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#include <sys/types.h>
#if !defined(__OpenBSD__)
#define __USE_GNU
#define _GNU_SOURCE
#endif
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <err.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>
#include <string.h>
#include "libglouglou.h"
FILE *_logfile;
static int _loglevel;
static void logit(int, const char *, const char *, va_list);
/*
* Log
* handles only one log file per process
*/
int
gg_log_init(char *filename, int level)
{
_logfile = fopen(filename, "a+");
if (!_logfile) {
printf("cannot open log file %s!\n", filename);
return -1;
}
_loglevel = level;
return 0;
}
void
gg_log_shutdown(void)
{
fclose(_logfile);
}
void
gg_log_tmp(const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
logit(GGLOG_FORCED, "XXX ", msg, ap);
va_end(ap);
}
void
gg_log_debug(const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
logit(GGLOG_DEBUG, "", msg, ap);
va_end(ap);
}
void
gg_log_info(const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
logit(GGLOG_INFO, "", msg, ap);
va_end(ap);
}
void
gg_log_warn(const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
logit(GGLOG_WARN, "", msg, ap);
va_end(ap);
}
#if defined(__OpenBSD__)
void __dead
#else
void
#endif
gg_log_fatal(const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
logit(GGLOG_FATAL, "fatal: ", msg, ap);
va_end(ap);
exit(1);
}
/* XXX mpsafe */
static void
logit(int level, const char *prefix, const char *msg, va_list ap)
{
time_t clock;
if (level <= _loglevel) {
time(&clock);
fprintf(_logfile, "%d ", (int)clock);
vfprintf(_logfile, prefix, ap);
vfprintf(_logfile, msg, ap);
fprintf(_logfile, "\n");
fflush(_logfile);
}
}
/*
* Various utils
*/
void *
xmalloc(size_t size)
{
void *data;
data = malloc(size);
if (!data)
err(1, "could not malloc %d", (int)size);
return data;
}
void *
xcalloc(size_t nmemb, size_t size)
{
void *data;
data = calloc(nmemb, size);
if (!data)
err(1, "could not calloc %d", (int)size);
return data;
}
void
fd_nonblock(int fd)
{
int flags = fcntl(fd, F_GETFL, 0);
int rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
if (rc == -1)
err(1, "failed to set fd %i non-blocking", fd);
}
void
addrcpy(struct sockaddr_in *dst, struct sockaddr_in *src)
{
dst->sin_addr.s_addr = src->sin_addr.s_addr;
dst->sin_port = src->sin_port;
dst->sin_family = src->sin_family;
}
int
addrcmp(struct sockaddr_in *a, struct sockaddr_in *b)
{
if (a->sin_addr.s_addr != b->sin_addr.s_addr)
return -1;
if (a->sin_port != b->sin_port)
return -2;
if (a->sin_family != b->sin_family)
return -3;
return 0;
}
void
droppriv(char *user, int do_chroot, char *chroot_path)
{
struct passwd *pw;
pw = getpwnam(user);
if (!pw)
err(1, "unknown user %s", user);
if (do_chroot) {
if (!chroot_path)
chroot_path = pw->pw_dir;
if (chroot(chroot_path) != 0)
err(1, "unable to chroot");
}
if (chdir("/") != 0)
err(1, "unable to chdir");
if (setgroups(1, &pw->pw_gid) == -1)
err(1, "setgroups() failed");
if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1)
err(1, "setresgid failed");
if (setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1)
err(1, "setresuid() failed");
endpwent();
}
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