96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/*
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Copyright (C) 2014-2017 Cédric Schieli
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License
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as published by the Free Software Foundation; either version 2.1
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of the License, or (at your option) any later version.
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This program 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. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef WIN32
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <grp.h>
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#ifdef __APPLE__
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#include <AvailabilityMacros.h>
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#endif
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#include "JackError.h"
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#endif
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int
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jack_group2gid(const char* group)
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{
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#ifdef WIN32
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return -1;
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#else
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size_t buflen;
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char *buf;
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int ret;
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struct group grp;
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struct group *result;
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if (!group || !*group)
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return -1;
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ret = strtol(group, &buf, 10);
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if (!*buf)
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return ret;
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/* MacOSX only defines _SC_GETGR_R_SIZE_MAX starting from 10.4 */
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#if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_4
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buflen = 4096;
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#else
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buflen = sysconf(_SC_GETGR_R_SIZE_MAX);
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if (buflen == -1)
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buflen = 4096;
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#endif
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buf = (char*)malloc(buflen);
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while (buf && ((ret = getgrnam_r(group, &grp, buf, buflen, &result)) == ERANGE)) {
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buflen *= 2;
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buf = (char*)realloc(buf, buflen);
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}
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if (!buf)
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return -1;
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free(buf);
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if (ret || !result)
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return -1;
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return grp.gr_gid;
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#endif
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}
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#ifndef WIN32
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int
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jack_promiscuous_perms(int fd, const char* path, gid_t gid)
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{
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mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
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if (gid >= 0) {
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if (((fd < 0) ? chown(path, -1, gid) : fchown(fd, -1, gid)) < 0) {
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jack_log("Cannot chgrp %s: %s. Falling back to permissive perms.", path, strerror(errno));
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} else {
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mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
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}
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}
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if (((fd < 0) ? chmod(path, mode) : fchmod(fd, mode)) < 0) {
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jack_log("Cannot chmod %s: %s. Falling back to default (umask) perms.", path, strerror(errno));
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return -1;
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}
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return 0;
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}
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#endif
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