sbase

suckless unix tools
git clone git://git.2f30.org/sbase.git
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commit 5d1e46fefa12eae9fd7e6321b0ab1c8f4a304fa3
parent 757cf0651aed57015b508861aeeaf72f93b3950e
Author: sin <sin@2f30.org>
Date:   Thu Dec  4 11:34:39 +0000

Implement POSIX 2008 compliant logger(1)

Diffstat:
Makefile | 1+
README | 1+
TODO | 1-
logger.1 | 50++++++++++++++++++++++++++++++++++++++++++++++++++
logger.c | 106+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 158 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile @@ -85,6 +85,7 @@ BIN =\ kill\ link\ ln\ + logger\ logname\ ls\ md5sum\ diff --git a/README b/README @@ -36,6 +36,7 @@ hostname kill yes none link ln +logger yes logname ls md5sum diff --git a/TODO b/TODO @@ -13,7 +13,6 @@ find getconf install join -logger make od patch diff --git a/logger.1 b/logger.1 @@ -0,0 +1,50 @@ +.Dd December 4, 2014 +.Dt LOGGER 1 sbase\-VERSION +.Os +.Sh NAME +.Nm logger +.Nd make entries in the system log +.Sh SYNOPSIS +.Nm logger +.Op Fl is +.Op Fl p Ar priority +.Op Fl t Ar tag +.Op Ar message ... +.Sh DESCRIPTION +.Nm +provides a shell command interface to the +.Xr syslog 3 +system log module. +.Pp +.Sh OPTIONS +.Bl -tag -width xxxxxxxxxxxx +.It Fl i +Log the process ID of the logger process with each line. +.It Fl p Ar priority +Enter the message with the specified priority. They priority +has to be specified symbolically as +.Dq facility.level +pair. The default is +.Dq user.notice . +.It Fl s +Log the message to standard error, as well as the system log. +.It Fl t Ar tag +Mark every line in the log with the specified +.Ar tag . +.It Ar message +Write the message to the log; if not specified, standard input +is logged. +.El +.Sh SEE ALSO +.Xr syslog 3 , +.Xr syslogd 1 +.Sh STANDARDS +The +.Nm +utility is compliant with the +.St -p1003.1-2008 +specification. +.Pp +The flags +.Op Fl ipst +are extensions to that specification. diff --git a/logger.c b/logger.c @@ -0,0 +1,106 @@ +/* See LICENSE file for copyright and license details. */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <strings.h> +#define SYSLOG_NAMES +#include <syslog.h> +#include <unistd.h> + +#include "util.h" + +int +decodefac(char *fac) +{ + CODE *c; + int facility = -1; + + for (c = facilitynames; c->c_name; c++) + if (!strcasecmp(fac, c->c_name)) + facility = c->c_val; + if (facility == -1) + eprintf("invalid facility name: %s\n", fac); + return facility & LOG_FACMASK; +} + +int +decodelev(char *lev) +{ + CODE *c; + int level = -1; + + for (c = prioritynames; c->c_name; c++) + if (!strcasecmp(lev, c->c_name)) + level = c->c_val; + if (level == -1) + eprintf("invalid level name: %s\n", lev); + return level & LOG_PRIMASK; +} + +int +decodepri(char *pri) +{ + char *p; + + if (!(p = strchr(pri, '.'))) + eprintf("invalid priority name: %s\n", pri); + *p++ = '\0'; + if (!*p) + eprintf("invalid priority name: %s\n", pri); + return decodefac(pri) | decodelev(p); +} + +static void +usage(void) +{ + eprintf("usage: %s [-is] [-p priority] [-t tag] [message ...]\n", argv0); +} + +int +main(int argc, char *argv[]) +{ + char *buf = NULL, *tag = NULL; + size_t sz = 0; + int logflags = 0, priority = LOG_NOTICE; + int i; + + ARGBEGIN { + case 'i': + logflags |= LOG_PID; + break; + case 'p': + priority = decodepri(EARGF(usage())); + break; + case 's': + logflags |= LOG_PERROR; + break; + case 't': + tag = EARGF(usage()); + break; + default: + usage(); + } ARGEND; + + openlog(tag ? tag : getlogin(), logflags, 0); + + if (argc == 0) { + while(getline(&buf, &sz, stdin) != -1) + syslog(priority, "%s", buf); + if (ferror(stdin)) + eprintf("%s: read error:", "<stdin>"); + } else { + for (i = 0; i < argc; i++) + sz += strlen(argv[i]); + sz += argc; + buf = ecalloc(1, sz); + for (i = 0; i < argc; i++) { + strlcat(buf, argv[i], sz); + if (i + 1 < argc) + strlcat(buf, " ", sz); + } + syslog(priority, "%s", buf); + } + free(buf); + closelog(); + return 0; +}