GETRESUID Section: Linux Programmer's Manual (2) Updated: 16 July 2025 Index   NAME getresuid, getresgid - get real, effective and saved user or group ID   SYNOPSIS #include <unistd.h> int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid); int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);   DESCRIPTION getresuid and getresgid (both introduced in Linux 2.1.44) get the real, effective and saved user ID's (resp. group ID's) of the current process.   RETURN VALUE On success, zero is returned. On error, -1 is returned, and errno is set appropriately.   ERRORS EFAULT One of the arguments specified an address outside the calling program's address space.   CONFORMING TO This call is Linux-specific.   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS CONFORMING TO SEE ALSO This document was created by using the manual pages. Time: 11:56:06 GMT, March 24, 2025