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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <limits.h>
static char pwd[PATH_MAX + 1];
typedef struct {
const char *const c_name;
int c_val;
} CODE;
CODE prioritynames[] = {
{ "alert", LOG_ALERT },
{ "crit", LOG_CRIT },
{ "debug", LOG_DEBUG },
{ "emerg", LOG_EMERG },
{ "err", LOG_ERR },
{ "error", LOG_ERR },
{ "info", LOG_INFO },
{ "notice", LOG_NOTICE },
{ "panic", LOG_EMERG },
{ "warn", LOG_WARNING },
{ "warning", LOG_WARNING },
{ 0, -1 }
};
CODE facilitynames[] = {
{ "auth", LOG_AUTH },
{ "authpriv", LOG_AUTHPRIV },
{ "cron", LOG_CRON },
{ "daemon", LOG_DAEMON },
{ "ftp", LOG_FTP },
{ "kern", LOG_KERN },
{ "lpr", LOG_LPR },
{ "mail", LOG_MAIL },
{ "news", LOG_NEWS },
{ "security", LOG_AUTH },
{ "syslog", LOG_SYSLOG },
{ "user", LOG_USER },
{ "uucp", LOG_UUCP },
{ "local0", LOG_LOCAL0 },
{ "local1", LOG_LOCAL1 },
{ "local2", LOG_LOCAL2 },
{ "local3", LOG_LOCAL3 },
{ "local4", LOG_LOCAL4 },
{ "local5", LOG_LOCAL5 },
{ "local6", LOG_LOCAL6 },
{ "local7", LOG_LOCAL7 },
{ 0, -1 }
};
static void
strpriority(char *s, int *facility, int *level)
{
char *p;
CODE *cp;
if ((p = strchr(s, '.'))) {
*p++ = 0;
for (cp = prioritynames; cp->c_name; cp++) {
if (strcmp(cp->c_name, p) == 0)
*level = cp->c_val;
}
}
if (*s)
for (cp = facilitynames; cp->c_name; cp++) {
if (strcmp(cp->c_name, s) == 0)
*facility = cp->c_val;
}
}
int
main(int argc, char *argv[])
{
char c, *p, *argv0;
char *tag = "vlogger";
int facility = LOG_DAEMON;
int level = LOG_INFO;
size_t pwdlen = 0;
argv0 = *argv;
if (!strcmp(argv0, "./run")) {
p = getcwd(pwd, sizeof(pwd));
if (p == NULL) {
/* FIXME: roll our own getcwd that does dynamic allocation? */
fprintf(stderr, "vlogger: getcwd: %s\n", strerror(errno));
exit(1);
}
if (pwd[0] != '/') {
fprintf(stderr, "Current working directory is not reachable or not absolute.\n");
exit(1);
}
pwdlen = strlen(pwd);
if (pwd[pwdlen - 1] == '/')
pwd[pwdlen - 1] = '\0';
if ((p = strrchr(pwd, '/')) && !strncmp(p+1, "log", 3) &&
(*p = 0, (p = strrchr(pwd, '/'))) && (*(p + 1) != 0)) {
if (!(tag = strdup(p+1))) {
fprintf(stderr, "vlogger: strdup: %s\n", strerror(errno));
exit(1);
}
}
}
while ((c = getopt(argc, argv, "p:t:")) != -1)
switch (c) {
case 'p': strpriority(optarg, &facility, &level); break;
case 't': tag = optarg; break;
default:
fprintf(stderr, "usage: vlogger [-p priority] [-t tag]\n");
exit(1);
}
if (access("/etc/vlogger", X_OK) != -1) {
execl("/etc/vlogger", argv0, tag, (char *)0);
fprintf(stderr, "vlogger: exec: %s\n", strerror(errno));
exit(1);
}
openlog(tag, 0, facility);
char *line;
size_t linelen = 0;
ssize_t rd;
while ((rd = getline(&line, &linelen, stdin)) != -1) {
if (line[rd-1] == '\n')
line[rd-1] = 0;
syslog(level|facility, "%s", line);
}
return 1;
}
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