1explain_setresgid_or_die(3)Library Functions Manualexplain_setresgid_or_die(3)
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NAME

6       explain_setresgid_or_die - set r/e/s group ID and report errors
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SYNOPSIS

9       #include <libexplain/setresgid.h>
10       void explain_setresgid_or_die(gid_t rgid, gid_t egid, gid_t sgid);
11       int explain_setresgid_on_error(gid_t rgid, gid_t egid, gid_t sgid);
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DESCRIPTION

14       The  explain_setresgid_or_die function is used to call the setresgid(2)
15       system call. On failure an  explanation  will  be  printed  to  stderr,
16       obtained  from  the explain_setresgid(3) function, and then the process
17       terminates by calling exit(EXIT_FAILURE).
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19       The explain_setresgid_on_error function is used  to  call  the  setres‐
20       gid(2)  system  call.  On  failure  an  explanation  will be printed to
21       stderr, obtained from  the  explain_setresgid(3)  function,  but  still
22       returns to the caller.
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24       rgid    The  rgid,  exactly  as to be passed to the setresgid(2) system
25               call.
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27       egid    The egid, exactly as to be passed to  the  setresgid(2)  system
28               call.
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30       sgid    The  sgid,  exactly  as to be passed to the setresgid(2) system
31               call.
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RETURN VALUE

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

42       The explain_setresgid_or_die function is intended to be used in a fash‐
43       ion similar to the following example:
44              explain_setresgid_or_die(rgid, egid, sgid);
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SEE ALSO

47       setresgid(2)
48               set real, effective and saved group ID
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50       explain_setresgid(3)
51               explain setresgid(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_setresgid_or_die(3)
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