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

6       explain_setenv_or_die  -  change  or  add  an  environment variable and
7       report errors
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SYNOPSIS

10       #include <libexplain/setenv.h>
11       void explain_setenv_or_die(const char *name,  const  char  *value,  int
12       overwrite);
13       int  explain_setenv_on_error(const  char  *name, const char *value, int
14       overwrite);
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DESCRIPTION

17       The explain_setenv_or_die function is used to call the setenv(3) system
18       call.  On  failure  an  explanation will be printed to stderr, obtained
19       from the explain_setenv(3) function, and then the process terminates by
20       calling exit(EXIT_FAILURE).
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22       The explain_setenv_on_error function is used to call the setenv(3) sys‐
23       tem call. On failure an explanation will be printed to stderr, obtained
24       from the explain_setenv(3) function, but still returns to the caller.
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26       name    The name, exactly as to be passed to the setenv(3) system call.
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28       value   The  value,  exactly  as  to  be passed to the setenv(3) system
29               call.
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31       overwrite
32               The overwrite, exactly as to be passed to the setenv(3)  system
33               call.
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RETURN VALUE

36       The   explain_setenv_or_die  function  only  returns  on  success,  see
37       setenv(3) for more information. On failure, prints an  explanation  and
38       exits, it does not return.
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40       The explain_setenv_on_error function always returns the value return by
41       the wrapped setenv(3) system call.
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EXAMPLE

44       The explain_setenv_or_die function is intended to be used in a  fashion
45       similar to the following example:
46              explain_setenv_or_die(name, value, overwrite);
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SEE ALSO

49       setenv(3)
50               change or add an environment variable
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52       explain_setenv(3)
53               explain setenv(3) errors
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55       exit(2) terminate the calling process
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58       libexplain version 1.4
59       Copyright (C) 2010 Peter Miller
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63                                                      explain_setenv_or_die(3)
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