mirror of https://github.com/BOINC/boinc.git
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
// This file is part of BOINC.
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// http://boinc.berkeley.edu
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// Copyright (C) 2008 University of California
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//
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// BOINC is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License
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// as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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//
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// BOINC is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
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// setprojectgrp.C
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//
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// When run as
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// setprojectgrp Path
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// sets group of file at Path to boinc_project
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//
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// setprojectgrp runs setuid boinc_master and setgid boinc_project
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#include <unistd.h>
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#include <grp.h>
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#include <stdio.h>
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#include <cerrno>
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#include <sys/stat.h>
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int main(int argc, char** argv) {
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gid_t project_gid;
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int retval = 0;
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struct stat sbuf;
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project_gid = getegid();
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#if 0 // For debugging
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fprintf(stderr, "setprojectgrp argc=%d, arg[1]= %s, boinc_project gid = %d\n", argc, argv[1], project_gid);
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fflush(stderr);
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#endif
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// chown() doesn't change ownershp of symbolic links; it follows the link and
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// changes the file is not available in OS 10.3.9.
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//
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// But we don't really need to worry about this, because the system ignores
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// ownership & permissions of symbolic links anyway.
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//
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// Also, the target of a symbolic link may not be present if the slot containing
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// the link is no longer in use.
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//
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if (lstat(argv[1], &sbuf) == 0) {
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if (!S_ISLNK(sbuf.st_mode)) {
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retval = chown(argv[1], (uid_t)-1, project_gid);
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if (retval)
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fprintf(stderr, "chown(%s, -1, %d) failed: errno=%d\n", argv[1], project_gid, errno);
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}
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}
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return retval;
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}
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