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https://github.com/danog/ton.git
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42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
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#include "user.h"
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#if TD_LINUX
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#include <unistd.h>
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#include <sys/types.h>
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#include <pwd.h>
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#include <grp.h>
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#endif
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namespace td {
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#if TD_LINUX
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td::Status change_user(td::Slice user) {
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struct passwd *pw;
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if (getuid() != 0 || geteuid() != 0) {
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return td::Status::PosixError(errno, "cannot setuid() as not root");
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}
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if ((pw = getpwnam(user.str().c_str())) == 0) {
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return td::Status::PosixError(errno, PSTRING() << "bad user '" << user << "'");
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}
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gid_t gid = pw->pw_gid;
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if (setgroups(1, &gid) < 0) {
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return td::Status::PosixError(errno, "failed to clear supplementary groups list");
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}
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if (initgroups(user.str().c_str(), gid) != 0) {
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return td::Status::PosixError(errno, "failed to load groups of user");
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}
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if (setgid(pw->pw_gid) < 0) {
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return td::Status::PosixError(errno, "failed to setgid()");
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}
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if (setuid(pw->pw_uid) < 0) {
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return td::Status::PosixError(errno, "failed to setuid()");
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}
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return td::Status::OK();
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}
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#else
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td::Status change_user(td::Slice username) {
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return td::Status::Error("not implemented");
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}
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#endif
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} // namespace td
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