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-rw-r--r--src/postlog/postlog.c298
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diff --git a/src/postlog/postlog.c b/src/postlog/postlog.c
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+/*++
+/* NAME
+/* postlog 1
+/* SUMMARY
+/* Postfix-compatible logging utility
+/* SYNOPSIS
+/* .fi
+/* .ad
+/* \fBpostlog\fR [\fB-iv\fR] [\fB-c \fIconfig_dir\fR]
+/* [\fB-p \fIpriority\fR] [\fB-t \fItag\fR] [\fItext...\fR]
+/* DESCRIPTION
+/* The \fBpostlog\fR(1) command implements a Postfix-compatible logging
+/* interface for use in, for example, shell scripts.
+/*
+/* By default, \fBpostlog\fR(1) logs the \fItext\fR given on the command
+/* line as one record. If no \fItext\fR is specified on the command
+/* line, \fBpostlog\fR(1) reads from standard input and logs each input
+/* line as one record.
+/*
+/* By default, logging is sent to \fBsyslogd\fR(8) or
+/* \fBpostlogd\fR(8); when the
+/* standard error stream is connected to a terminal, logging
+/* is sent there as well.
+/*
+/* The following options are implemented:
+/* .IP "\fB-c \fIconfig_dir\fR"
+/* Read the \fBmain.cf\fR configuration file in the named directory
+/* instead of the default configuration directory.
+/* .IP "\fB-i\fR (obsolete)"
+/* Include the process ID in the logging tag. This flag is ignored as
+/* of Postfix 3.4, where the PID is always included.
+/* .IP "\fB-p \fIpriority\fR (default: \fBinfo\fR)"
+/* Specifies the logging severity: \fBinfo\fR, \fBwarn\fR,
+/* \fBerror\fR, \fBfatal\fR, or \fBpanic\fR. With Postfix 3.1
+/* and later, the program will pause for 1 second after reporting
+/* a \fBfatal\fR or \fBpanic\fR condition, just like other
+/* Postfix programs.
+/* .IP "\fB-t \fItag\fR"
+/* Specifies the logging tag, that is, the identifying name that
+/* appears at the beginning of each logging record. A default tag
+/* is used when none is specified.
+/* .IP \fB-v\fR
+/* Enable verbose logging for debugging purposes. Multiple \fB-v\fR
+/* options make the software increasingly verbose.
+/* ENVIRONMENT
+/* .ad
+/* .fi
+/* .IP MAIL_CONFIG
+/* Directory with the \fBmain.cf\fR file.
+/* CONFIGURATION PARAMETERS
+/* .ad
+/* .fi
+/* The following \fBmain.cf\fR parameters are especially relevant to
+/* this program.
+/*
+/* The text below provides only a parameter summary. See
+/* \fBpostconf\fR(5) for more details including examples.
+/* .IP "\fBconfig_directory (see 'postconf -d' output)\fR"
+/* The default location of the Postfix main.cf and master.cf
+/* configuration files.
+/* .IP "\fBimport_environment (see 'postconf -d' output)\fR"
+/* The list of environment parameters that a privileged Postfix
+/* process will import from a non-Postfix parent process, or name=value
+/* environment overrides.
+/* .IP "\fBsyslog_facility (mail)\fR"
+/* The syslog facility of Postfix logging.
+/* .IP "\fBsyslog_name (see 'postconf -d' output)\fR"
+/* A prefix that is prepended to the process name in syslog
+/* records, so that, for example, "smtpd" becomes "prefix/smtpd".
+/* .PP
+/* Available in Postfix 3.4 and later:
+/* .IP "\fBmaillog_file (empty)\fR"
+/* The name of an optional logfile that is written by the Postfix
+/* \fBpostlogd\fR(8) service.
+/* .IP "\fBpostlog_service_name (postlog)\fR"
+/* The name of the \fBpostlogd\fR(8) service entry in master.cf.
+/* SEE ALSO
+/* postconf(5), configuration parameters
+/* postlogd(8), Postfix logging
+/* syslogd(8), system logging
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#ifdef STRCASECMP_IN_STRINGS_H
+#include <strings.h>
+#endif
+
+/* Utility library. */
+
+#include <msg.h>
+#include <vstring.h>
+#include <vstream.h>
+#include <vstring_vstream.h>
+#include <msg_output.h>
+#include <msg_vstream.h>
+#include <warn_stat.h>
+#include <clean_env.h>
+
+/* Global library. */
+
+#include <mail_params.h> /* XXX right place for LOG_FACILITY? */
+#include <mail_version.h>
+#include <mail_conf.h>
+#include <mail_task.h>
+#include <mail_parm_split.h>
+#include <maillog_client.h>
+
+/* Application-specific. */
+
+ /*
+ * Support for the severity level mapping.
+ */
+struct level_table {
+ char *name;
+ int level;
+};
+
+static struct level_table level_table[] = {
+ "info", MSG_INFO,
+ "warn", MSG_WARN,
+ "warning", MSG_WARN,
+ "error", MSG_ERROR,
+ "err", MSG_ERROR,
+ "fatal", MSG_FATAL,
+ "crit", MSG_FATAL,
+ "panic", MSG_PANIC,
+ 0,
+};
+
+/* level_map - lookup facility or severity value */
+
+static int level_map(char *name)
+{
+ struct level_table *t;
+
+ for (t = level_table; t->name; t++)
+ if (strcasecmp(t->name, name) == 0)
+ return (t->level);
+ msg_fatal("bad severity: \"%s\"", name);
+}
+
+/* log_argv - log the command line */
+
+static void log_argv(int level, char **argv)
+{
+ VSTRING *buf = vstring_alloc(100);
+
+ while (*argv) {
+ vstring_strcat(buf, *argv++);
+ if (*argv)
+ vstring_strcat(buf, " ");
+ }
+ msg_printf(level, "%s", vstring_str(buf));
+ vstring_free(buf);
+}
+
+/* log_stream - log lines from a stream */
+
+static void log_stream(int level, VSTREAM *fp)
+{
+ VSTRING *buf = vstring_alloc(100);
+
+ while (vstring_get_nonl(buf, fp) != VSTREAM_EOF)
+ msg_printf(level, "%s", vstring_str(buf));
+ vstring_free(buf);
+}
+
+MAIL_VERSION_STAMP_DECLARE;
+
+/* main - logger */
+
+int main(int argc, char **argv)
+{
+ struct stat st;
+ int fd;
+ int ch;
+ const char *tag;
+ int level = MSG_INFO;
+ ARGV *import_env;
+
+ /*
+ * Fingerprint executables and core dumps.
+ */
+ MAIL_VERSION_STAMP_ALLOCATE;
+
+ /*
+ * Be consistent with file permissions.
+ */
+ umask(022);
+
+ /*
+ * To minimize confusion, make sure that the standard file descriptors
+ * are open before opening anything else. XXX Work around for 44BSD where
+ * fstat can return EBADF on an open file descriptor.
+ */
+ for (fd = 0; fd < 3; fd++)
+ if (fstat(fd, &st) == -1
+ && (close(fd), open("/dev/null", O_RDWR, 0)) != fd)
+ msg_fatal("open /dev/null: %m");
+
+ /*
+ * Set up diagnostics.
+ */
+ tag = mail_task(argv[0]);
+ if (isatty(STDERR_FILENO))
+ msg_vstream_init(tag, VSTREAM_ERR);
+ maillog_client_init(tag, MAILLOG_CLIENT_FLAG_LOGWRITER_FALLBACK);
+
+ /*
+ * Check the Postfix library version as soon as we enable logging.
+ */
+ MAIL_VERSION_CHECK;
+
+ /*
+ * Parse switches.
+ */
+ tag = 0;
+ while ((ch = GETOPT(argc, argv, "c:ip:t:v")) > 0) {
+ switch (ch) {
+ default:
+ msg_fatal("usage: %s [-c config_dir] [-i] [-p priority] [-t tag] [-v] [text]", argv[0]);
+ break;
+ case 'c':
+ if (setenv(CONF_ENV_PATH, optarg, 1) < 0)
+ msg_fatal("out of memory");
+ break;
+ case 'i':
+ break;
+ case 'p':
+ level = level_map(optarg);
+ break;
+ case 't':
+ tag = optarg;
+ break;
+ case 'v':
+ msg_verbose++;
+ break;
+ }
+ }
+
+ /*
+ * Process the main.cf file. This may change the syslog_name setting and
+ * may require that mail_task() be re-evaluated.
+ */
+ mail_conf_read();
+ /* Enforce consistent operation of different Postfix parts. */
+ import_env = mail_parm_split(VAR_IMPORT_ENVIRON, var_import_environ);
+ update_env(import_env->argv);
+ argv_free(import_env);
+ if (tag == 0)
+ tag = mail_task(argv[0]);
+
+ /*
+ * Re-initialize the logging, this time with the tag specified in main.cf
+ * or on the command line.
+ */
+ if (isatty(STDERR_FILENO))
+ msg_vstream_init(tag, VSTREAM_ERR);
+ maillog_client_init(tag, MAILLOG_CLIENT_FLAG_LOGWRITER_FALLBACK);
+
+ /*
+ * Log the command line or log lines from standard input.
+ */
+ if (argc > optind) {
+ log_argv(level, argv + optind);
+ } else {
+ log_stream(level, VSTREAM_IN);
+ }
+
+ /*
+ * Consistency with msg(3) functions.
+ */
+ if (level >= MSG_FATAL)
+ sleep(1);
+ exit(0);
+}