strerror - Set Pointer to Run-Time Error Message

Syntax

#include <string.h>
char *strerror(int errnum);

Description

strerror maps the error number in errnum to an error message string.

Returns

strerror returns a pointer to the string. The contents of the error message string is determined by the setting of the LC_MESSAGES category in the current locale.

The value of errno may be set to:

EILSEQ

An encoding error has occurred converting a multibyte character.
E2BIG
The output buffer is too small.
Example Code

This example opens a file and prints a run-time error message if an error occurs.

#include <stdio.h>#include <string.h>
#include <errno.h>

#define FILENAME "strerror.dat"

int main(void)
{
   FILE *stream;

   if (NULL == (stream = fopen(FILENAME, "r")))
      printf(" %s \n", strerror(errno));
   return 0;
}

Related Information

• clearerr
  
• ferror
  
• perror
  
• strerror

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