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

6       explain_readlink_or_die  -  read  value  of  a symbolic link and report
7       errors
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SYNOPSIS

10       #include <libexplain/readlink.h>
11       ssize_t  explain_readlink_or_die(const  char  *pathname,  char   *data,
12       size_t data_size);
13       ssize_t  explain_readlink_on_error(const  char  *pathname,  char *data,
14       size_t data_size))
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DESCRIPTION

17       The explain_readlink_or_die function is used to  call  the  readlink(2)
18       system  call.  On  failure  an  explanation  will be printed to stderr,
19       obtained from the explain_readlink(3) function, and  then  the  process
20       terminates by calling exit(EXIT_FAILURE).
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22       The  explain_readlink_on_error function is used to call the readlink(2)
23       system call. On failure an  explanation  will  be  printed  to  stderr,
24       obtained  from  the  explain_readlink(3) function, but still returns to
25       the caller.
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27       pathname
28               The pathname, exactly as to be passed to the readlink(2) system
29               call.
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31       data    The  data,  exactly  as  to be passed to the readlink(2) system
32               call.
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34       data_size
35               The data_size, exactly as to be passed to the readlink(2)  sys‐
36               tem call.
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RETURN VALUE

39       The explain_readlink_or_die function only returns on success, see read‐
40       link(2) for more information. On failure,  prints  an  explanation  and
41       exits, it does not return.
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43       The  explain_readlink_on_error function always returns the value return
44       by the wrapped readlink(2) system call.
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EXAMPLE

47       The explain_readlink_or_die function is intended to be used in a  fash‐
48       ion similar to the following example:
49              ssize_t result = explain_readlink_or_die(pathname, data, data_size);
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SEE ALSO

52       readlink(2)
53               read value of a symbolic link
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55       explain_readlink(3)
56               explain readlink(2) errors
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58       exit(2) terminate the calling process
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61       libexplain version 0.40
62       Copyright (C) 2009 Peter Miller
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66                                                    explain_readlink_or_die(3)
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