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 group ID or the saved set-group-ID.

The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

Refer to the RATIONALE section in setuid(3) .

FUTURE DIRECTIONS

None.

SEE ALSO

exec(3) , getegid(3) , geteuid(3) , getgid(3) , getuid(3) , setegid(3) , setgid(3) , setregid(3) , setreuid(3) , setuid(3) , the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <sys/types.h>, <unistd.h>

CHANGE HISTORY

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

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