Re: [linux-audio-user] 2.6.15.4, realtime-lsm, jackd -R,

On Wed, Feb 15, 2006 at 09:47:00PM -0500, Ross Vandegrift wrote: Experiment is done. rlimits properly inherit with set_rlimits. Granting RT privileges to any program I run is easy and transparent: 1) I added a line to set_rlimits.conf allowing anyone in the group audio to run my window manager with RT abilities: @audio /usr/local/enlightenment/bin/enlightenment nice=-1 rtprio=80 memlock=67108864 2) I changed my .xsession to run the window manager with set_rlimits: exec /usr/local/bin/set_rlimits -k /usr/local/enlightenment/bin/enlightenment The -k to set_rlimits is an option I added to continue even if realtime privileges cannot be setup. I did this so if I ever take myself out of the audio group, I will still be able to login to my Xsession. Patch is below. It's now just a bit more work to take the patch set_rlimits and edit the system-wide display manager to invoke any users session with set_rlimits. Then, any user can take advantage of this without modifying their config files. diff -ur set_rlimits-1.2.0/set_rlimits.c set_rlimits/set_rlimits.c --- set_rlimits-1.2.0/set_rlimits.c 2005-12-20 06:37:35.000000000 -0500 +++ set_rlimits/set_rlimits.c 2006-02-16 02:04:34.000000000 -0500 @@ -98,6 +98,7 @@ signed int debug = 0; signed int verbose = 0; +signed int cont = 0; /* rlimits for process */ Rlimits rlimits = { @@ -123,6 +124,7 @@ "Available options:\n" " -d Turn on additional debugging output.\n" " -h Display this help message.\n" + " -k Continue running program even if there's an error.\n" " -n[=<nlimit>] Set nice limit to <nlimit>. Values 0 to 39 equate to nice\n" " levels 19 to -20 respectively.\n" " -r[=<priority>] Set realtime priority limit to <priority>. Max available is\n" @@ -216,6 +218,9 @@ debug = 1; break; case 'h': err = -1; break; + case 'k': + cont = 1; + break; case 'v': if (argv[i][2]!=0) err = -1; @@ -632,10 +637,14 @@ return -1; } /* No matching entry - permission denied */ - if (!match) { + if (!match && !cont) { fprintf(stderr,"set_rlimits: no permission to run %s with elevated resource limits\n", *exec_path); return 0; + } else if (!match && cont) { + fprintf(stderr,"set_rlimits: no permission to run %s with elevated resource limits\n", + *exec_path); + fprintf(stderr,"set_rlimits: continuing anyway, as requested...\n"); } if (debug) { -- Ross Vandegrift ross(a)lug.udel.edu "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken the spirit and to confine man in the bonds of Hell." --St. Augustine, De Genesi ad Litteram, Book II, xviii, 37