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setregid(2)
NAME
  setregid - 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 standards
  as follows:

  setregid(): XSH4.2, XSH5.0

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

PARAMETERS
  rgid
      Specifies the new real group ID.

  egid
      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
  following conditions:

  [EINVAL]
      The value of the rgid or egid parameter is invalid or out of range.

  [EPERM]
      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)

Index for Section 2

Alphabetical listing for S

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