linux - Bash: Read commands from file -



linux - Bash: Read commands from file -

i'm using minimal netinstall image of debian. here script start user processes , daemons @ first login. reads file consisting of commands line line, checks if running , launches them, if not:

#!/bin/bash ## script reads list of user startup daemons , launches them after first login stat=`who | grep "$user" | wc -l` ## login count if [ "$stat" -eq 1 ] ; ## if login shell while ifs=' ' read line ## first effort separate fields fails cmd=`echo "$line" | grep -v ^\#` ## utilize non comment lines if [ -n "$cmd" ] ; eval set "$cmd" ## actual field separation appid=$(pgrep "$1")&& ## check if process $1 of $cmd active , launch if not (echo "$1 active "$appid) || ("$@" 1>/dev/null&& echo "started $1 $(pgrep "$1")") fi done < ~/.scripts/daemons echo "start-daemons: finished" else echo "start-daemons: not login shell" fi

the file of commands ~/.scripts/daemons looks following:

## list of processes / daemons start @ user login ## <command> <argument1> <argument2> .. mpd pulseaudio -d gpg-agent --daemon --enable-ssh-support --write-env-file /tmp/.gpg-agent-info

the script works mpd. problem is, though, lines consisting of command , (multiple) options (and thus, spaces) not splitted fields. setting field separator ifs ' ' makes no difference, find strange. matter in case? give thanks you!

edit: suggested alvits, field separation through evaluating set $line within while loop, provides easy workaround. why read line no separation in first place?

i think should checking "pgrep pulseaudio". is, utilize process/daemon name rather giving process/daemon name along options. don't have machine can test now. can taking first field each line(that process/daemon name). sec one. 1 more thing can seek "-f" alternative of pgrep. seek n allow me know

linux bash sed grep

Comments

Post a Comment

Popular posts from this blog

Delphi change the assembly code of a running process -

Delphi change the assembly code of a running process - i'm trying alter address 00741fa5 has push test.009e721c . alter push test.009e71c8 . procedure callback; asm force $9e71c8 end; procedure tform2.btn1click(sender: tobject); var ppid :dword; pprocess : cardinal; begin getwindowthreadprocessid(findwindow(nil,pchar('test')), @ppid); pprocess := openprocess(process_all_access, false, ppid); injectasm(pprocess, $741fa5, 10, integer(@callback), 0); end; here injectasm function (with error checking) function injectasm(process: longword; injectaddress, injectsize, codeaddress, codesize : integer): pointer; var csize, rsize : integer; replaced : array of byte; jmp : array [0..4] of byte; jmpaddress : integer; nopv : byte; : integer; nbr: ulong_ptr; begin //injectsize must equal or greater 5, because need space our //(far) jmp wwxxyyzz instruction //if there's no space, inject in place of few instructions if injectsize ...
Read more

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) -

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) - hello have problem hibernate , jackson. have 2 pojos @entity @table(name = "users") public class user implements serializable { static final long serialversionuid = 4235637833262722256l; @id @generatedvalue private int id; @column(name = "creation_date") private date creationdate; @column(name = "first_name") private string firstname; @column(name = "last_name") private string lastname; @version @column(name = "version") private int version; @column(name = "e_mail") private string email; @column(name = "enabled") private boolean enabled; @column(name = "login") private string login; @column(name = "password") private string password; @jsonmanagedreference("role") @onetomany(mappedby = "user", cascade = cascadetype.all,fetch = fetchtyp...
Read more

C++ 11 "class" keyword -

C++ 11 "class" keyword - i've started using c++ 11 little bit more , have few questions on special uses of class keyword. know it's used declare class, there's 2 instances have seen don't understand: method<class t>(); and class class_name *var; why precede typename keyword class in first example, , keyword pointer in sec example? that known elaborated type specifier , necessary when class name "shadowed" or "hidden" , need explicit. class t { }; // love of god don't t t; t t2; if compiler smart, give these warnings: main.cpp:15:5: error: must utilize 'class' tag refer type 't' in scope t t2; ^ class main.cpp:14:7: note: class 't' hidden non-type declaration of 't' here t t; ^ if class not defined, deed forwards declaration. for example: template <typename t> void method() { using type = typename t::value_type; } method...
Read more