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/*-
* Copyright (c) 2012 Dag-Erling Smørgrav
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: t_file.c 648 2013-03-05 17:54:27Z des $
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "openpam_asprintf.h"
#include "t.h"
static struct t_file *tflist;
/*
* Open a temp file.
*/
struct t_file *
t_fopen(const char *filename)
{
struct t_file *tf;
int fd;
if ((tf = calloc(sizeof *tf, 1)) == NULL)
err(1, "%s(): calloc()", __func__);
if (filename) {
if ((tf->name = strdup(filename)) == NULL)
err(1, "%s(): strdup()", __func__);
} else {
asprintf(&tf->name, "%s.%lu.%p.tmp",
t_progname, (unsigned long)getpid(), (void *)tf);
if (tf->name == NULL)
err(1, "%s(): asprintf()", __func__);
}
if ((fd = open(tf->name, O_RDWR|O_CREAT|O_TRUNC, 0600)) < 0)
err(1, "%s(): %s", __func__, tf->name);
if ((tf->file = fdopen(fd, "r+")) == NULL)
err(1, "%s(): fdopen()", __func__);
if ((tf->next = tflist) != NULL)
tf->next->prev = tf;
tflist = tf;
return (tf);
}
/*
* Write text to the temp file.
*/
int
t_fprintf(struct t_file *tf, const char *fmt, ...)
{
va_list ap;
int len;
va_start(ap, fmt);
len = vfprintf(tf->file, fmt, ap);
va_end(ap);
if (ferror(tf->file))
err(1, "%s(): vfprintf()", __func__);
return (len);
}
/*
* Rewind the temp file.
*/
void
t_frewind(struct t_file *tf)
{
errno = 0;
rewind(tf->file);
if (errno != 0)
err(1, "%s(): rewind()", __func__);
}
/*
* Return non-zero if an error occurred.
*/
int
t_ferror(struct t_file *tf)
{
return (ferror(tf->file));
}
/*
* Return non-zero if the end of the file was reached.
*/
int
t_feof(struct t_file *tf)
{
return (feof(tf->file));
}
/*
* Close a temp file.
*/
void
t_fclose(struct t_file *tf)
{
if (tf == tflist)
tflist = tf->next;
if (tf->prev)
tf->prev->next = tf->next;
if (tf->next)
tf->next->prev = tf->prev;
fclose(tf->file);
if (unlink(tf->name) < 0)
warn("%s(): unlink()", __func__);
free(tf->name);
free(tf);
}
/*
* atexit() function to close all remaining files.
*/
void
t_fcloseall(void)
{
while (tflist)
t_fclose(tflist);
}
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