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SETRESUID(2) BSD System Calls Manual SETRESUID(2) NAME getresgid, getresuid, setresgid, setresuid -- get or set real, effective and saved user or group ID LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <sys/types.h> #include <unistd.h> int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid); int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid); int setresgid(gid_t rgid, gid_t egid, gid_t sgid); int setresuid(uid_t ruid, uid_t euid, uid_t suid); DESCRIPTION The setresuid() system call sets the real, effective and saved user IDs of the current process. The analogous setresgid() sets the real, effec- tive and saved group IDs. Privileged processes may set these IDs to arbitrary values. Unprivileged processes are restricted in that each of the new IDs must match one of the current IDs. Passing -1 as an argument causes the corresponding value to remain un- changed. The getresgid() and getresuid() calls retrieve the real, effective, and saved group and user IDs of the current process, respectively. RETURN VALUES Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error. ERRORS [EPERM] The calling process was not privileged and tried to change one or more IDs to a value which was not the current real ID, the current effective ID nor the cur- rent saved ID. [EFAULT] An address passed to getresgid() or getresuid() was invalid. SEE ALSO getegid(2), geteuid(2), getgid(2), getuid(2), issetugid(2), setgid(2), setregid(2), setreuid(2), setuid(2) HISTORY These functions first appeared in HP-UX. BSD February 7, 2015 BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | HISTORY
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