xref: /titanic_41/usr/src/cmd/sendmail/db/os/os_dir.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
1 /*-
2  * See the file LICENSE for redistribution information.
3  *
4  * Copyright (c) 1997, 1998
5  *	Sleepycat Software.  All rights reserved.
6  */
7 
8 #include "config.h"
9 
10 #ifndef lint
11 static const char sccsid[] = "@(#)os_dir.c	10.19 (Sleepycat) 10/12/98";
12 #endif /* not lint */
13 
14 #ifndef NO_SYSTEM_INCLUDES
15 #include <sys/types.h>
16 
17 #if HAVE_DIRENT_H
18 # include <dirent.h>
19 # define NAMLEN(dirent) strlen((dirent)->d_name)
20 #else
21 # define dirent direct
22 # define NAMLEN(dirent) (dirent)->d_namlen
23 # if HAVE_SYS_NDIR_H
24 #  include <sys/ndir.h>
25 # endif
26 # if HAVE_SYS_DIR_H
27 #  include <sys/dir.h>
28 # endif
29 # if HAVE_NDIR_H
30 #  include <ndir.h>
31 # endif
32 #endif
33 
34 #include <errno.h>
35 #endif
36 
37 #include "db_int.h"
38 #include "os_jump.h"
39 
40 /*
41  * __os_dirlist --
42  *	Return a list of the files in a directory.
43  *
44  * PUBLIC: int __os_dirlist __P((const char *, char ***, int *));
45  */
46 int
__os_dirlist(dir,namesp,cntp)47 __os_dirlist(dir, namesp, cntp)
48 	const char *dir;
49 	char ***namesp;
50 	int *cntp;
51 {
52 	struct dirent *dp;
53 	DIR *dirp;
54 	int arraysz, cnt, ret;
55 	char **names;
56 
57 	if (__db_jump.j_dirlist != NULL)
58 		return (__db_jump.j_dirlist(dir, namesp, cntp));
59 
60 	if ((dirp = opendir(dir)) == NULL)
61 		return (errno);
62 	names = NULL;
63 	for (arraysz = cnt = 0; (dp = readdir(dirp)) != NULL; ++cnt) {
64 		if (cnt >= arraysz) {
65 			arraysz += 100;
66 			if ((ret = __os_realloc(&names,
67 			    arraysz * sizeof(names[0]))) != 0)
68 				goto nomem;
69 		}
70 		if ((ret = __os_strdup(dp->d_name, &names[cnt])) != 0)
71 			goto nomem;
72 	}
73 	(void)closedir(dirp);
74 
75 	*namesp = names;
76 	*cntp = cnt;
77 	return (0);
78 
79 nomem:	if (names != NULL)
80 		__os_dirfree(names, cnt);
81 	return (ret);
82 }
83 
84 /*
85  * __os_dirfree --
86  *	Free the list of files.
87  *
88  * PUBLIC: void __os_dirfree __P((char **, int));
89  */
90 void
__os_dirfree(names,cnt)91 __os_dirfree(names, cnt)
92 	char **names;
93 	int cnt;
94 {
95 	if (__db_jump.j_dirfree != NULL)
96 		__db_jump.j_dirfree(names, cnt);
97 
98 	while (cnt > 0)
99 		__os_free(names[--cnt], 0);
100 	__os_free(names, 0);
101 }
102