1explain_setreuid_or_die(3) Library Functions Manual explain_setreuid_or_die(3)
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NAME

6       explain_setreuid_or_die - set the real and effective user ID and report
7       errors
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SYNOPSIS

10       #include <libexplain/setreuid.h>
11       void explain_setreuid_or_die(uid_t ruid, uid_t euid);
12       int explain_setreuid_on_error(uid_t ruid, uid_t euid);
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DESCRIPTION

15       The explain_setreuid_or_die function is used to  call  the  setreuid(2)
16       system  call.  On  failure  an  explanation  will be printed to stderr,
17       obtained from the explain_setreuid(3) function, and  then  the  process
18       terminates by calling exit(EXIT_FAILURE).
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20       The  explain_setreuid_on_error function is used to call the setreuid(2)
21       system call. On failure an  explanation  will  be  printed  to  stderr,
22       obtained  from  the  explain_setreuid(3) function, but still returns to
23       the caller.
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25       ruid    The ruid, exactly as to be passed  to  the  setreuid(2)  system
26               call.
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28       euid    The  euid,  exactly  as  to be passed to the setreuid(2) system
29               call.
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RETURN VALUE

32       The explain_setreuid_or_die  function  only  returns  on  success,  see
33       setreuid(2) for more information. On failure, prints an explanation and
34       exits, it does not return.
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36       The explain_setreuid_on_error function always returns the value  return
37       by the wrapped setreuid(2) system call.
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EXAMPLE

40       The  explain_setreuid_or_die function is intended to be used in a fash‐
41       ion similar to the following example:
42              explain_setreuid_or_die(ruid, euid);
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SEE ALSO

45       setreuid(2)
46               set the real and effective user ID
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48       explain_setreuid(3)
49               explain setreuid(2) errors
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51       exit(2) terminate the calling process
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54       libexplain version 1.4
55       Copyright (C) 2012 Peter Miller
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59                                                    explain_setreuid_or_die(3)
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