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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /dirent
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initial import
Diffstat (limited to 'dirent')
-rw-r--r--dirent/Makefile32
-rw-r--r--dirent/alphasort.c29
-rw-r--r--dirent/dirent.h149
-rw-r--r--dirent/list.c68
-rw-r--r--dirent/scandir.c89
-rw-r--r--dirent/tst-seekdir.c40
6 files changed, 407 insertions, 0 deletions
diff --git a/dirent/Makefile b/dirent/Makefile
new file mode 100644
index 0000000..ed3335c
--- /dev/null
+++ b/dirent/Makefile
@@ -0,0 +1,32 @@
+# Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Library General Public License as
+# published by the Free Software Foundation; either version 2 of the
+# License, or (at your option) any later version.
+
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Library General Public License for more details.
+
+# You should have received a copy of the GNU Library General Public
+# License along with the GNU C Library; see the file COPYING.LIB. If
+# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+# Cambridge, MA 02139, USA.
+
+#
+# Sub-makefile for dirent portion of the library.
+#
+subdir := dirent
+
+headers := dirent.h dirstream.h
+routines := opendir closedir readdir rewinddir \
+ seekdir telldir scandir alphasort \
+ getdents
+distribute := direct.h
+
+tests := list tst-seekdir
+
+include ../Rules
diff --git a/dirent/alphasort.c b/dirent/alphasort.c
new file mode 100644
index 0000000..a7bdf38
--- /dev/null
+++ b/dirent/alphasort.c
@@ -0,0 +1,29 @@
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <dirent.h>
+#include <string.h>
+
+int
+DEFUN(alphasort, (a, b),
+ CONST PTR a AND CONST PTR b)
+{
+ return strcmp (((struct dirent *) a)->d_name,
+ ((struct dirent *) b)->d_name);
+}
diff --git a/dirent/dirent.h b/dirent/dirent.h
new file mode 100644
index 0000000..b102a47
--- /dev/null
+++ b/dirent/dirent.h
@@ -0,0 +1,149 @@
+/* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+/*
+ * POSIX Standard: 5.1.2 Directory Operations <dirent.h>
+ */
+
+#ifndef _DIRENT_H
+
+#define _DIRENT_H 1
+#include <features.h>
+
+__BEGIN_DECLS
+
+#include <gnu/types.h>
+
+
+/* Directory entry structure.
+
+ This structure is laid out identically to the `struct direct' that
+ represents directory entries in the GNU Hurd and in BSD 4.4 (and
+ incidentally, on disk in the Berkeley fast file system). The `readdir'
+ implementations for GNU and BSD know this; you must change them if you
+ change this structure. */
+
+struct dirent
+ {
+ __ino_t d_fileno; /* File serial number. */
+ unsigned short int d_reclen; /* Length of the whole `struct dirent'. */
+ unsigned char d_type; /* File type, possibly unknown. */
+ unsigned char d_namlen; /* Length of the file name. */
+
+ /* Only this member is in the POSIX standard. */
+ char d_name[1]; /* File name (actually longer). */
+ };
+
+#if defined(__USE_BSD) || defined(__USE_MISC)
+#define d_ino d_fileno /* Backward compatibility. */
+#endif
+
+#ifdef __USE_BSD
+/* File types for `d_type'. */
+enum
+ {
+ DT_UNKNOWN = 0,
+ DT_FIFO = 1,
+ DT_CHR = 2,
+ DT_DIR = 4,
+ DT_BLK = 6,
+ DT_REG = 8,
+ DT_LNK = 10,
+ DT_SOCK = 12
+ };
+
+/* Convert between stat structure types and directory types. */
+#define IFTODT(mode) (((mode) & 0170000) >> 12)
+#define DTTOIF(dirtype) ((dirtype) << 12)
+#endif
+
+
+/* Get the system-dependent definition of `DIR',
+ the data type of directory stream objects. */
+#include <dirstream.h>
+
+/* Open a directory stream on NAME.
+ Return a DIR stream on the directory, or NULL if it could not be opened. */
+extern DIR *opendir __P ((__const char *__name));
+
+/* Close the directory stream DIRP.
+ Return 0 if successful, -1 if not. */
+extern int closedir __P ((DIR * __dirp));
+
+/* Read a directory entry from DIRP.
+ Return a pointer to a `struct dirent' describing the entry,
+ or NULL for EOF or error. The storage returned may be overwritten
+ by a later readdir call on the same DIR stream. */
+extern struct dirent *readdir __P ((DIR * __dirp));
+
+/* Rewind DIRP to the beginning of the directory. */
+extern void rewinddir __P ((DIR * __dirp));
+
+#if defined(__USE_BSD) || defined(__USE_MISC)
+
+#ifndef MAXNAMLEN
+/* Get the definitions of the POSIX.1 limits. */
+#include <posix1_lim.h>
+
+/* `MAXNAMLEN' is the BSD name for what POSIX calls `NAME_MAX'. */
+#ifdef NAME_MAX
+#define MAXNAMLEN NAME_MAX
+#else
+#define MAXNAMLEN 255
+#endif
+#endif
+
+#include <gnu/types.h>
+#define __need_size_t
+#include <stddef.h>
+
+/* Seek to position POS on DIRP. */
+extern void seekdir __P ((DIR * __dirp, __off_t __pos));
+
+/* Return the current position of DIRP. */
+extern __off_t telldir __P ((DIR * __dirp));
+
+/* Scan the directory DIR, calling SELECT on each directory entry.
+ Entries for which SELECT returns nonzero are individually malloc'd,
+ sorted using qsort with CMP, and collected in a malloc'd array in
+ *NAMELIST. Returns the number of entries selected, or -1 on error. */
+extern int scandir __P ((__const char *__dir,
+ struct dirent ***__namelist,
+ int (*__select) __P ((struct dirent *)),
+ int (*__cmp) __P ((__const __ptr_t,
+ __const __ptr_t))));
+
+/* Function to compare two `struct dirent's alphabetically. */
+extern int alphasort __P ((__const __ptr_t, __const __ptr_t));
+
+
+/* Read directory entries from FD into BUF, reading at most NBYTES.
+ Reading starts at offset *BASEP, and *BASEP is updated with the new
+ position after reading. Returns the number of bytes read; zero when at
+ end of directory; or -1 for errors. */
+extern __ssize_t __getdirentries __P ((int __fd, char *__buf,
+ size_t __nbytes, __off_t *__basep));
+extern __ssize_t getdirentries __P ((int __fd, char *__buf,
+ size_t __nbytes, __off_t *__basep));
+
+
+#endif /* Use BSD or misc. */
+
+__END_DECLS
+
+#endif /* dirent.h */
diff --git a/dirent/list.c b/dirent/list.c
new file mode 100644
index 0000000..606bd42
--- /dev/null
+++ b/dirent/list.c
@@ -0,0 +1,68 @@
+/* Copyright (C) 1991, 1993 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <dirent.h>
+
+
+void
+DEFUN(test, (name), CONST char *name)
+{
+ DIR *dirp;
+ struct dirent *entp;
+
+ puts(name);
+
+ dirp = opendir(name);
+ if (dirp == NULL)
+ {
+ perror("opendir");
+ return;
+ }
+
+ errno = 0;
+ while ((entp = readdir(dirp)) != NULL)
+ printf("%s\tfile number %lu\n",
+ entp->d_name, (unsigned long int) entp->d_fileno);
+
+ if (errno)
+ perror ("readdir");
+
+ if (closedir(dirp) < 0)
+ perror("closedir");
+}
+
+int
+DEFUN(main, (argc, argv), int argc AND char **argv)
+{
+ --argc;
+ ++argv;
+
+ if (argc == 0)
+ test(".");
+ else
+ while (argc-- > 0)
+ test(*argv++);
+
+ exit(0);
+ return(0);
+}
diff --git a/dirent/scandir.c b/dirent/scandir.c
new file mode 100644
index 0000000..6794ead
--- /dev/null
+++ b/dirent/scandir.c
@@ -0,0 +1,89 @@
+/* Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <dirent.h>
+#include <stdlib.h>
+
+int
+DEFUN(scandir, (dir, namelist, select, cmp),
+ CONST char *dir AND
+ struct dirent ***namelist AND
+ int EXFUN((*select), (struct dirent *)) AND
+ int EXFUN((*cmp), (CONST PTR, CONST PTR)))
+{
+ DIR *dp = opendir (dir);
+ struct dirent **v = NULL;
+ size_t vsize = 0, i;
+ struct dirent *d;
+ int save;
+
+ if (dp == NULL)
+ return -1;
+
+ save = errno;
+ errno = 0;
+
+ i = 0;
+ while ((d = readdir (dp)) != NULL)
+ if (select == NULL || (*select) (d))
+ {
+ if (i == vsize)
+ {
+ struct dirent **new;
+ if (vsize == 0)
+ vsize = 10;
+ else
+ vsize *= 2;
+ new = (struct dirent **) realloc (v, vsize * sizeof (*v));
+ if (new == NULL)
+ {
+ lose:
+ errno = ENOMEM;
+ break;
+ }
+ v = new;
+ }
+
+ v[i] = (struct dirent *) malloc (sizeof (**v));
+ if (v[i] == NULL)
+ goto lose;
+
+ *v[i++] = *d;
+ }
+
+ if (errno != 0)
+ {
+ save = errno;
+ (void) closedir (dp);
+ while (i > 0)
+ free (v[--i]);
+ free (v);
+ errno = save;
+ return -1;
+ }
+
+ (void) closedir (dp);
+ errno = save;
+
+ /* Sort the list if we have a comparison function to sort with. */
+ if (cmp != NULL)
+ qsort (v, i, sizeof (*v), cmp);
+ *namelist = v;
+ return i;
+}
diff --git a/dirent/tst-seekdir.c b/dirent/tst-seekdir.c
new file mode 100644
index 0000000..fc28246
--- /dev/null
+++ b/dirent/tst-seekdir.c
@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <dirent.h>
+#include <stdlib.h>
+
+int
+main ()
+{
+
+ DIR * dirp;
+ long save3;
+ int i = 0;
+ struct dirent *dp;
+
+ dirp = opendir(".");
+ for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp))
+ {
+ /* save position 3 (fourth entry) */
+ if (i++ == 3)
+ save3 = telldir(dirp);
+
+ printf("%s\n", dp->d_name);
+
+ /* stop at 400 (just to make sure dirp->__offset and dirp->__size are
+ scrambled */
+ if (i == 400)
+ break;
+ }
+
+ /* go back to saved entry */
+ seekdir (dirp, save3);
+
+
+ /* print remaining files (3-last) */
+ for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp))
+ printf("%s\n", dp->d_name);
+
+
+ closedir (dirp);
+ exit(0);
+}