Back to index

glibc  2.9
Defines | Functions | Variables
error.c File Reference
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "error.h"

Go to the source code of this file.

Defines

#define _(String)   String

Functions

static void print_errno_message (int errnum)
static void error_tail (int status, int errnum, const char *message, va_list args)
void error (int status, int errnum, const char *message,...)
void error_at_line (int status, int errnum, const char *file_name, unsigned int line_number, const char *message,...)

Variables

void(* error_print_progname )(void)
unsigned int error_message_count
char * program_name
int error_one_per_line

Define Documentation

#define _ (   String)    String

Definition at line 42 of file error.c.


Function Documentation

void error ( int  status,
int  errnum,
const char *  message,
  ... 
)

Definition at line 220 of file error.c.

{
  va_list args;

#if defined _LIBC && defined __libc_ptf_call
  /* We do not want this call to be cut short by a thread
     cancellation.  Therefore disable cancellation for now.  */
  int state = PTHREAD_CANCEL_ENABLE;
  __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
                 0);
#endif

  fflush (stdout);
#ifdef _LIBC
  _IO_flockfile (stderr);
#endif
  if (error_print_progname)
    (*error_print_progname) ();
  else
    {
#if _LIBC
      __fxprintf (NULL, "%s: ", program_name);
#else
      fprintf (stderr, "%s: ", program_name);
#endif
    }

  va_start (args, message);
  error_tail (status, errnum, message, args);

#ifdef _LIBC
  _IO_funlockfile (stderr);
# ifdef __libc_ptf_call
  __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
# endif
#endif
}

Here is the call graph for this function:

void error_at_line ( int  status,
int  errnum,
const char *  file_name,
unsigned int  line_number,
const char *  message,
  ... 
)

Definition at line 263 of file error.c.

{
  va_list args;

  if (error_one_per_line)
    {
      static const char *old_file_name;
      static unsigned int old_line_number;

      if (old_line_number == line_number
         && (file_name == old_file_name
             || strcmp (old_file_name, file_name) == 0))
       /* Simply return and print nothing.  */
       return;

      old_file_name = file_name;
      old_line_number = line_number;
    }

#if defined _LIBC && defined __libc_ptf_call
  /* We do not want this call to be cut short by a thread
     cancellation.  Therefore disable cancellation for now.  */
  int state = PTHREAD_CANCEL_ENABLE;
  __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
                 0);
#endif

  fflush (stdout);
#ifdef _LIBC
  _IO_flockfile (stderr);
#endif
  if (error_print_progname)
    (*error_print_progname) ();
  else
    {
#if _LIBC
      __fxprintf (NULL, "%s:", program_name);
#else
      fprintf (stderr, "%s:", program_name);
#endif
    }

#if _LIBC
  __fxprintf (NULL, file_name != NULL ? "%s:%d: " : " ",
             file_name, line_number);
#else
  fprintf (stderr, file_name != NULL ? "%s:%d: " : " ",
          file_name, line_number);
#endif

  va_start (args, message);
  error_tail (status, errnum, message, args);

#ifdef _LIBC
  _IO_funlockfile (stderr);
# ifdef __libc_ptf_call
  __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
# endif
#endif
}

Here is the call graph for this function:

static void error_tail ( int  status,
int  errnum,
const char *  message,
va_list  args 
) [static]

Definition at line 129 of file error.c.

{
#if _LIBC
  if (_IO_fwide (stderr, 0) > 0)
    {
# define ALLOCA_LIMIT 2000
      size_t len = strlen (message) + 1;
      wchar_t *wmessage = NULL;
      mbstate_t st;
      size_t res;
      const char *tmp;
      bool use_malloc = false;

      while (1)
       {
         if (__libc_use_alloca (len * sizeof (wchar_t)))
           wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
         else
           {
             if (!use_malloc)
              wmessage = NULL;

             wchar_t *p = (wchar_t *) realloc (wmessage,
                                          len * sizeof (wchar_t));
             if (p == NULL)
              {
                free (wmessage);
                fputws_unlocked (L"out of memory\n", stderr);
                return;
              }
             wmessage = p;
             use_malloc = true;
           }

         memset (&st, '\0', sizeof (st));
         tmp = message;

         res = mbsrtowcs (wmessage, &tmp, len, &st);
         if (res != len)
           break;

         if (__builtin_expect (len >= SIZE_MAX / 2, 0))
           {
             /* This really should not happen if everything is fine.  */
             res = (size_t) -1;
             break;
           }

         len *= 2;
       }

      if (res == (size_t) -1)
       {
         /* The string cannot be converted.  */
         if (use_malloc)
           {
             free (wmessage);
             use_malloc = false;
           }
         wmessage = (wchar_t *) L"???";
       }

      __vfwprintf (stderr, wmessage, args);

      if (use_malloc)
       free (wmessage);
    }
  else
#endif
    vfprintf (stderr, message, args);
  va_end (args);

  ++error_message_count;
  if (errnum)
    print_errno_message (errnum);
#if _LIBC
  __fxprintf (NULL, "\n");
#else
  putc ('\n', stderr);
#endif
  fflush (stderr);
  if (status)
    exit (status);
}

Here is the call graph for this function:

Here is the caller graph for this function:

static void print_errno_message ( int  errnum) [static]

Definition at line 98 of file error.c.

{
  char const *s;

#if defined HAVE_STRERROR_R || _LIBC
  char errbuf[1024];
# if STRERROR_R_CHAR_P || _LIBC
  s = __strerror_r (errnum, errbuf, sizeof errbuf);
# else
  if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
    s = errbuf;
  else
    s = 0;
# endif
#else
  s = strerror (errnum);
#endif

#if !_LIBC
  if (! s)
    s = _("Unknown system error");
#endif

#if _LIBC
  __fxprintf (NULL, ": %s", s);
#else
  fprintf (stderr, ": %s", s);
#endif
}

Here is the call graph for this function:

Here is the caller graph for this function:


Variable Documentation

Definition at line 51 of file error.c.

Definition at line 260 of file error.c.

void(* error_print_progname)(void)

Definition at line 48 of file error.c.

char* program_name