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/*
$Id: log.c,v 1.9 2002/02/10 19:31:54 matt Exp $
See COPYRIGHT for the license
*/
#include <sys/param.h>
#include <unistd.h>
#include <stdarg.h>
#include <syslog.h>
#include <stdio.h>
#include <pwd.h>
#include "ssmtp.h"
extern char *prog_name;
extern int log_level;
void log_event(int priority, char *format, ...)
{
char buf[(BUF_SZ + 1)];
va_list ap;
va_start(ap, format);
(void)vsnprintf(buf, BUF_SZ, format, ap);
va_end(ap);
#ifdef LOGFILE
if((fp = fopen("/tmp/ssmtp.log", "a")) != (FILE *)NULL) {
(void)fprintf(fp, "%s\n", buf);
(void)fclose(fp);
}
else {
(void)fprintf(stderr, "Can't write to /tmp/ssmtp.log\n");
}
#endif
#if HAVE_SYSLOG_H
#if OLDSYSLOG
openlog("sSMTP", LOG_PID);
#else
openlog("sSMTP", LOG_PID, LOG_MAIL);
#endif
syslog(priority, "%s", buf);
closelog();
#endif
}
/*
dead_letter() -- save stdin to ~/dead.letter, if possible
*/
void dead_letter(void)
{
char path[(MAXPATHLEN + 1)], buf[(BUF_SZ + 1)];
struct passwd *pw;
uid_t uid;
FILE *fp;
uid = getuid();
pw = getpwuid(uid);
if(isatty(fileno(stdin))) {
if(log_level > 0) {
log_event(LOG_ERR, "stdin is a TTY - not saving to %s/dead.letter, pw->pw_dir");
}
return;
}
if(pw == (struct passwd *)NULL) {
/* Far to early to save things. */
if(log_level > 0) {
log_event(LOG_ERR, "No sender (can't happen), failing horribly");
}
return;
}
if(snprintf(path, BUF_SZ, "%s/dead.letter", pw->pw_dir) == -1) {
/* can't use die() here since dead_letter() is called from die() */
exit(1);
}
if((fp = fopen(path, "a")) == (FILE *)NULL) {
/* Perhaps the person doesn't have a homedir... */
if(log_level > 0) {
log_event(LOG_ERR, "Can't open %s, failing horribly!", path);
}
return;
}
/* Make sure we start on a new line, */
/* with a blank line separating messages. */
(void)fprintf(fp, "\n\n");
while(fgets(buf, sizeof(buf), stdin)) {
(void)fputs(buf, fp);
}
if(fclose(fp) == -1) {
if(log_level > 0) {
log_event(LOG_ERR, "Can't close %s/dead.letter, possibly truncated", pw->pw_dir);
}
}
}
void die(char *format, ...)
{
char buf[(BUF_SZ + 1)];
va_list ap;
va_start(ap, format);
(void)vsnprintf(buf, BUF_SZ, format, ap);
va_end(ap);
(void)fprintf(stderr, "%s: %s\n", prog_name, buf);
log_event(LOG_ERR, "%s", buf);
/* Send message to dead.letter */
(void)dead_letter();
exit(1);
}
void paq(char *format, ...)
{
va_list ap;
va_start(ap, format);
(void)vfprintf(stderr, format, ap);
va_end(ap);
exit(0);
}
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