forked from Imagelibrary/rtems
3ba74c733f
* include/Makefile.am, include/rtems/libio_.h, libc/Makefile.am, libc/assoc.c, libc/assocnamebad.c, libc/base_fs.c, libc/cfsetispeed.c, libc/cfsetospeed.c, libc/chdir.c, libc/chmod.c, libc/chown.c, libc/close.c, libc/closedir.c, libc/dup2.c, libc/error.c, libc/eval.c, libc/fchdir.c, libc/fchmod.c, libc/fcntl.c, libc/fdatasync.c, libc/fpathconf.c, libc/fstat.c, libc/fsync.c, libc/ftruncate.c, libc/getdents.c, libc/ioctl.c, libc/libio.c, libc/libio_sockets.c, libc/link.c, libc/lseek.c, libc/malloc.c, libc/mallocfreespace.c, libc/mknod.c, libc/mount.c, libc/newlibc.c, libc/no_libc.c, libc/open.c, libc/read.c, libc/readlink.c, libc/rmdir.c, libc/stat.c, libc/symlink.c, libc/tcsetattr.c, libc/telldir.c, libc/ttyname.c, libc/ttyname_r.c, libc/umask.c, libc/unlink.c, libc/unmount.c, libc/utime.c, libc/write.c: assoc.h, error.h, libio_.h, libio.h, and libcsupport.h moved from libc to lib/include/rtems and now must be referenced as <rtems/XXX.h>. * include/rtems/Makefile.am, include/rtems/.cvsignore: New file. * include/rtems/assoc.h, include/rtems/error.h, include/rtems/libcsupport.h, include/rtems/libio.h, include/rtems/libio_.h: New/moved files.
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/*
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* readlink() - POSIX 1003.1b - X.X.X - XXX
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*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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*
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* $Id$
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*/
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#include <rtems/libio_.h>
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int readlink(
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const char *pathname,
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char *buf,
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int bufsize
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)
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{
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rtems_filesystem_location_info_t loc;
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int result;
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if (!buf)
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set_errno_and_return_minus_one( EFAULT );
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result = rtems_filesystem_evaluate_path( pathname, 0, &loc, FALSE );
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if ( result != 0 )
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return -1;
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if ( !loc.ops->node_type_h ){
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rtems_filesystem_freenode( &loc );
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set_errno_and_return_minus_one( ENOTSUP );
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}
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if ( (*loc.ops->node_type_h)( &loc ) != RTEMS_FILESYSTEM_SYM_LINK ){
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rtems_filesystem_freenode( &loc );
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set_errno_and_return_minus_one( EINVAL );
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}
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if ( !loc.ops->readlink_h ){
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rtems_filesystem_freenode( &loc );
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set_errno_and_return_minus_one( ENOTSUP );
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}
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result = (*loc.ops->readlink_h)( &loc, buf, bufsize );
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rtems_filesystem_freenode( &loc );
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return result;
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}
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