• Masatake YAMATO's avatar
    pidof: allow to change a separator put between pids · 73492b18
    Masatake YAMATO authored
    I frequency use pidof command with strace system call tracer.
    strace can trace MULTIPLE processes specified with "-p $PID"
    arguments like:
    
    	  strace -p 1 -p 1030 -p 3043
    
    Sometimes I want to do as following
    
    	  strace -p $(pidof httpd)
    
    However, above command line doesn't work because -p option
    is needed for specifying a pid. pidof uses a whitespace as
    a separator. For passing the output to strace, the separator
    should be replaced with ' -p '.
    
    This maybe not a special to my use case.
    
    This commit introduces -S option that allows a user to specify a
    separator the one wants.
    
        $ ./pidof bash
        ./pidof bash
        24624 18790 12786 11898 11546 10766 7654 5095
        $ ./pidof -S ',' bash
        ./pidof -S ',' bash
        24624,18790,12786,11898,11546,10766,7654,5095
        $ ./pidof -S '-p ' bash
        ./pidof -S '-p ' bash
        24624-p 18790-p 12786-p 11898-p 11546-p 10766-p 7654-p 5095
        $ ./pidof -S ' -p ' bash
        ./pidof -S ' -p ' bash
        24624 -p 18790 -p 12786 -p 11898 -p 11546 -p 10766 -p 7654 -p 5095
        $ strace -p $(./pidof -S ' -p ' bash)
        strace -p $(./pidof -S ' -p ' bash)
        strace: Process 24624 attached
        strace: Process 18790 attached
        strace: Process 12786 attached
        ...
    Signed-off-by: 's avatarMasatake YAMATO <yamato@redhat.com>
    73492b18
pidof.c 8.84 KB