mirror of https://github.com/BOINC/boinc.git
141 lines
3.7 KiB
C++
141 lines
3.7 KiB
C++
// This file is part of BOINC.
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// http://boinc.berkeley.edu
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// Copyright (C) 2022 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 file at Path to user boinc_master and group 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 <pwd.h> // getpwuid
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#include <cstdio>
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#include <cerrno>
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#if HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#define VERBOSE 0
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#if VERBOSE
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#include <cstring>
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#include <time.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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static void print_to_log_file(const char *format, ...);
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#ifdef __cplusplus
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}
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static void strip_cr(char *buf);
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#endif
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#endif
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int main(int argc, char** argv) {
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passwd *pw;
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group *grp;
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uid_t master_uid = 0;
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gid_t project_gid = 0;
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int retval = 0;
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struct stat sbuf;
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pw = getpwnam("boinc_master");
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if (pw) master_uid = pw->pw_uid;
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grp = getgrnam("boinc_project");
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if (grp) project_gid = grp->gr_gid;
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#if VERBOSE
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print_to_log_file("setprojectgrp: current uid=%d, current euid=%d, current gid=%d, current egid=%d\n", getuid(), geteuid(), getgid(), getegid());
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print_to_log_file("setprojectgrp: argc=%d, arg[1]= %s, boinc_project gid = %d\n", argc, argv[1], project_gid);
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#endif
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// chown() doesn't change ownership 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], master_uid, project_gid);
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// retval = chown(argv[1], -1, project_gid);
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#if VERBOSE
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if (retval)
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print_to_log_file("setprojectgrp: chown(%s, %d, %d) failed: errno=%d %s\n", argv[1], master_uid, project_gid, errno, strerror(errno));
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else
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print_to_log_file("setprojectgrp: chown(%s, %d, %d) succeeded: errno=%d\n", argv[1], master_uid, project_gid, errno);
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#endif
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}
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}
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return retval;
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}
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#if VERBOSE
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static void print_to_log_file(const char *format, ...) {
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FILE *f;
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va_list args;
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char buf[256];
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time_t t;
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f = fopen("/Users/Shared/test_log_gfx_switcher.txt", "a");
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if (!f) return;
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// freopen(buf, "a", stdout);
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// freopen(buf, "a", stderr);
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time(&t);
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strlcpy(buf, asctime(localtime(&t)), sizeof(buf));
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strip_cr(buf);
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fputs(buf, f);
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fputs(" ", f);
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va_start(args, format);
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vfprintf(f, format, args);
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va_end(args);
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fputs("\n", f);
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fflush(f);
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fclose(f);
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chmod("/Users/Shared/test_log_gfx_switcher.txt", 0666);
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}
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static void strip_cr(char *buf)
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{
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char *theCR;
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theCR = strrchr(buf, '\n');
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if (theCR)
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*theCR = '\0';
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theCR = strrchr(buf, '\r');
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if (theCR)
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*theCR = '\0';
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}
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#endif
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