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