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/* $OpenBSD: output.c,v 1.6 2020/03/06 17:36:42 benno Exp $ */
/*
* Copyright (c) 2019 Theo de Raadt <deraadt@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/stat.h>
#include <err.h>
#include <fcntl.h>
#include <signal.h>
#include <string.h>
#include <limits.h>
#include <unistd.h>
#include <openssl/x509v3.h>
#include "extern.h"
char *outputdir;
char output_tmpname[PATH_MAX];
char output_name[PATH_MAX];
int outformats;
struct outputs {
int format;
char *name;
int (*fn)(FILE *, struct vrp_tree *);
} outputs[] = {
{ FORMAT_OPENBGPD, "openbgpd", output_bgpd },
{ FORMAT_BIRD, "bird1v4", output_bird1v4 },
{ FORMAT_BIRD, "bird1v6", output_bird1v6 },
{ FORMAT_BIRD, "bird", output_bird2 },
{ FORMAT_CSV, "csv", output_csv },
{ FORMAT_JSON, "json", output_json },
{ 0, NULL }
};
void sig_handler(int);
void set_signal_handler(void);
int
outputfiles(struct vrp_tree *v)
{
int i, rc = 0;
atexit(output_cleantmp);
set_signal_handler();
for (i = 0; outputs[i].name; i++) {
FILE *fout;
if (!(outformats & outputs[i].format))
continue;
fout = output_createtmp(outputs[i].name);
if (fout == NULL) {
logx("cannot create %s", outputs[i].name);
rc = 1;
continue;
}
if ((*outputs[i].fn)(fout, v) != 0) {
logx("output for %s format failed", outputs[i].name);
fclose(fout);
output_cleantmp();
rc = 1;
continue;
}
output_finish(fout);
}
return rc;
}
FILE *
output_createtmp(char *name)
{
FILE *f;
int fd, r;
r = snprintf(output_name, sizeof output_name,
"%s/%s", outputdir, name);
if (r < 0 || r > (int)sizeof(output_name))
err(1, "path too long");
r = snprintf(output_tmpname, sizeof output_tmpname,
"%s.XXXXXXXXXXX", output_name);
if (r < 0 || r > (int)sizeof(output_tmpname))
err(1, "path too long");
fd = mkostemp(output_tmpname, O_CLOEXEC);
if (fd == -1)
err(1, "mkostemp");
(void) fchmod(fd, 0644);
f = fdopen(fd, "w");
if (f == NULL)
err(1, "fdopen");
return f;
}
void
output_finish(FILE *out)
{
fclose(out);
out = NULL;
rename(output_tmpname, output_name);
output_tmpname[0] = '\0';
}
void
output_cleantmp(void)
{
if (*output_tmpname)
unlink(output_tmpname);
output_tmpname[0] = '\0';
}
/*
* Signal handler that clears the temporary files.
*/
void
sig_handler(int sig __unused)
{
output_cleantmp();
_exit(2);
}
/*
* Set signal handler on panic signals.
*/
void
set_signal_handler(void)
{
struct sigaction sa;
int i, signals[] = {SIGTERM, SIGHUP, SIGINT, SIGUSR1, SIGUSR2,
SIGPIPE, SIGXCPU, SIGXFSZ, 0};
memset(&sa, 0, sizeof(sa));
sigfillset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sa.sa_handler = sig_handler;
for (i = 0; signals[i] != 0; i++) {
if (sigaction(signals[i], &sa, NULL) == -1) {
warn("sigaction(%s)", strsignal(signals[i]));
continue;
}
}
}
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