NAME

seteuid - set effective user ID

SYNOPSIS

#include <unistd.h>

int seteuid(uid_t uid);


DESCRIPTION

If uid is equal to the real user ID or the saved set-user-ID, or if the process has appropriate privileges, seteuid() shall set the effective user ID of the calling process to uid; the real user ID and saved set-user-ID shall remain unchanged.

The seteuid() 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 seteuid() function shall fail if:

[EINVAL]

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

[EPERM]

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

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

Refer to the RATIONALE section in setuid.

FUTURE DIRECTIONS

None.

SEE ALSO

exec, getegid, geteuid, getgid, getuid, setegid, setgid, setregid, setreuid, setuid

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

CHANGE HISTORY

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

IEEE Std 1003.1-2001/Cor 2-2004, item XSH/TC2/D6/123 is applied, making an editorial correction to the [EPERM] error in the ERRORS section.