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/* logger.c - Log messages.
*
* Copyright 2013 Ilya Kuzmich <ilya.kuzmich@gmail.com>
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/logger.html
*
* Deviations from posix: specified manner and format, defined implementation.
USE_LOGGER(NEWTOY(logger, "t:p:s", TOYFLAG_USR|TOYFLAG_BIN))
config LOGGER
bool "logger"
default y
help
usage: logger [-s] [-t TAG] [-p [FACILITY.]PRIORITY] [MESSAGE...]
Log message (or stdin) to syslog.
-s Also write message to stderr
-t Use TAG instead of username to identify message source
-p Specify PRIORITY with optional FACILITY. Default is "user.notice"
*/
#define FOR_logger
#include "toys.h"
GLOBALS(
char *p, *t;
)
// find str in names[], accepting unambiguous short matches
// returns offset into array of match, or -1 if no match
// TODO: move to lib?
static int arrayfind(char *str, char *names[], int len)
{
int j, i, ll = 0, maybe = -1;
for (j = 0; j<len; j++) for (i=0; ; i++) {
if (!str[i]) {
if (!names[j][i]) return j;
if (i>ll) maybe = j;
else if (i==ll) maybe = -1;
break;
}
if (!names[j][i] || toupper(str[i])!=toupper(names[j][i])) break;
}
return maybe;
}
void logger_main(void)
{
int facility = LOG_USER, priority = LOG_NOTICE, len = 0;
char *s1, *s2, **arg,
*priorities[] = {"emerg", "alert", "crit", "error", "warning", "notice",
"info", "debug"},
*facilities[] = {"kern", "user", "mail", "daemon", "auth", "syslog",
"lpr", "news", "uucp", "cron", "authpriv", "ftp"};
if (!TT.t) TT.t = xgetpwuid(geteuid())->pw_name;
if (TT.p) {
if (!(s1 = strchr(TT.p, '.'))) s1 = TT.p;
else {
*s1++ = 0;
facility = arrayfind(TT.p, facilities, ARRAY_LEN(facilities));
if (facility<0) {
if (sscanf(TT.p, "local%d", &facility)>0 && !(facility&~7))
facility += 16;
else error_exit("bad facility: %s", TT.p);
}
facility *= 8;
}
priority = arrayfind(s1, priorities, ARRAY_LEN(priorities));
if (priority<0) error_exit("bad priority: %s", s1);
}
if (toys.optc) {
for (arg = toys.optargs; *arg; arg++) len += strlen(*arg)+1;
s1 = s2 = xmalloc(len);
for (arg = toys.optargs; *arg; arg++) {
if (arg != toys.optargs) *s2++ = ' ';
s2 = stpcpy(s2, *arg);
}
} else toybuf[readall(0, s1 = toybuf, sizeof(toybuf)-1)] = 0;
openlog(TT.t, LOG_PERROR*FLAG(s), facility);
syslog(priority, "%s", s1);
closelog();
}
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