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/* $OpenBSD: common.c,v 1.2 2006/03/11 07:12:42 ray Exp $ */
/*
* Written by Raymond Lai <ray@cyth.net>.
* Public domain.
*/
#include <err.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "common.h"
void
cleanup(const char *filename)
{
if (unlink(filename))
err(2, "could not delete: %s", filename);
exit(2);
}
/*
* Creates and returns the name of a temporary file. Takes a string
* (or NULL) is written to the temporary file. The returned string
* needs to be freed.
*/
char *
xmktemp(const char *s)
{
FILE *file;
int fd;
const char *tmpdir;
char *filename;
/* If TMPDIR is set, use it; otherwise use _PATH_TMP. */
if (!(tmpdir = getenv("TMPDIR")))
tmpdir = _PATH_TMP;
if (asprintf(&filename, "%s/sdiff.XXXXXXXXXX", tmpdir) == -1)
err(2, "xmktemp");
/* Create temp file. */
if ((fd = mkstemp(filename)) == -1)
err(2, "could not create temporary file");
/* If we don't write anything to the file, just close. */
if (s == NULL) {
close(fd);
return (filename);
}
/* Open temp file for writing. */
if ((file = fdopen(fd, "w")) == NULL) {
warn("could not open %s", filename);
cleanup(filename);
/* NOTREACHED */
}
/* Write to file. */
if (fputs(s, file)) {
warn("could not write to %s", filename);
cleanup(filename);
/* NOTREACHED */
}
/* Close temp file. */
fclose(file);
return (filename);
}
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