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78 lines
2.2 KiB
78 lines
2.2 KiB
From 70ed51ccc2e8e6c4976d422af960e4232210fb99 Mon Sep 17 00:00:00 2001 |
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From: Karel Zak <kzak@redhat.com> |
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Date: Mon, 16 Oct 2017 13:31:47 +0200 |
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Subject: [PATCH 134/135] logger: do not rely only getlogin(3) telling who ran |
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the command |
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The getlogin(3) is known not to always work, and when that happens it |
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is reasonable to try determine user of name by looking process owner |
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and passwd information. |
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Upstream: http://github.com/karelzak/util-linux/commit/019b97024fde3f07eaf541eef990762483369a11 |
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Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1336432 |
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Signed-off-by: Karel Zak <kzak@redhat.com> |
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--- |
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misc-utils/logger.c | 25 ++++++++++++++++--------- |
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1 file changed, 16 insertions(+), 9 deletions(-) |
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diff --git a/misc-utils/logger.c b/misc-utils/logger.c |
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index dfda01866..c1cec45e8 100644 |
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--- a/misc-utils/logger.c |
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+++ b/misc-utils/logger.c |
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@@ -49,6 +49,8 @@ |
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#include <arpa/inet.h> |
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#include <netdb.h> |
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#include <getopt.h> |
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+#include <sys/types.h> |
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+#include <pwd.h> |
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#include "c.h" |
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#include "closestream.h" |
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@@ -183,9 +185,20 @@ inet_socket(const char *servername, const char *port, const int socket_type) |
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return fd; |
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} |
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+static char const *xgetlogin(void) |
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+{ |
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+ char const *cp; |
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+ struct passwd *pw; |
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+ |
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+ if (!(cp = getlogin()) || !*cp) |
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+ cp = (pw = getpwuid(geteuid()))? pw->pw_name : "<someone>"; |
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+ return cp; |
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+} |
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+ |
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static void |
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mysyslog(int fd, int logflags, int pri, char *tag, char *msg) { |
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- char *buf, pid[30], *cp, *tp; |
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+ char *buf, pid[30], *tp; |
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+ const char *cp; |
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time_t now; |
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if (fd > -1) { |
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@@ -193,13 +206,7 @@ mysyslog(int fd, int logflags, int pri, char *tag, char *msg) { |
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snprintf (pid, sizeof(pid), "[%d]", getpid()); |
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else |
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pid[0] = 0; |
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- if (tag) |
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- cp = tag; |
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- else { |
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- cp = getlogin(); |
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- if (!cp) |
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- cp = "<someone>"; |
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- } |
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+ cp = tag ? tag : xgetlogin(); |
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(void)time(&now); |
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tp = ctime(&now)+4; |
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@@ -334,7 +341,7 @@ main(int argc, char **argv) { |
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else if (usock) |
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LogSock = unix_socket(usock, socket_type); |
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else |
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- openlog(tag ? tag : getlogin(), logflags, 0); |
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+ openlog(tag ? tag : xgetlogin(), logflags, 0); |
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buf = xcalloc(1, max_message_size); |
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-- |
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2.13.6
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