starlingx
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gplv2
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gplv2/bash/files/bash-history-syslog.patch

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From 33e9b03f81e871594b1f8ab1740c09cd5593c27c Mon Sep 17 00:00:00 2001
From: Scott Little <scott.little@windriver.com>
Date: Fri, 26 Aug 2016 16:04:44 -0400
Subject: [PATCH 1/2] WRS: Patch500: bash-history-syslog.patch
---
bashhist.c | 78 +-
config-top.h | 2 +-
shell.c | 111 +++
3 files changed, 173 insertions(+), 18 deletions(-)
diff --git a/bashhist.c b/bashhist.c
index 7240a5b..5116f8d 100644
--- a/bashhist.c
+++ b/bashhist.c
@@ -38,10 +38,6 @@
#include "bashintl.h"
-#if defined (SYSLOG_HISTORY)
-# include <syslog.h>
-#endif
-
#include "shell.h"
#include "flags.h"
#include "input.h"
@@ -54,6 +50,10 @@
#include <glob/glob.h>
#include <glob/strmatch.h>
+#if defined (SYSLOG_HISTORY)
+#include <sys/socket.h>
+#endif
+
#if defined (READLINE)
# include "bashline.h"
extern int rl_done, rl_dispatching; /* should really include readline.h */
@@ -68,6 +68,12 @@ static int check_history_control __P((char *));
static void hc_erasedups __P((char *));
static void really_add_history __P((char *));
+
+#if defined (SYSLOG_HISTORY)
+static void send_cmdline_mq __P((const char *));
+int cmdline_hist_sock[2];
+#endif
+
static struct ignorevar histignore =
{
"HISTIGNORE",
@@ -700,22 +706,11 @@ check_add_history (line, force)
}
#if defined (SYSLOG_HISTORY)
-#define SYSLOG_MAXLEN 600
-
void
bash_syslog_history (line)
const char *line;
{
- char trunc[SYSLOG_MAXLEN];
-
- if (strlen(line) < SYSLOG_MAXLEN)
- syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY: PID=%d UID=%d %s", getpid(), current_user.uid, line);
- else
- {
- strncpy (trunc, line, SYSLOG_MAXLEN);
- trunc[SYSLOG_MAXLEN - 1] = '\0';
- syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY (TRUNCATED): PID=%d UID=%d %s", getpid(), current_user.uid, trunc);
- }
+ send_cmdline_mq (line);
}
#endif
@@ -769,6 +764,10 @@ bash_add_history (line)
sprintf (new_line, "%s%s%s", current->line, chars_to_add, line);
offset = where_history ();
old = replace_history_entry (offset, new_line, current->data);
+
+#if defined (SYSLOG_HISTORY)
+ bash_syslog_history (new_line);
+#endif
free (new_line);
if (old)
@@ -779,11 +778,13 @@ bash_add_history (line)
}
if (add_it)
+ {
really_add_history (line);
#if defined (SYSLOG_HISTORY)
- bash_syslog_history (line);
+ bash_syslog_history (line);
#endif
+ }
using_history ();
}
@@ -906,4 +907,47 @@ history_should_ignore (line)
return match;
}
+
+#if defined (SYSLOG_HISTORY)
+
+#define MQ_SEND_MAX_ATTEMPT 2
+
+static void
+send_cmdline_mq (line)
+ const char *line;
+{
+ int ret = 0;
+ int attempt = 0;
+ int fail = 0;
+ size_t len_snd;
+ int sndbuf_size;
+
+ do {
+ if (attempt >= MQ_SEND_MAX_ATTEMPT)
+ {
+ fail = 1;
+ break;
+ }
+
+ len_snd = strlen(line)+1;
+ ret = send (cmdline_hist_sock[0], line, len_snd, MSG_DONTWAIT);
+ if (ret == EMSGSIZE)
+ {
+ socklen_t optlen = sizeof(sndbuf_size);
+ ret = getsockopt(cmdline_hist_sock[0], SOL_SOCKET, SO_SNDBUF,
+ &sndbuf_size, &optlen);
+ if (ret == 0) {
+ len_snd = sndbuf_size - 1;
+ continue;
+ }
+ }
+
+ attempt ++;
+ } while (ret < 0 && (errno == EAGAIN || errno == EINTR));
+
+ return;
+}
+
+#endif /*SYSLOG_HISTORY*/
+
#endif /* HISTORY */
diff --git a/config-top.h b/config-top.h
index 01e934e..c22c883 100644
--- a/config-top.h
+++ b/config-top.h
@@ -103,7 +103,7 @@
/* Define if you want each line saved to the history list in bashhist.c:
bash_add_history() to be sent to syslog(). */
-/* #define SYSLOG_HISTORY */
+#define SYSLOG_HISTORY
#if defined (SYSLOG_HISTORY)
# define SYSLOG_FACILITY LOG_USER
# define SYSLOG_LEVEL LOG_INFO
diff --git a/shell.c b/shell.c
index 6f9afcd..7eca4e3 100644
--- a/shell.c
+++ b/shell.c
@@ -72,6 +72,12 @@
# include <readline/history.h>
#endif
+#if defined (SYSLOG_HISTORY)
+# include <syslog.h>
+# include <sys/socket.h>
+# include "error.h"
+#endif
+
#if defined (READLINE)
# include "bashline.h"
#endif
@@ -106,6 +112,9 @@ extern int array_needs_making;
extern int gnu_error_format;
extern char *primary_prompt, *secondary_prompt;
extern char *this_command_name;
+#if defined (SYSLOG_HISTORY)
+extern int cmdline_hist_sock[2];
+#endif
/* Non-zero means that this shell has already been run; i.e. you should
call shell_reinitialize () if you need to start afresh. */
@@ -223,6 +232,7 @@ int dump_po_strings; /* Dump strings in $"..." in po format */
int wordexp_only = 0; /* Do word expansion only */
int protected_mode = 0; /* No command substitution with --wordexp */
+
#if defined (STRICT_POSIX)
int posixly_correct = 1; /* Non-zero means posix.2 superset. */
#else
@@ -327,6 +337,10 @@ static void shell_reinitialize __P((void));
static void show_shell_usage __P((FILE *, int));
+#if defined (SYSLOG_HISTORY)
+static pid_t make_consumer_process __P(());
+#endif
+
#ifdef __CYGWIN__
static void
_cygwin32_check_tmp ()
@@ -369,6 +383,11 @@ main (argc, argv, env)
env = environ;
#endif /* __OPENNT */
+
+#if defined (SYSLOG_HISTORY)
+ pid_t con_pid;
+#endif
+
USE_VAR(argc);
USE_VAR(argv);
USE_VAR(env);
@@ -747,6 +766,11 @@ main (argc, argv, env)
/* Initialize terminal state for interactive shells after the
.bash_profile and .bashrc are interpreted. */
get_tty_state ();
+
+#if defined (SYSLOG_HISTORY)
+ /*fork a child for bash history logging consumption*/
+ con_pid = make_consumer_process ();
+#endif
}
#if !defined (ONESHOT)
@@ -757,6 +781,13 @@ main (argc, argv, env)
/* Read commands until exit condition. */
reader_loop ();
+
+#if defined (SYSLOG_HISTORY)
+ if (interactive_shell && con_pid > 0) {
+ kill(con_pid, SIGKILL);
+ }
+#endif
+
exit_shell (last_command_exit_value);
}
@@ -1619,6 +1650,86 @@ set_shell_name (argv0)
shell_name = PROGRAM;
}
+
+#if defined (SYSLOG_HISTORY)
+#define SYSLOG_MAXLEN 1200
+
+/* Fork child process for bash history logging, handling errors.
+ Returns the pid of the newly made child in parent process context
+ and will not return in child process context. */
+static pid_t
+make_consumer_process ()
+{
+ pid_t pid;
+
+ if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0, cmdline_hist_sock) == -1)
+ {
+ return -1;
+ }
+
+
+ pid = fork ();
+ if (pid < 0)
+ {
+ return -1;
+ }
+
+ if (pid == 0)
+ {
+ int ret;
+ char *buffer;
+ int rcvbuf_size;
+ socklen_t optlen = sizeof(rcvbuf_size);
+
+#if defined (BUFFERED_INPUT)
+ unset_bash_input (0);
+#endif /* BUFFERED_INPUT */
+
+ default_tty_job_signals ();
+
+ close(cmdline_hist_sock[0]);
+
+ ret = getsockopt(cmdline_hist_sock[1], SOL_SOCKET, SO_RCVBUF, &rcvbuf_size, &optlen);
+ if (ret < 0)
+ {
+ rcvbuf_size = SYSLOG_MAXLEN;
+ }
+
+ buffer = (char *) malloc(rcvbuf_size);
+ if (buffer == NULL)
+ {
+ return -1;
+ }
+
+ do {
+ ret = recv(cmdline_hist_sock[1], buffer, rcvbuf_size, 0);
+
+ if (ret == -1 && errno == EINTR)
+ {
+ continue;
+ }
+ else if (ret < 0)
+ {
+ break;
+ }
+
+ buffer[ret] = '\0';
+
+ /*syslog this bash command line*/
+ syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY: PID=%d UID=%d %s",
+ getpid(), current_user.uid, buffer);
+ } while (1);
+
+ }
+ else
+ {
+ /* In the parent. */
+ close(cmdline_hist_sock[1]);
+ }
+ return (pid);
+}
+#endif /*SYSLOG_HISTORY*/
+
static void
init_interactive ()
{
--
1.9.1
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