ipsec-tools/libipsec/ipsec_strerror.3

   1 .\"     $KAME: ipsec_strerror.3,v 1.9 2001/08/17 07:21:36 itojun Exp $
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  30 .Dd May 6, 1998
  31 .Dt IPSEC_STRERROR 3
  32 .Os
  33 .\"
  34 .Sh NAME
  35 .Nm ipsec_strerror
  36 .Nd error messages for the IPsec policy manipulation library
  37 .\"
  38 .Sh LIBRARY
  39 .Lb libipsec
  40 .Sh SYNOPSIS
  41 .In netinet6/ipsec.h
  42 .Ft "const char *"
  43 .Fo ipsec_strerror
  44 .Fa void
  45 .Fc
  46 .\"
  47 .Sh DESCRIPTION
  48 .Pa netinet6/ipsec.h
  49 declares
  50 .Pp
  51 .Dl extern int ipsec_errcode ;
  52 .Pp
  53 which is used to pass an error code from the IPsec policy manipulation
  54 library to a program.
  55 .Fn ipsec_strerror
  56 can be used to obtain the error message string for the error code.
  57 .Pp
  58 The array pointed to is not to be modified by the calling program.
  59 Since
  60 .Fn ipsec_strerror
  61 uses
  62 .Xr strerror 3
  63 as underlying function, calling
  64 .Xr strerror 3
  65 after
  66 .Fn ipsec_strerror
  67 will make the return value from
  68 .Fn ipsec_strerror
  69 invalid or overwritten.
  70 .\"
  71 .Sh RETURN VALUES
  72 .Fn ipsec_strerror
  73 always returns a pointer to a C string.
  74 The C string must not be overwritten by the calling program.
  75 .\"
  76 .Sh SEE ALSO
  77 .Xr ipsec_set_policy 3
  78 .\"
  79 .Sh HISTORY
  80 .Fn ipsec_strerror
  81 first appeared in the WIDE/KAME IPv6 protocol stack kit.
  82 .\"
  83 .Sh BUGS
  84 .Fn ipsec_strerror
  85 will return its result which may be overwritten by subsequent calls.
  86 .Pp
  87 .Va ipsec_errcode
  88 is not thread safe.