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/* Reading file lists.
Copyright (C) 1995-1998, 2000-2002, 2007, 2015 Free Software
Foundation, Inc.
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 <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/* Specification. */
#include "file-list.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "str-list.h"
#include "error.h"
#include "gettext.h"
/* A convenience macro. I don't like writing gettext() every time. */
#define _(str) gettext (str)
/* Read list of filenames from a file. */
string_list_ty *
read_names_from_file (const char *file_name)
{
size_t line_len = 0;
char *line_buf = NULL;
FILE *fp;
string_list_ty *result;
if (strcmp (file_name, "-") == 0)
fp = stdin;
else
{
fp = fopen (file_name, "r");
if (fp == NULL)
error (EXIT_FAILURE, errno,
_("error while opening \"%s\" for reading"), file_name);
}
result = string_list_alloc ();
while (!feof (fp))
{
/* Read next line from file. */
int len = getline (&line_buf, &line_len, fp);
/* In case of an error leave loop. */
if (len < 0)
break;
/* Remove trailing '\n' and trailing whitespace. */
if (len > 0 && line_buf[len - 1] == '\n')
line_buf[--len] = '\0';
while (len > 0
&& (line_buf[len - 1] == ' '
|| line_buf[len - 1] == '\t'
|| line_buf[len - 1] == '\r'))
line_buf[--len] = '\0';
/* Test if we have to ignore the line. */
if (*line_buf == '\0' || *line_buf == '#')
continue;
string_list_append_unique (result, line_buf);
}
/* Free buffer allocated through getline. */
if (line_buf != NULL)
free (line_buf);
/* Close input stream. */
if (fp != stdin)
fclose (fp);
return result;
}
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