explain_stat(3) 					     Library Functions Manual						   explain_stat(3)

NAME

       explain_stat - explain stat(2) errors

SYNOPSIS

       #include <libexplain/stat.h>
       const char *explain_stat(const char *pathname, const struct stat *buf);
       void explain_message_stat(char *message, int message_size, const char *pathname, const struct stat *buf);
       const char *explain_errno_stat(int errnum, const char *pathname, const struct stat *buf);
       void explain_message_errno_stat(char *message, int message_size, int errnum, const char *pathname, const struct stat *buf);

DESCRIPTION

       These functions may be used to obtain explanations for stat(2) errors .

   explain_errno_stat
       const char *explain_errno_stat(int errnum, const char *pathname, const struct stat *buf);

       The  explain_errno_stat function is used to obtain an explanation of an error returned by the stat(2) function.	The least the message will
       contain is the value of strerror(errnum), but usually it will do much better, and indicate the underlying cause in more detail.

       This function is intended to be used in a fashion similar to the following example:
	      if (stat(pathname, &buf) < 0)
	      {
		  int err = errno;
		  fprintf(stderr, "%s
", explain_errno_stat(err, pathname, &buf));
		  exit(EXIT_FAILURE);
	      }

       errnum  The error value to be decoded, usually obtained from the errno global variable just before this function is called.  This is neces-
	       sary if you need to call any code between the system call to be explained and this function, because many libc functions will alter
	       the value of errno.

       pathname
	       The original pathname, exactly as passed to the stat(2) system call.

       buf     The original buf, exactly as passed to the stat(2) system call.

       Returns:
	       The message explaining the error.  This message buffer is shared by all libexplain functions which do not supply a buffer in  their
	       argument  list.	 This  will  be  overwritten by the next call to any libexplain function which shares this buffer, including other
	       threads.

       Note: This function is not thread safe, because it shares a return buffer across all threads, and many other functions in this library.

   explain_message_errno_stat
       void explain_message_errno_stat(char *message, int message_size, int errnum, const char *pathname, const struct stat *buf);

       The explain_message_errno_stat function is used to obtain an explanation of an error returned by the stat(2) function.  The least the  mes-
       sage will contain is the value of strerror(errnum), but usually it will do much better, and indicate the underlying cause in more detail.

       This function is intended to be used in a fashion similar to the following example:
	      if (stat(pathname, &buf) < 0)
	      {
		  int err = errno;
		  char message[3000];
		  explain_message_errno_stat(message, sizeof(message), err,
		      pathname, &buf);
		  fprintf(stderr, "%s
", message);
		  exit(EXIT_FAILURE);
	      }

       message The  location  in  which to store the returned message.	Because a message return buffer has been supplied, this function is thread
	       safe.

       message_size
	       The size in bytes of the location in which to store the returned message.

       errnum  The error value to be decoded, usually obtained from the errno global variable just before this function is called.  This is neces-
	       sary if you need to call any code between the system call to be explained and this function, because many libc functions will alter
	       the value of errno.

       pathname
	       The original pathname, exactly as passed to the stat(2) system call.

       buf     The original buf, exactly as passed to the stat(2) system call.

   explain_message_stat
       void explain_message_stat(char *message, int message_size, const char *pathname, const struct stat *buf);

       The explain_message_stat function is used to obtain an explanation of an error returned by the stat(2) function.   The  least  the  message
       will contain is the value of strerror(errno), but usually it will do much better, and indicate the underlying cause in more detail.

       The errno global variable will be used to obtain the error value to be decoded.

       This function is intended to be used in a fashion similar to the following example:
	      if (stat(pathname, &buf) < 0)
	      {
		  char message[3000];
		  explain_message_stat(message, sizeof(message), pathname, &buf);
		  fprintf(stderr, "%s
", message);
		  exit(EXIT_FAILURE);
	      }

       message The  location  in  which to store the returned message.	Because a message return buffer has been supplied, this function is thread
	       safe.

       message_size
	       The size in bytes of the location in which to store the returned message.

       pathname
	       The original pathname, exactly as passed to the stat(2) system call.

       buf     The original buf, exactly as passed to the stat(2) system call.

   explain_stat
       const char *explain_stat(const char *pathname, const struct stat * buf);

       The explain_stat function is used to obtain an explanation of an error returned by the stat(2) function.  The least the message	will  con-
       tain is the value of strerror(errno), but usually it will do much better, and indicate the underlying cause in more detail.

       The errno global variable will be used to obtain the error value to be decoded.

       This function is intended to be used in a fashion similar to the following example:
	      if (stat(pathname, &buf) < 0)
	      {
		  fprintf(stderr, "%s
", explain_stat(pathname, &buf));
		  exit(EXIT_FAILURE);
	      }

       pathname
	       The original pathname, exactly as passed to the stat(2) system call.

       buf     The original buf, exactly as passed to the stat(2) system call.

       Returns:
	       The  message explaining the error.  This message buffer is shared by all libexplain functions which do not supply a buffer in their
	       argument list.  This will be overwritten by the next call to any libexplain function which  shares  this  buffer,  including  other
	       threads.

       Note: This function is not thread safe, because it shares a return buffer across all threads, and many other functions in this library.

COPYRIGHT

       libexplain version 0.52
       Copyright (C) 2008 Peter Miller

AUTHOR

       Written by Peter Miller <pmiller@opensource.org.au>

																   explain_stat(3)