56 lines
1.7 KiB
Nix
56 lines
1.7 KiB
Nix
{ stdenv, xorgserver }:
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# !!! What does this package do, and does it belong in Nixpkgs?
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stdenv.mkDerivation {
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name = "xlaunch";
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inherit xorgserver;
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buildCommand = "
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cat << EOF > realizeuid.c
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdio.h>
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int main(int argc, char ** argv, char ** envp)
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{
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uid_t a,b,c;
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int i;
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char *nargv[10000];
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char arg1 [10];
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nargv[0]=argv[0];
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for (i=1; i<=argc; i++){
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nargv[i+1]=argv[i];
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}
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nargv[1]=arg1;
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getresuid (&a,&b,&c);
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snprintf(arg1,8,\"%d\",a);
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setresuid(c,c,c);
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execve(\"\$out/libexec/xlaunch\", nargv, envp);
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}
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EOF
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mkdir -p \$out/bin
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mkdir -p \$out/libexec
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gcc realizeuid.c -o \$out/bin/xlaunch
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echo '#! ${stdenv.shell}
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USER=\$(egrep '\\''^[-a-z0-9A-Z_]*:[^:]*:'\\''\$1'\\'':'\\'' /etc/passwd | sed -e '\\''s/:.*//'\\'' )
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shift
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case \"\$1\" in
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:*) export _display=\"\$1\";
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shift
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esac
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_display=\${_display:-:0}
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_display=\${_display#:}
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echo Using :\$_display
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if [ -n \"\$DO_X_RESET\" ]; then
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RESET_OPTION=\"-once\"
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else
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RESET_OPTION=\"-noreset\"
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fi;
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XCMD=\"\$(egrep \"^Environment=\" /etc/systemd/system/display-manager.service | sed -e \"s/Environment=/ export /\" | sed -e '\\''s/#.*//'\\'' ; echo export _XARGS_=\\\$\\( grep xserver_arguments \\\$SLIM_CFGFILE \\| sed -e s/xserver_arguments// \\| sed -e s/:0/:\${_display}/ \\| sed -e s/vt7/vt\$((7+_display))/ \\) ; echo ${xorgserver}/bin/X \\\$_XARGS_ \$RESET_OPTION )\"
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echo \"\$XCMD\"
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echo \"\$XCMD\" | bash &
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while ! test -e /tmp/.X11-unix/X\$_display &>/dev/null ; do sleep 0.5; done
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su -l \${USER:-identityless-shelter} -c \"DISPLAY=:\$_display \$*\";
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' >\$out/libexec/xlaunch
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chmod a+x \$out/libexec/xlaunch
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";
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}
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