struct dirent variances Post: 302176186

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Top Forums Programming struct dirent variances Post 302176186 by ramen_noodle on Monday 17th of March 2008 05:07:02 PM

03-17-2008

Registered User

Hi,

I'm assuming you have looked at the references in the readdir manpage?

Code:

          struct dirent {
              ino_t          d_ino;       /* inode number */
              off_t          d_off;       /* offset to the next dirent */
              unsigned short d_reclen;    /* length of this record */
              unsigned char  d_type;      /* type of file */
              char           d_name[256]; /* filename */
          };

       According to POSIX, the dirent structure contains a field char d_name[] of unspecified size, with at most NAME_MAX characters preceding the terminating  null  byte.
       POSIX.1-2001 also documents the field ino_t d_ino as an XSI extension.  Use of other fields will harm the portability of your programs.

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LEARN ABOUT REDHAT

readdir

READDIR(3)						     Linux Programmer's Manual							READDIR(3)

NAME

       readdir - read a directory

SYNOPSIS

       #include <sys/types.h>

       #include <dirent.h>

       struct dirent *readdir(DIR *dir);

DESCRIPTION

       The  readdir() function returns a pointer to a dirent structure representing the next directory entry in the directory stream pointed to by
       dir.  It returns NULL on reaching the end-of-file or if an error occurred.

       According to POSIX, the dirent structure contains a field char d_name[] of unspecified size, with at most NAME_MAX characters preceding the
       terminating  null  character.   Use  of other fields will harm the portability of your programs.  POSIX-2001 also documents the field ino_t
       d_ino as an XSI extension.

       The data returned by readdir() may be overwritten by subsequent calls to readdir() for the same directory stream.

RETURN VALUE

       The readdir() function returns a pointer to a dirent structure, or NULL if an error occurs or end-of-file is reached.

ERRORS

       EBADF  Invalid directory stream descriptor dir.

CONFORMING TO

       SVID 3, POSIX, BSD 4.3

SEE ALSO

       read(2), closedir(3), dirfd(3), opendir(3), rewinddir(3), scandir(3), seekdir(3), telldir(3)

								    1996-04-22								READDIR(3)

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