NAME

setegid — set the effective group ID

SYNOPSIS

#include <unistd.h>

int setegid(gid_t gid);


DESCRIPTION

If gid is equal to the real group ID or the saved set-group-ID, or if the process has appropriate privileges, setegid() shall set the effective group ID of the calling process to gid; the real group ID, saved set-group-ID, and any supplementary group IDs shall remain unchanged.

The setegid() function shall not affect the supplementary group list in any way.

RETURN VALUE

Upon successful completion, 0 shall be returned; otherwise, -1 shall be returned and errno set to indicate the error.

ERRORS

The setegid() function shall fail if:

[EINVAL]

The value of the gid argument is invalid and is not supported by the implementation.

[EPERM]

The process does not have appropriate privileges and gid does not match the real group ID or the saved set-group-ID.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

Refer to the RATIONALE section in setuid .

FUTURE DIRECTIONS

None.

SEE ALSO

exec , getegid , geteuid , getgid , getresgid , getresuid , getuid , seteuid , setgid , setregid , setresgid , setresuid , setreuid , setuid

XBD <sys/types.h> , <unistd.h>

CHANGE HISTORY

First released in Issue 6. Derived from the IEEE P1003.1a draft standard.

Issue 8

Austin Group Defect 1344 is applied, adding getresgid(), getresuid(), setresgid(), and setresuid() to SEE ALSO.