Adding upstream version 3.7.10.upstream/3.7.10

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 372 insertions, 0 deletions

diff --git a/src/postlog/postlog.c b/src/postlog/postlog.c
new file mode 100644
index 0000000..eddc432
--- /dev/null
+++ b/src/postlog/postlog.c
@@ -0,0 +1,372 @@
+/*++
+/* 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.
+/* SECURITY
+/* .ad
+/* .fi
+/*	The \fBpostlog\fR(1) command is designed to run with
+/*	set-groupid privileges, so that it can connect to the
+/*	\fBpostlogd\fR(8) daemon process (Postfix 3.7 and later;
+/*	earlier implementations of this command must not have
+/*	set-groupid or set-userid permissions).
+/* 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.
+/* HISTORY
+/*	The \fBpostlog\fR(1) command was introduced with Postfix
+/*	version 3.4.
+/* 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>
+#include <stringops.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. */
+
+ /*
+  * WARNING WARNING WARNING
+  * 
+  * This software is designed to run set-gid. In order to avoid exploitation of
+  * privilege, this software should not run any external commands, nor should
+  * it take any information from the user, unless that information can be
+  * properly sanitized. To get an idea of how much information a process can
+  * inherit from a potentially hostile user, examine all the members of the
+  * process structure (typically, in /usr/include/sys/proc.h): the current
+  * directory, open files, timers, signals, environment, command line, umask,
+  * and so on.
+  */
+
+ /*
+  * Access lists.
+  */
+#if 0
+char   *var_postlog_acl;
+
+X static const CONFIG_STR_TABLE str_table[] = {
+    X VAR_POSTLOG_ACL, DEF_POSTLOG_ACL, &var_postlog_acl, 0, 0,
+    X 0,
+X};
+
+#endif
+
+ /*
+  * 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,
+};
+
+#define POSTLOG_CMD	"postlog"
+
+/* 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;
+    char   *unsanitized_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. Censor the process name: it is provided by the
+     * user.
+     */
+    argv[0] = POSTLOG_CMD;
+    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. This program is set-gid and must sanitize all
+     * command-line parameters. The configuration directory argument is
+     * validated by the mail configuration read routine. Don't do complex
+     * things until we have completed initializations.
+     */
+    unsanitized_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':
+	    unsanitized_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();
+    /* Re-evaluate mail_task() after reading main.cf. */
+    maillog_client_init(mail_task(POSTLOG_CMD), MAILLOG_CLIENT_FLAG_NONE);
+#if 0
+    mail_dict_init();				/* proxy, sql, ldap */
+    get_mail_conf_str_table(str_table);
+#endif
+
+    /*
+     * This program is designed to be set-gid, which makes it a potential
+     * target for attack. Strip and optionally override the process
+     * environment so that we don't have to trust the C library.
+     */
+    import_env = mail_parm_split(VAR_IMPORT_ENVIRON, var_import_environ);
+    clean_env(import_env->argv);
+    argv_free(import_env);
+
+    /*
+     * Sanitize the user-specified tag. The result depends on the value of
+     * var_smtputf8_enable, therefore this code is after the mail_conf_read()
+     * call.
+     */
+    if (unsanitized_tag != 0)
+	tag = printable(unsanitized_tag, '?');
+
+    /*
+     * 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);
+
+#if 0
+    uid_t   uid = getuid();
+
+    if (uid != 0 && uid != var_owner_uid
+	&& (errstr = check_user_acl_byuid(VAR_SHOWQ_ACL, var_showq_acl,
+					  uid)) != 0)
+	msg_fatal_status(EX_NOPERM,
+			 "User %s(%ld) is not allowed to invoke 'postlog'",
+			 errstr, (long) uid);
+#endif
+
+    /*
+     * 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);
+}