seteuid(3p) — Linux manual page

SETEUID(3P)             POSIX Programmer's Manual             SETEUID(3P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The
       Linux implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior), or
       the interface may not be implemented on Linux.

NAME         top

       seteuid — set effective user ID

SYNOPSIS         top

       #include <unistd.h>

       int seteuid(uid_t uid);

DESCRIPTION         top

       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         top

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

ERRORS         top

       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.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       Refer to the RATIONALE section in setuid(3p).

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       exec(1p), getegid(3p), geteuid(3p), getgid(3p), getuid(3p),
       setegid(3p), setgid(3p), setregid(3p), setreuid(3p), setuid(3p)

       The Base Definitions volume of POSIX.1‐2017, sys_types.h(0p),
       unistd.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics Engineers,
       Inc and The Open Group.  In the event of any discrepancy between
       this version and the original IEEE and The Open Group Standard,
       the original IEEE and The Open Group Standard is the referee
       document. The original Standard can be obtained online at
       http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page
       are most likely to have been introduced during the conversion of
       the source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                2017                       SETEUID(3P)

Pages that refer to this page: unistd.h(0p),  getegid(3p),  geteuid(3p),  getgid(3p),  getuid(3p),  setegid(3p),  setgid(3p),  setregid(3p),  setreuid(3p),  setuid(3p)

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