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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, "st:p:", 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 *priority;
char *ident;
)
// find str in names[], accepting unambiguous short matches
// returns offset into array of match, or -1 if no match
int arrayfind(char *str, char *names[], int len)
{
int try, i, matchlen = 0, found = -1, ambiguous = 1;
for (try = 0; try<len; try++) {
for (i=0; ; i++) {
if (!str[i]) {
if (matchlen<i) found = try, ambiguous = 0;
if (matchlen==i) ambiguous++;
if (!names[try][i]) return try;
break;
}
if (!names[try][i]) break;
if (toupper(str[i]) != toupper(names[try][i])) break;
}
}
return ambiguous ? -1 : found;
}
void logger_main(void)
{
int facility = LOG_USER, priority = LOG_NOTICE, len;
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.ident) TT.ident = xstrdup(xgetpwuid(geteuid())->pw_name);
if (toys.optflags & FLAG_p) {
if (!(s1 = strchr(TT.priority, '.'))) s1 = TT.priority;
else {
*s1++ = len = 0;
facility = arrayfind(TT.priority, facilities, ARRAY_LEN(facilities));
if (facility == -1 && strncasecmp(TT.priority, "local", 5)) {
facility = s1[5]-'0';
if (facility>7 || s1[6]) facility = -1;
if (facility>=0) facility += 16;
}
if (facility<0) error_exit("bad facility: %s", TT.priority);
facility *= 8;
}
priority = arrayfind(s1, priorities, ARRAY_LEN(priorities));
if (priority<0) error_exit("bad priority: %s", s1);
}
if (toys.optc) {
for (len = 0, 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, toybuf, sizeof(toybuf)-1)] = 0;
s1 = toybuf;
}
openlog(TT.ident, LOG_PERROR*!!(toys.optflags&FLAG_s), facility);
syslog(priority, "%s", s1);
closelog();
}
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