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

6       explain_setgid_or_die - set group identity and report errors
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SYNOPSIS

9       #include <libexplain/setgid.h>
10       void explain_setgid_or_die(gid_t gid);
11       int explain_setgid_on_error(gid_t gid);
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DESCRIPTION

14       The explain_setgid_or_die function is used to call the setgid(2) system
15       call. On failure an explanation will be  printed  to  stderr,  obtained
16       from the explain_setgid(3) function, and then the process terminates by
17       calling exit(EXIT_FAILURE).
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19       The explain_setgid_on_error function is used to call the setgid(2) sys‐
20       tem call. On failure an explanation will be printed to stderr, obtained
21       from the explain_setgid(3) function, but still returns to the caller.
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23       gid     The gid, exactly as to be passed to the setgid(2) system call.
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RETURN VALUE

26       The explain_setgid_or_die function only returns on  success,  see  set‐
27       gid(2)  for  more  information.  On  failure, prints an explanation and
28       exits, it does not return.
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30       The explain_setgid_on_error function always returns the value return by
31       the wrapped setgid(2) system call.
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EXAMPLE

34       The  explain_setgid_or_die function is intended to be used in a fashion
35       similar to the following example:
36              explain_setgid_or_die(gid);
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SEE ALSO

39       setgid(2)
40               set group identity
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42       explain_setgid(3)
43               explain setgid(2) errors
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45       exit(2) terminate the calling process
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48       libexplain version 1.4
49       Copyright (C) 2012 Peter Miller
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53                                                      explain_setgid_or_die(3)
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