commit 5d1e46fefa12eae9fd7e6321b0ab1c8f4a304fa3
parent 757cf0651aed57015b508861aeeaf72f93b3950e
Author: sin <sin@2f30.org>
Date: Thu, 4 Dec 2014 11:34:39 +0000
Implement POSIX 2008 compliant logger(1)
Diffstat:
| M | Makefile | | | 1 | + |
| M | README | | | 1 | + |
| M | TODO | | | 1 | - |
| A | logger.1 | | | 50 | ++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 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;
+}
