[opensuse-support] Bash script question
Hi list, while not realy OS related, here's an issue that twists my mind: I have modified some script I found (was pointed to via some article...) to generate a list of processes that use swap, and how much. It's attached below. The issue is line 23, the end of the for loop. If I omit piping the output through the sort command I get an unsorted list, and a correct OVERALL sum. If I use the pipe, last output will be Overall swap used: 0 WTF!? OVERALL is nicely added up in the loop, I can do echos/prints and see how it increases. After the pipe, it's zero again. I tried the 'set -x', but that didn't give me a clue what is happening there. Is that really expected behavior? What am I doing wrong? Thanks for any insight! And here's the script: #!/bin/bash # # Get swap usage for all running processes if [ $UID -ne 0 ]; then printf "\a\nNot running as root - not all processes will be shown!\n\n" fi #set -x declare -i SUM=0 declare -i -g OVERALL=0 for DIR in /proc/[1-9]*; do PID=${DIR##*/} PROGNAME=$(ps -p $PID -o comm --no-headers) for SWAP in $(grep Swap $DIR/smaps 2>/dev/null|awk '{print $2}'); do let SUM=$SUM+$SWAP done if [ $SUM -gt 0 ]; then printf "PID=%6d\tSwap used: %8d\t(%s)\n" $PID $SUM $PROGNAME OVERALL=$[OVERALL+$SUM] SUM=0 fi done | sort -g -k 5 echo "Overall swap used: $OVERALL" #set +x -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
W dniu 29.11.2019 o 15:57, Peter Suetterlin pisze:
This might be helpful: https://wiki.bash-hackers.org/scripting/processtree#bash_playing_with_pipes
Adam Mizerski wrote:
This might be helpful: https://wiki.bash-hackers.org/scripting/processtree#bash_playing_with_pipes
Thanks, I'll definitely go through that! -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
Andrei Borzenkov wrote:
Yes, I assumed that, therefore tried the 'declare -g' to make it global, but didn't help either :( Guess I'd have to save output in a list variable instead, then and sort it afte the loop... -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
30.11.2019 16:21, Peter Suetterlin пишет:
You can also use another shell (zsh starts right hand side in subprocess so does not have this issue). Zsh is sufficiently compatible with bash to require minimal changes if any. -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
Andrei Borzenkov wrote:
Thanks for the tip. It indeed just runs without complaints, but also produces the zero output :o I'm doing it poor man's way now - using a temporary file :P -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 02/12/2019 14.22, Peter Suetterlin wrote:
I do that often :-) Why not an array in bash? declare -a FILENAMES #filling it NUMEROFICHEROS=0 while read FILES ; do FILENAMES[$NUMEROFICHEROS]="$FILES" NUMEROFICHEROS=`expr $NUMEROFICHEROS + 1` done < $1 #using it for((i=0; i<$NUMEROFICHEROS; i++)) do echo $i - ${FILENAMES[$i]} done - -- Cheers / Saludos, Carlos E. R. (from 15.1 x86_64 at Telcontar) -----BEGIN PGP SIGNATURE----- iF0EARECAB0WIQQZEb51mJKK1KpcU/W1MxgcbY1H1QUCXeUSXQAKCRC1MxgcbY1H 1cz8AJ4rdiGMm8i6TmbOCv2XDAxGckmkywCff20HIm0A2HfREfymOwB6JOy7+mc= =s9wW -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
Carlos E. R. wrote:
Called pragmatism, I guess ;^>
Why not an array in bash?
Yes, had mentioned it before, and had tried it, too. But I had issues with formated printout. Likely user error :P Will give it a try again, so thanks for the inspirational code :) -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 03/12/2019 11.49, Peter Suetterlin wrote:
That code was initially a text file ;-) But I needed faster process, and wanted to learn arrays. I really needed a two dimensional array; instead I used two arrays. I don't remember if they exist but looked too complicated. - -- Cheers / Saludos, Carlos E. R. (from 15.1 x86_64 at Telcontar) -----BEGIN PGP SIGNATURE----- iF0EARECAB0WIQQZEb51mJKK1KpcU/W1MxgcbY1H1QUCXeZMhwAKCRC1MxgcbY1H 1QKbAKCPCnSE10ySSSyV2t8zfHL9gP4btQCeMXx3HGvs7Y4KpvDv9b38rKrYU+k= =Mpz7 -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Friday, 2019-11-29 at 14:57 -0000, Peter Suetterlin wrote:
I use top for that. First I configure it to add a column for swap, and save that change. Then I tell it to sort by swap usage ( don't save this). Example: top - 22:53:46 up 4 days, 3:46, 2 users, load average: 1,61, 1,83, 1,83 Tasks: 530 total, 1 running, 528 sleeping, 0 stopped, 1 zombie %Cpu(s): 1,4 us, 0,5 sy, 0,0 ni, 78,8 id, 19,3 wa, 0,0 hi, 0,0 si, 0,0 st KiB Mem : 8161260 total, 2426500 free, 4112584 used, 1622176 buff/cache KiB Swap: 25165820 total, 17201572 free, 7964248 used. 3453060 avail Mem . . . . . . . . . . . . . . . . . . . . . ^^^^^^^^^^^^^ that's the total swap usage PID USER PR NI VIRT RES SHR SWAP S %CPU %MEM TIME+ COMMAND 19744 cer 20 0 3130140 43480 6024 1,517g S 0,000 0,533 18:25.82 shotwell 5651 vscan 20 0 1036832 28220 3800 775904 S 0,000 0,346 6:30.14 clamd . . . . . . . . . . . . . . . . . . . . . . .^^^^^^ and this column shows swap usage per program 5048 cer 39 19 3024756 18592 6924 715128 S 0,000 0,228 45:50.73 tracker-extract 31990 cer 20 0 1923896 97836 14592 332292 S 0,000 1,199 3:28.64 nautilus 5528 cer 20 0 4644044 992,5m 70292 272456 S 0,000 12,45 118:52.81 thunderbird-bin 5092 cer 39 19 1419384 34728 6896 199780 S 0,000 0,426 4:34.88 tracker-miner-f 20333 astro 20 0 1821748 28724 8720 186340 S 0,000 0,352 3:08.35 thunar 2275 named 20 0 538496 19708 4380 185840 S 0,000 0,241 0:35.89 named 1333 astro 20 0 1993100 42052 8084 184756 S 0,000 0,515 6:49.56 shotwell 5854 cer 20 0 4427732 514996 184988 142424 S 0,595 6,310 86:28.27 firefox 6055 cer 20 0 3169144 152376 47676 127496 S 0,298 1,867 98:05.94 Web Content 18028 cer 20 0 3989976 52368 420 114704 S 0,000 0,642 1:28.04 java 4049 root 20 0 709380 146688 115732 105080 S 0,893 1,797 44:44.71 X 14087 cer 20 0 3229840 153236 42480 100252 S 0,000 1,878 12:42.52 Web Content 6251 cer 20 0 3100408 77560 18884 94316 S 0,298 0,950 20:09.69 Web Content 19619 cer 20 0 6664632 479476 97480 92448 S 0,000 5,875 10:49.17 soffice.bin 3927 root 20 0 213912 1788 1276 85504 S 0,000 0,022 0:00.24 spamd child 3928 root 20 0 213912 1960 1384 85440 S 0,000 0,024 0:00.27 spamd child 3923 root 20 0 213912 6036 4532 84512 S 0,000 0,074 0:31.12 spamd 5954 cer 20 0 3400044 306312 92404 78460 S 0,000 3,753 32:19.02 Web Content 2253 mysql 20 0 1885356 1228 1228 77824 S 0,298 0,015 1:10.61 mysqld 5989 cer 20 0 3271920 157156 32576 76188 S 0,000 1,926 14:26.81 Web Content 6007 cer 20 0 3201780 237676 82476 68952 S 0,298 2,912 9:02.81 Web Content ... - -- Cheers, Carlos E. R. (from openSUSE 15.1 x86_64 at Telcontar) -----BEGIN PGP SIGNATURE----- iHoEARECADoWIQQZEb51mJKK1KpcU/W1MxgcbY1H1QUCXeGV0hwccm9iaW4ubGlz dGFzQHRlbGVmb25pY2EubmV0AAoJELUzGBxtjUfVeo8An0UPQvDGLk3yk/bTvMyX fRnb/GOFAJ9vsWXYCIRYHabifBJc8u5vzzIQQA== =3tI4 -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
W dniu 29.11.2019 o 15:57, Peter Suetterlin pisze:
This might be helpful: https://wiki.bash-hackers.org/scripting/processtree#bash_playing_with_pipes
Adam Mizerski wrote:
This might be helpful: https://wiki.bash-hackers.org/scripting/processtree#bash_playing_with_pipes
Thanks, I'll definitely go through that! -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
Andrei Borzenkov wrote:
Yes, I assumed that, therefore tried the 'declare -g' to make it global, but didn't help either :( Guess I'd have to save output in a list variable instead, then and sort it afte the loop... -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
30.11.2019 16:21, Peter Suetterlin пишет:
You can also use another shell (zsh starts right hand side in subprocess so does not have this issue). Zsh is sufficiently compatible with bash to require minimal changes if any. -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
Andrei Borzenkov wrote:
Thanks for the tip. It indeed just runs without complaints, but also produces the zero output :o I'm doing it poor man's way now - using a temporary file :P -- To unsubscribe, e-mail: opensuse-support+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-support+owner@opensuse.org
participants (4)
-
Adam Mizerski -
Andrei Borzenkov -
Carlos E. R. -
Peter Suetterlin