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Resume from last failed command

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# 15  
Old 09-30-2014
If you want to do it without a makefile:

Code:
#!/bin/sh

if [ "$#" -gt 0 ]
then
        X="$1"
elif [ -f lastfile ]
then
        read X < lastfile
fi

[ -z "$X" ] && X=1

R=1

while [ "$R" -eq 1 ]
do
        case "$X" in
        1)      command1 ;;
        2)      command2 ;;
        3)      command3 ;;
        4)      command4 ;;
        5)      command5 ;;
        *)      R=0 ;;
        esac

        if [ "$?" -ne 0 ]
        then
                echo "Error in loop $X" >&2
                exit 1
        fi

        let X=X+1
        # Save last-succeeded-operation + 1
        echo $X > lastfile
done

echo "Completed all loops, removing flag file"
rm -f lastfile

Then you could do ./script and it would remember where it left off, or ./script 2 to force it.
Last edited by Corona688; 09-30-2014 at 03:21 PM..
These 2 Users Gave Thanks to Corona688 For This Post:
rprasad sea
# 16  
Old 09-30-2014
Hi,

OK, I can't let you have the whole script - but below is a typical section from the script. Please bear in mind that this is a singlr section of the script and that there are many such sections.

Code:
# ----------------------------------------------------------------------------------------------------
# check filesystems if not exists then create it"
# ----------------------------------------------------------------------------------------------------
#
#   STEPTOINFO[  4 ]=0 # check filesystems if not exists then create it
    STEPCOUNT=4
    if [ ${STEPTOINFO[$STEPCOUNT]} -ne 0 ]; then
#   {
        printf "$STEPCOUNT" >  "$SAVE_LAST_BREAK"    # save actally position
        printf "$STEPCOUNT; " >> "$SAVE_LAST_ACTIVITY"
#
        if [ "$GLOBAL_ZONE" = "$TRUE" ]; then
#       {
# ----------------------------------------------------------------------------------------------------
#
            ANZINFORMATION=$((ANZINFORMATION + 1))
            INSTALLINFORMATION[$ANZINFORMATION]="SECTION -  %2d : ${SECTION_INFO[$STEPCOUNT]}"
#
            showheader "${INSTALLINFORMATION[$ANZINFORMATION]}" "$STEPCOUNT" "$BACKGROUND"
#
            ERRORFOUND=0
            ERRORINFORMATION[$ANZINFORMATION]="Perfect"
#
# ----------------------------------------------------------------------------------------------------
# needed Filesystems:
#
            ZFS_RPOOL_FILESYS="rpool/UC4                                                            \
                               rpool/export rpool/export/home                                       \
                               rpool/local  rpool/local/Tivoli rpool/local/bmc rpool/local/oracle   \
                               rpool/zzz    rpool/zzz/core                                          \
                               rpool/oracle                                                         \
                               rpool/TAD4D"
# save this info in an array
#
            i=-1
            for ZFS_RP_FS in $ZFS_RPOOL_FILESYS
            do
                i=$((i + 1)); ZFS_RPOOLFS[$i]=$ZFS_RP_FS
            done
#
# ----------------------------------------------------------------------------------------------------
# needed Mountpoint for zfs filesystems:
#
            i=-1
            ZFS_FILESYSTEMS="/UC4                                                                \
                             /export     /export/home                                            \
                             /usr/local  /usr/local/Tivoli  /usr/local/bmc /usr/local/oracle     \
                             /zzz        /zzz/core                                               \
                             /oracle                                                             \
                             /opt/TAD4D"
# save this info in an array
#
            i=-1
            for ZFS_FS in $ZFS_FILESYSTEMS
            do

                i=$((i + 1)); ZFS_RPOOLFS[$i]=$ZFS_RP_FS
            done
#
# ----------------------------------------------------------------------------------------------------
# needed Mountpoint for zfs filesystems:
#
            i=-1
            ZFS_FILESYSTEMS="/UC4                                                                \
                             /export     /export/home                                            \
                             /usr/local  /usr/local/Tivoli  /usr/local/bmc /usr/local/oracle     \
                             /zzz        /zzz/core                                               \
                             /oracle                                                             \
                             /opt/TAD4D"
# save this info in an array
#
            i=-1
            for ZFS_FS in $ZFS_FILESYSTEMS
            do
                i=$((i + 1)); ZFS_FILESYS[$i]=$ZFS_FS
            done
#
# ----------------------------------------------------------------------------------------------------
# needed quotas for zfs filesystems:
#
            ZFS_FILESYS_QUOTAS="250M                                                              \
                                  3G          2G                                                  \
                                  3G          262M               520M            520M             \
                                  2G          1G                                                  \
                                 10G                                                              \
                                250M"
# save this info in an array
#
            i=-1
            for ZFS_FSQ in $ZFS_FILESYS_QUOTAS
            do
                i=$((i + 1)); ZFS_FSQUOTAS[$i]=$ZFS_FSQ
            done
#
# ----------------------------------------------------------------------------------------------------
#
            i=-1
            while [ $i -lt $(( ${#ZFS_FILESYS[*]} - 1)) ]
            do
#           {
                i=$((i + 1))
                typeset -L20 TMP_ZFS_RPOOLFS
                typeset -L20 TMP_ZFS_FILESYS
                TMP_ZFS_RPOOLFS="'${ZFS_RPOOLFS[$i]}'"
                TMP_ZFS_FILESYS="'${ZFS_FILESYS[$i]}'"
#
                /usr/sbin/zfs list | grep "${ZFS_RPOOLFS[$i]}" > /dev/null 2>&1
                RC=$?
                if [ $RC -eq 0 ]; then
#               {
#           {
                i=$((i + 1))
                typeset -L20 TMP_ZFS_RPOOLFS
                typeset -L20 TMP_ZFS_FILESYS
                TMP_ZFS_RPOOLFS="'${ZFS_RPOOLFS[$i]}'"
                TMP_ZFS_FILESYS="'${ZFS_FILESYS[$i]}'"
#
                /usr/sbin/zfs list | grep "${ZFS_RPOOLFS[$i]}" > /dev/null 2>&1
                RC=$?
                if [ $RC -eq 0 ]; then
#               {
                    if [ -d "${ZFS_FILESYS[$i]}" ]; then
#                   {
# >> zfs rpool/fs is available !!!
# >> directory    is available !!!
                        showmessages "...     NOTE: $TMP_ZFS_RPOOLFS and $TMP_ZFS_FILESYS exists" "Perfect" "$BACKGROUND"
#                   }
                    else
#                   {
                        showmessages "...     NOTE: $TMP_ZFS_FILESYS not exists" "Faulty" "$BACKGROUND"
                        ERRORFOUND=1
#                   }
                    fi
#               }
                else
#               {
# >> zfs rpool/fs is NOT available !!!
                    showmessages "...     NOTE: $TMP_ZFS_RPOOLFS not exists" "Faulty" "$BACKGROUND"
                    if [ ! -d "${ZFS_FILESYS[$i]}" ]; then
#                   {
# >> directory is NOT available !!!"
                        showmessages "...     NOTE: $TMP_ZFS_FILESYS not exists" "Faulty" "$BACKGROUND"
                        ERRORFOUND=1
#                   }
                    else
#                   {
                        showmessages "...     NOTE: $TMP_ZFS_FILESYS is a directory not a ZFS-Filesystem from $TMP_ZFS_RPOOLFS" \
                                     "Faulty"                                                                                   \
                                     "$BACKGROUND"
                        ERRORFOUND=1
#                   }
                    fi
#               }
                fi
#           }
            done
#
# --------------------------------------------------------------------------------------------------------
#
        if [ $ERRORFOUND -ne 0 ]; then
            GLOBAL_ERROR=-1
            ERRORINFORMATION[$ANZINFORMATION]="Faulty"
        fi
        fi
#
# ----------------------------------------------------------------------------------------------------
#
            if [ $RETURNNEEDED -eq 0 ]; then
                printf "\nenter <RETURN> to continue : "; read FORWARD
            fi
#       }
        fi
#   }
    fi

You should be able to see how the checking is done in each section from this.

Regards

Dave
# 17  
Old 09-30-2014
@ Corona688: there's a missing closing quote if [ "$? -ne 0 ]
But nice one otherwise, i've tried a similar one with just a loop, but since the loop gone through all things, the error was overwritten and not reportet.. i'd had expected seomthing similar for a case statement..
As in, the case got catched and therefor would return true... thx for clearing this wrong assumption Smilie
# 18  
Old 09-30-2014
Quote:
Originally Posted by sea
@ Corona688: there's a missing closing quote if [ "$? -ne 0 ]
Thanks, fixed.

Quote:
But nice one otherwise, i've tried a similar one with just a loop, but since the loop gone through all things, the error was overwritten and not reportet.. i'd had expected seomthing similar for a case statement..
The trick is to save the next number after every success; otherwise, don't bother saving. Otherwise, you will be off-by-one...

Also, don't put anything but the program line in the cases, one per case. If you put anything else, it will pollute the value of $?. If you want any logging/etc, put it above the case or after the save.
# 19  
Old 09-30-2014
Hi,

The script, will save the step count at the beginning of each step. When you run the script a second or subsequent time, the script will check the section to start at - as it writes the count at the beginning of each section. The script will start at the section that has failed.

Regards

Dave
# 20  
Old 10-10-2014
Wow, this worked. Thank you !!
Quote:
Originally Posted by Corona688
If you want to do it without a makefile:

Code:
#!/bin/sh

if [ "$#" -gt 0 ]
then
        X="$1"
elif [ -f lastfile ]
then
        read X < lastfile
fi

[ -z "$X" ] && X=1

R=1

while [ "$R" -eq 1 ]
do
        case "$X" in
        1)      command1 ;;
        2)      command2 ;;
        3)      command3 ;;
        4)      command4 ;;
        5)      command5 ;;
        *)      R=0 ;;
        esac

        if [ "$?" -ne 0 ]
        then
                echo "Error in loop $X" >&2
                exit 1
        fi

        let X=X+1
        # Save last-succeeded-operation + 1
        echo $X > lastfile
done

echo "Completed all loops, removing flag file"
rm -f lastfile

Then you could do ./script and it would remember where it left off, or ./script 2 to force it.
This User Gave Thanks to rprasad For This Post:
Corona688
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