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perror()

PROTOTYPE

#include <stdio.h>

void perror(const char *s);

DESCRIPTION

perror() writes an error message-the same returned by strerror(errno)-to the open regular file identified by stderr. If s is not NULL, the string it references is written to stderr, followed by “: “, before the error message. A terminating newline character is written last.

The status change and data modification timestamps of stderr are updated.

ERROR CODES

EBADF	stderr is not the handle of a file open in write or append mode.
ENOSPC	The volume is full.

EXAMPLE

/*-------------------------------------------------------------*/
/* Open directory associated with path.                        */
/*-------------------------------------------------------------*/
cur_dir = opendir(path);
if (cur_dir == NULL)
  perror("opendir() failed");