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Manual Pages  — SETRUID

NAME

setruid, setrgid – set user and group ID

CONTENTS

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <unistd.h>

int
setruid(uid_t ruid);

int
setrgid(gid_t rgid);

DESCRIPTION

The setruid() function (setrgid()) sets the real user ID (group ID) of the current process.

RETURN VALUES

Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

COMPATIBILITY

The use of these calls is not portable. Their use is discouraged; they will be removed in the future.

ERRORS

The functions fail if:
[EPERM]
  The user is not the super user and the ID specified is not the real or effective ID.

SEE ALSO

getgid(2), getuid(2), setegid(2), seteuid(2), setgid(2), setuid(2)

HISTORY

The setruid() and setrgid() syscalls appeared in BSD 4.2 and were dropped in BSD 4.4 .

SETRUID (3) June 2, 1993

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On two occasions I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question.
— Charles Babbage