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FreeBSD 11.0 - man page for catopen (freebsd section 3)

CATOPEN(3)						   BSD Library Functions Manual 						CATOPEN(3)

NAME
catopen -- 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 substitutions: %N The value of the name argument. %L The value of the LANG environment variable or the LC_MESSAGES category (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 determines 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 descriptor. 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 catalog, 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 ALSO
gencat(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

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