SETRESUIDSection: Linux Programmer's Manual (2)
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NAMEsetresuid, setresgid - set real, effective and saved user or group ID
DESCRIPTIONsetresuid (introduced in Linux 2.1.44) sets the real user ID, the effective user ID, and the saved set-user-ID of the current process.
Unprivileged user processes (i.e., processes with each of real, effective and saved user ID nonzero) may change the real, effective and saved user ID, each to one of: the current uid, the current effective uid or the current saved uid.
The super-user may set real, effective and saved user ID to arbitrary values.
If one of the parameters equals -1, the corresponding value is not changed.
Completely analogously, setresgid sets the real, effective and saved group ID's of the current process, with the same restrictions for processes with each of real, effective and saved user ID nonzero.
RETURN VALUEOn success, zero is returned. On error, -1 is returned, and errno is set appropriately.
CONFORMING TOThis call is Linux-specific.
SEE ALSOgetuid(2), setuid(2), getreuid(2), setreuid(2), getresuid(2)
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Time: 15:14:56 GMT, July 17, 2018