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SETRESUID (2) | System calls | Unix Manual Pages | :man

NAME

getresgid, getresuid, setresgid, setresuid - "get or set real, effective and saved user or group ID"

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards
History

LIBRARY


.Lb libc

SYNOPSIS


.In sys/types.h
.In 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, effective 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 unchanged.

The getresgid and getresuid calls retrieve the real, effective, and saved group and user IDs of the current process, respectively.

RETURN VALUES


.Rv -std

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 current 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)

STANDARDS

HISTORY


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