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

6       explain_fcntl_or_die - manipulate a file descriptor and report errors
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SYNOPSIS

9       #include <libexplain/fcntl.h>
10       int explain_fcntl_or_die(int fildes, int command, long arg);
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DESCRIPTION

13       The  explain_fcntl_or_die  function is used to call the fcntl(2) system
14       call.  On failure an explanation will be printed  to  stderr,  obtained
15       from  explain_fcntl(3),  and  then  the  process  terminates by calling
16       exit(EXIT_FAILURE).
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18       This function is intended to be used in a fashion similar to  the  fol‐
19       lowing example:
20              int result = explain_fcntl_or_die(fildes, command, arg);
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22       fildes  The  fildes,  exactly  as  to  be passed to the fcntl(2) system
23               call.
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25       command The command, exactly as to be passed  to  the  fcntl(2)  system
26               call.
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28       arg     The arg, exactly as to be passed to the fcntl(2) system call.
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30       Returns:
31               This  function only returns on success, and it returns whatever
32               was returned by the fcntl(2) call; depending  on  the  command,
33               this  may  have  no use.  On failure, prints an explanation and
34               exits, it does not return.
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SEE ALSO

37       fcntl(2)
38               manipulate a file descriptor
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40       explain_fcntl(3)
41               explain fcntl(2) errors
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43       exit(2) terminate the calling process
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46       libexplain version 0.40
47       Copyright (C) 2008 Peter Miller
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51                                                       explain_fcntl_or_die(3)
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