message catalog exceeded 1024
characters.
[ENOENT] The named message catalog does not exists, or the name
argument points to an empty string.
[ENOMEM] Insufficient memory is available.
SEE ALSOgencat(1), catclose(3), catgets(3), setlocale(3)STANDARDS
The catopen() function conforms to IEEE Std 1003.1-2001 (“POSIX.1”).
BSD February 12, 2005 BSD
