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/*
Copyright (C) 2014-2017 Cédric Schieli
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef WIN32
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <grp.h>
#ifdef __APPLE__
#include <AvailabilityMacros.h>
#endif
#include "JackError.h"
#endif
int
jack_group2gid(const char* group)
{
#ifdef WIN32
return -1;
#else
size_t buflen;
char *buf;
int ret;
struct group grp;
struct group *result;
if (!group || !*group)
return -1;
ret = strtol(group, &buf, 10);
if (!*buf)
return ret;
/* MacOSX only defines _SC_GETGR_R_SIZE_MAX starting from 10.4 */
#if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_4
buflen = 4096;
#else
buflen = sysconf(_SC_GETGR_R_SIZE_MAX);
if (buflen == -1)
buflen = 4096;
#endif
buf = (char*)malloc(buflen);
while (buf && ((ret = getgrnam_r(group, &grp, buf, buflen, &result)) == ERANGE)) {
buflen *= 2;
buf = (char*)realloc(buf, buflen);
}
if (!buf)
return -1;
free(buf);
if (ret || !result)
return -1;
return grp.gr_gid;
#endif
}
#ifndef WIN32
int
jack_promiscuous_perms(int fd, const char* path, gid_t gid)
{
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
if (gid >= 0) {
if (((fd < 0) ? chown(path, -1, gid) : fchown(fd, -1, gid)) < 0) {
jack_log("Cannot chgrp %s: %s. Falling back to permissive perms.", path, strerror(errno));
} else {
mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
}
}
if (((fd < 0) ? chmod(path, mode) : fchmod(fd, mode)) < 0) {
jack_log("Cannot chmod %s: %s. Falling back to default (umask) perms.", path, strerror(errno));
return -1;
}
return 0;
}
#endif
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