Bug#25144379 MYSQLD PROCESS DOES NOT INCLUDE FULL PATH WHEN STARTING MYSQL SERVER

Fix of Bug#25088048 caused paths to be relative, not absolute, this
proved to be problematic.

Fix is to still ignore current working directory, however switch to
using full path of basedir, which is set to parent directory of bin/
directory where mysqld_safe is located.

References to legacy tool mysql_print_defaults are removed, only
my_print_defaults is used these days.

This will also fix:
  Bug#11745176 (11192) MYSQLD_SAFE ONLY EVALUATES --DEFAULTS-FILE OPTION WHEN IT IS THE FIRST OP
  Bug#23013510 (80866) MYSQLD_SAFE SHOULD NOT SEARCH $MY_BASEDIR_VERSION/VAR AS DATADIR
  Bug#25244898 (84173) MYSQLD_SAFE --NO-DEFAULTS & SILENTLY DOES NOT WORK ANY MORE
  Bug#25261472 (84219) INITSCRIPT ERRORS WHEN LAUCHING MYSQLD_SAFE IN NON DEFAULT BASEDIR
  Bug#25319392 (84263) MYSQL.SERVER (MYSQL SERVER STARTUP SCRIPT) CAN NOT WORK,AND EXPORT SOME ERROR.
  Bug#25319457         MYSQLD_SAFE MIGHT FAIL IF $DATADIR HAS TRAILING /
  Bug#25341981         MYSQLD_SAFE ASSUMES INCORRECT BASEDIR WHEN EXECUTED WITH ABSOLUTE PATH
  Bug#25356221 (84427) MYSQLD_SAFE FAILS TO START WHEN USING A FIFO FOR LOG-ERROR (REGRESSION)
  Bug#25365194 (84447) MYSQLD_SAFE DOESN'T CHECK EXISTENCE OF GIVEN BASEDIR PARAMETER
  Bug#25377815         ERRORS WHILE STARTING MYSQLD_SAFE WITH SYM LINK ENABLED

Author: trosten

scripts/mysqld_safe.sh

@@ -64,9 +64,12 @@ esac
 usage () {
         cat <<EOF
 Usage: $0 [OPTIONS]
+ The following options may be given as the first argument:
   --no-defaults              Don't read the system defaults file
   --defaults-file=FILE       Use the specified defaults file
   --defaults-extra-file=FILE Also use defaults from the specified file
+
+ Other options:
   --ledir=DIRECTORY          Look for mysqld in the specified directory
   --open-files-limit=LIMIT   Limit the number of open files
   --core-file-size=LIMIT     Limit core files to the specified size
@@ -205,7 +208,12 @@ parse_arguments() {
     case "$arg" in
       # these get passed explicitly to mysqld
       --basedir=*) MY_BASEDIR_VERSION="$val" ;;
-      --datadir=*) DATADIR="$val" ;;
+      --datadir=*)
+        case $val in
+          /) DATADIR=$val ;;
+          *) DATADIR="`echo $val | sed 's;/*$;;'`" ;;
+        esac
+        ;;
       --pid-file=*) pid_file="$val" ;;
       --plugin-dir=*) PLUGIN_DIR="$val" ;;
       --user=*) user="$val"; SET_USER=1 ;;
@@ -387,63 +395,70 @@ set_malloc_lib() {
   add_mysqld_ld_preload "$malloc_lib"
 }
 
+find_basedir_from_cmdline () {
+  for arg in "$@"; do
+    case $arg in
+      --basedir=*)
+        MY_BASEDIR_VERSION="`echo "$arg" | sed -e 's;^--[^=]*=;;'`"
+        # Convert to full path
+        cd "$MY_BASEDIR_VERSION"
+        if [ $? -ne 0 ] ; then
+          log_error "--basedir set to '$MY_BASEDIR_VERSION', however could not access directory"
+          exit 1
+        fi
+        MY_BASEDIR_VERSION="`pwd`"
+        ;;
+    esac
+  done
+}
 
 #
 # First, try to find BASEDIR and ledir (where mysqld is)
 #
 
-if echo '@pkgdatadir@' | grep '^@prefix@' > /dev/null
-then
-  relpkgdata=`echo '@pkgdatadir@' | sed -e 's,^@prefix@,,' -e 's,^/,,' -e 's,^,./,'`
+oldpwd="`pwd`"
+
+# Args not parsed yet, check if --basedir was given on command line
+find_basedir_from_cmdline "$@"
+
+# --basedir is already overridden on command line
+if test -n "$MY_BASEDIR_VERSION" -a -d "$MY_BASEDIR_VERSION" ; then
+  # Search for mysqld and set ledir
+  for dir in @INSTALL_SBINDIR@ libexec sbin bin ; do
+    if test -x "$MY_BASEDIR_VERSION/$dir/mysqld" ; then
+      ledir="$MY_BASEDIR_VERSION/$dir"
+      break
+    fi
+  done
+
 else
-  # pkgdatadir is not relative to prefix
-  relpkgdata='@pkgdatadir@'
-fi
+  # Basedir should be parent dir of bindir, unless some non-standard
+  # layout is used
 
-case "$0" in
-  /*)
-  MY_PWD='@prefix@'
-  ;;
-  *)
-  MY_PWD=`dirname $0`
-  MY_PWD=`dirname $MY_PWD`
-  ;;
-esac
-# Check for the directories we would expect from a binary release install
-if test -n "$MY_BASEDIR_VERSION" -a -d "$MY_BASEDIR_VERSION"
-then
-  # BASEDIR is already overridden on command line.  Do not re-set.
+  cd "`dirname $0`"
+  if [ -h "$0" ] ; then
+    realpath="`ls -l  "$0" | awk '{print $NF}'`"
+    cd "`dirname "$realpath"`"
+  fi
+  cd ..
+  MY_PWD="`pwd`"
+
+  # Search for mysqld and set ledir and BASEDIR
+  for dir in @INSTALL_SBINDIR@ libexec sbin bin ; do
+    if test -x "$MY_PWD/$dir/mysqld" ; then
+      MY_BASEDIR_VERSION="$MY_PWD"
+      ledir="$MY_BASEDIR_VERSION/$dir"
+      break
+    fi
+  done
 
-  # Use BASEDIR to discover le.
-  if test -x "$MY_BASEDIR_VERSION/libexec/mysqld"
-  then
-    ledir="$MY_BASEDIR_VERSION/libexec"
-  elif test -x "$MY_BASEDIR_VERSION/sbin/mysqld"
-  then
-    ledir="$MY_BASEDIR_VERSION/sbin"
-  else
-    ledir="$MY_BASEDIR_VERSION/bin"
+  # If we still didn't find anything, use the compiled-in defaults
+  if test -z "$MY_BASEDIR_VERSION" ; then
+    MY_BASEDIR_VERSION='@prefix@'
+    ledir='@libexecdir@'
   fi
-elif test -f "$relpkgdata"/english/errmsg.sys -a -x "$MY_PWD/bin/mysqld"
-then
-  MY_BASEDIR_VERSION="$MY_PWD"		# Where bin, share and data are
-  ledir="$MY_PWD/bin"			# Where mysqld is
-# Check for the directories we would expect from a source install
-elif test -f "$relpkgdata"/english/errmsg.sys -a -x "$MY_PWD/libexec/mysqld"
-then
-  MY_BASEDIR_VERSION="$MY_PWD"		# Where libexec, share and var are
-  ledir="$MY_PWD/libexec"		# Where mysqld is
-elif test -f "$relpkgdata"/english/errmsg.sys -a -x "$MY_PWD/sbin/mysqld"
-then
-  MY_BASEDIR_VERSION="$MY_PWD"		# Where sbin, share and var are
-  ledir="$MY_PWD/sbin"			# Where mysqld is
-# Since we didn't find anything, used the compiled-in defaults
-else
-  MY_BASEDIR_VERSION='@prefix@'
-  ledir='@libexecdir@'
 fi
 
-
 #
 # Second, try to find the data directory
 #
@@ -456,10 +471,6 @@ then
   then
     defaults="--defaults-extra-file=$DATADIR/my.cnf"
   fi
-# Next try where the source installs put it
-elif test -d $MY_BASEDIR_VERSION/var/mysql
-then
-  DATADIR=$MY_BASEDIR_VERSION/var
 # Or just give up and use our compiled-in default
 else
   DATADIR=@localstatedir@
@@ -490,21 +501,10 @@ export MYSQL_HOME
 
 # Get first arguments from the my.cnf file, groups [mysqld] and [mysqld_safe]
 # and then merge with the command line arguments
-if test -x "$MY_BASEDIR_VERSION/bin/my_print_defaults"
-then
+if test -x "$MY_BASEDIR_VERSION/bin/my_print_defaults" ; then
   print_defaults="$MY_BASEDIR_VERSION/bin/my_print_defaults"
-elif test -x `dirname $0`/my_print_defaults
-then
-  print_defaults="`dirname $0`/my_print_defaults"
-elif test -x ./bin/my_print_defaults
-then
-  print_defaults="./bin/my_print_defaults"
-elif test -x @bindir@/my_print_defaults
-then
+elif test -x "@bindir@/my_print_defaults" ; then
   print_defaults="@bindir@/my_print_defaults"
-elif test -x @bindir@/mysql_print_defaults
-then
-  print_defaults="@bindir@/mysql_print_defaults"
 else
   print_defaults="my_print_defaults"
 fi
@@ -515,6 +515,8 @@ append_arg_to_args () {
 
 args=
 
+cd "$oldpwd"
+
 SET_USER=2
 parse_arguments `$print_defaults $defaults --loose-verbose mysqld server`
 if test $SET_USER -eq 2
@@ -613,7 +615,7 @@ fi
 logdir=`dirname "$err_log"`
 # Change the err log to the right user, if possible and it is in use
 if [ $logging = "file" -o $logging = "both" ]; then
-  if [ ! -f "$err_log" -a ! -h "$err_log" ]; then
+  if [ ! -e "$err_log" -a ! -h "$err_log" ]; then
     if test -w / -o "$USER" = "root"; then
       case $logdir in
         /var/log)
@@ -633,7 +635,7 @@ if [ $logging = "file" -o $logging = "both" ]; then
     fi
   fi
 
-  if [ -f "$err_log" ]; then        # Log to err_log file
+  if [ -f "$err_log" -o -p "$err_log" ]; then        # Log to err_log file
     log_notice "Logging to '$err_log'."
   elif [ "x$user" = "xroot" ]; then # running as root, mysqld can create log file; continue
     echo "Logging to '$err_log'." >&2

support-files/mysql.server.sh

@@ -200,15 +200,8 @@ wait_for_pid () {
 
 # Get arguments from the my.cnf file,
 # the only group, which is read from now on is [mysqld]
-if test -x ./bin/my_print_defaults
-then
-  print_defaults="./bin/my_print_defaults"
-elif test -x $bindir/my_print_defaults
-then
+if test -x "$bindir/my_print_defaults";  then
   print_defaults="$bindir/my_print_defaults"
-elif test -x $bindir/mysql_print_defaults
-then
-  print_defaults="$bindir/mysql_print_defaults"
 else
   # Try to find basedir in /etc/my.cnf
   conf=/etc/my.cnf
@@ -225,11 +218,6 @@ else
         print_defaults="$d/bin/my_print_defaults"
         break
       fi
-      if test -x "$d/bin/mysql_print_defaults"
-      then
-        print_defaults="$d/bin/mysql_print_defaults"
-        break
-      fi
     done
   fi