setregid(2)setregid(2)NAMEsetregid - Set the real and effective group ID
SYNOPSIS
#include <unistd.h>
int setregid(
gid_t rgid,
gid_t egid );
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
setregid(): XSH4.2, XSH5.0
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
PARAMETERS
Specifies the new real group ID. Specifies the new effective group ID.
DESCRIPTION
The setregid() function sets the real group ID of the current process
to the value specified by the rgid parameter, and sets the effective
group ID to the value specified by the egid parameter. If the value of
rgid is -1, the real group ID is not changed; if the value of egid is
-1, the effective group ID is not changed. The real and effective group
IDs may be set to different values in the same call.
Unprivileged users may change the effective group ID to the real group
ID; only the superuser may make other changes.
Any supplementary group IDs of the calling process remain unchanged.
RETURN VALUES
Upon successful completion, a value of 0 (zero) is returned. Otherwise,
a value of -1 is returned and errno is set to indicate the error.
ERRORS
The setregid() function sets errno to the specified values for the fol‐
lowing conditions:
The value of the rgid or egid parameter is invalid or out of range.
The current process does not have superuser privilege and a change
other than changing the effective group ID to the real group ID was
specified.
SEE ALSO
Functions: getgid(2), setgid(2), setreuid(2), setrgid(3)
Standards: standards(5)setregid(2)
