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initial commit 2019-09-07 14:03:22 +04:00 • committed by vvaltman
commit c2da007f40
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41
tdutils/td/utils/port/user.cpp Normal file
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#include "user.h"
#if TD_LINUX
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
#endif
namespace td {
#if TD_LINUX
td::Status change_user(td::Slice user) {
struct passwd *pw;
if (getuid() != 0 || geteuid() != 0) {
return td::Status::PosixError(errno, "cannot setuid() as not root");
}
if ((pw = getpwnam(user.str().c_str())) == 0) {
return td::Status::PosixError(errno, PSTRING() << "bad user '" << user << "'");
}
gid_t gid = pw->pw_gid;
if (setgroups(1, &gid) < 0) {
return td::Status::PosixError(errno, "failed to clear supplementary groups list");
}
if (initgroups(user.str().c_str(), gid) != 0) {
return td::Status::PosixError(errno, "failed to load groups of user");
}
if (setgid(pw->pw_gid) < 0) {
return td::Status::PosixError(errno, "failed to setgid()");
}
if (setuid(pw->pw_uid) < 0) {
return td::Status::PosixError(errno, "failed to setuid()");
}
return td::Status::OK();
}
#else
td::Status change_user(td::Slice username) {
return td::Status::Error("not implemented");
}
#endif
} // namespace td