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/* open-po - search for .po file along search path list and open for reading
Copyright (C) 1995-1996, 2000-2003, 2005-2009, 2020 Free Software Foundation, Inc.
Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, April 1995.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/* Specification. */
#include "open-catalog.h"
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dir-list.h"
#include "filename.h"
#include "concat-filename.h"
#include "xalloc.h"
#include "xvasprintf.h"
#include "po-xerror.h"
#include "gettext.h"
#define _(str) gettext (str)
/* This macro is used to determine the number of elements in an array. */
#define SIZEOF(a) (sizeof(a)/sizeof(a[0]))
static FILE *
try_open_catalog_file (const char *input_name, char **real_file_name_p)
{
static const char *extension[] = { "", ".po", ".pot", };
char *file_name;
FILE *ret_val;
int j;
size_t k;
const char *dir;
if (strcmp (input_name, "-") == 0 || strcmp (input_name, "/dev/stdin") == 0)
{
*real_file_name_p = xstrdup (_("<stdin>"));
return stdin;
}
/* We have a real name for the input file. */
if (IS_RELATIVE_FILE_NAME (input_name))
{
/* For relative file names, look through the directory search list,
trying the various extensions. If no directory search list is
specified, the current directory is used. */
for (j = 0; (dir = dir_list_nth (j)) != NULL; ++j)
for (k = 0; k < SIZEOF (extension); ++k)
{
file_name = xconcatenated_filename (dir, input_name, extension[k]);
ret_val = fopen (file_name, "r");
if (ret_val != NULL || errno != ENOENT)
{
/* We found the file. */
*real_file_name_p = file_name;
return ret_val;
}
free (file_name);
}
}
else
{
/* The name is not relative. Try the various extensions, but ignore the
directory search list. */
for (k = 0; k < SIZEOF (extension); ++k)
{
file_name = xconcatenated_filename ("", input_name, extension[k]);
ret_val = fopen (file_name, "r");
if (ret_val != NULL || errno != ENOENT)
{
/* We found the file. */
*real_file_name_p = file_name;
return ret_val;
}
free (file_name);
}
}
/* File does not exist. */
*real_file_name_p = xstrdup (input_name);
errno = ENOENT;
return NULL;
}
/* Open the input file with the name INPUT_NAME. The ending .po is added
if necessary. If INPUT_NAME is not an absolute file name and the file is
not found, the list of directories in "dir-list.h" is searched. The
file's pathname is returned in *REAL_FILE_NAME_P, for error message
purposes. */
FILE *
open_catalog_file (const char *input_name, char **real_file_name_p,
bool exit_on_error)
{
FILE *fp = try_open_catalog_file (input_name, real_file_name_p);
if (fp == NULL && exit_on_error)
{
const char *errno_description = strerror (errno);
po_xerror (PO_SEVERITY_FATAL_ERROR, NULL, NULL, 0, 0, false,
xasprintf ("%s: %s",
xasprintf (_("error while opening \"%s\" for reading"),
*real_file_name_p),
errno_description));
}
return fp;
}
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