1explain_getresuid_or_die(3)Library Functions Manualexplain_getresuid_or_die(3)
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NAME

6       explain_getresuid_or_die - get r/e/s user IDs and report errors
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SYNOPSIS

9       #include <libexplain/getresuid.h>
10       void explain_getresuid_or_die(uid_t *ruid, uid_t *euid, uid_t *suid);
11       int explain_getresuid_on_error(uid_t *ruid, uid_t *euid, uid_t *suid);
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DESCRIPTION

14       The  explain_getresuid_or_die function is used to call the getresuid(2)
15       system call. On failure an  explanation  will  be  printed  to  stderr,
16       obtained  from  the explain_getresuid(3) function, and then the process
17       terminates by calling exit(EXIT_FAILURE).
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19       The explain_getresuid_on_error function is  used  to  call  the  getre‐
20       suid(2)  system  call.  On  failure  an  explanation will be printed to
21       stderr, obtained from  the  explain_getresuid(3)  function,  but  still
22       returns to the caller.
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24       ruid    The  ruid,  exactly  as to be passed to the getresuid(2) system
25               call.
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27       euid    The euid, exactly as to be passed to  the  getresuid(2)  system
28               call.
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30       suid    The  suid,  exactly  as to be passed to the getresuid(2) system
31               call.
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RETURN VALUE

34       The explain_getresuid_or_die function  only  returns  on  success,  see
35       getresuid(2)  for  more  information. On failure, prints an explanation
36       and exits, it does not return.
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38       The explain_getresuid_on_error function always returns the value return
39       by the wrapped getresuid(2) system call.
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EXAMPLE

42       The explain_getresuid_or_die function is intended to be used in a fash‐
43       ion similar to the following example:
44              explain_getresuid_or_die(ruid, euid, suid);
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SEE ALSO

47       getresuid(2)
48               get real, effective and saved user IDs
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50       explain_getresuid(3)
51               explain getresuid(2) errors
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53       exit(2) terminate the calling process
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56       libexplain version 1.4
57       Copyright (C) 2012 Peter Miller
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61                                                   explain_getresuid_or_die(3)
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