Back to index

glibc  2.9
Defines | Functions
_strerror.c File Reference
#include <libintl.h>
#include <stdio.h>
#include <string.h>
#include <mach/error.h>
#include <errorlib.h>
#include <sys/param.h>
#include <stdio-common/_itoa.h>
#include <locale.h>

Go to the source code of this file.

Defines

#define dgettext(domainname, msgid)   dcgettext (domainname, msgid, LC_MESSAGES)

Functions

char * __strerror_r (int errnum, char *buf, size_t buflen)

Define Documentation

#define dgettext (   domainname,
  msgid 
)    dcgettext (domainname, msgid, LC_MESSAGES)

Definition at line 33 of file _strerror.c.


Function Documentation

char* __strerror_r ( int  errnum,
char *  buf,
size_t  buflen 
)

Definition at line 38 of file _strerror.c.

{
  int system;
  int sub;
  int code;
  const struct error_system *es;
  extern void __mach_error_map_compat (int *);

  __mach_error_map_compat (&errnum);

  system = err_get_system (errnum);
  sub = err_get_sub (errnum);
  code = err_get_code (errnum);

  if (system > err_max_system || ! __mach_error_systems[system].bad_sub)
    {
      /* Buffer we use to print the number in.  For a maximum size for
        `int' of 8 bytes we never need more than 20 digits.  */
      char numbuf[21];
      const char *unk = _("Error in unknown error system: ");
      const size_t unklen = strlen (unk);
      char *p, *q;

      numbuf[20] = '\0';
      p = _itoa_word (errnum, &numbuf[20], 16, 1);

      /* Now construct the result while taking care for the destination
        buffer size.  */
      q = __mempcpy (buf, unk, MIN (unklen, buflen));
      if (unklen < buflen)
       memcpy (q, p, MIN (&numbuf[21] - p, buflen - unklen));

      /* Terminate the string in any case.  */
      if (buflen > 0)
       buf[buflen - 1] = '\0';

      return buf;
    }

  es = &__mach_error_systems[system];

  if (sub >= es->max_sub)
    return (char *) es->bad_sub;

  if (code >= es->subsystem[sub].max_code)
    {
      /* Buffer we use to print the number in.  For a maximum size for
        `int' of 8 bytes we never need more than 20 digits.  */
      char numbuf[21];
      const char *unk = _("Unknown error ");
      const size_t unklen = strlen (unk);
      char *p, *q;
      size_t len = strlen (es->subsystem[sub].subsys_name);

      numbuf[20] = '\0';
      p = _itoa_word (errnum, &numbuf[20], 10, 0);

      /* Now construct the result while taking care for the destination
        buffer size.  */
      q = __mempcpy (buf, unk, MIN (unklen, buflen));
      if (unklen < buflen)
       {
         q = __mempcpy (q, es->subsystem[sub].subsys_name,
                      MIN (len, buflen - unklen));
         if (unklen + len < buflen)
           {
             *q++ = ' ';
             if (unklen + len + 1 < buflen)
              memcpy (q, p,
                     MIN (&numbuf[21] - p, buflen - unklen - len - 1));
           }
       }

       /* Terminate the string in any case.  */
      if (buflen > 0)
       buf[buflen - 1] = '\0';

      return buf;
    }

  return (char *) _(es->subsystem[sub].codes[code]);
}

Here is the call graph for this function: