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29 * From: @(#)scandir.c 8.3 (Berkeley) 1/2/94
30 * From: FreeBSD: head/lib/libc/gen/scandir.c 317372 2017-04-24 14:56:41Z pfg
33 #include <sys/cdefs.h>
35 * Scan the directory dirname calling select to make a list of selected
36 * directory entries then sort using qsort and compare routine dcomp.
37 * Returns the number of entries and a pointer to a list of pointers to
38 * struct dirent (through namelist). Returns -1 if there were any errors.
41 #include "namespace.h"
42 #define _WANT_FREEBSD11_DIRENT
46 #include "un-namespace.h"
48 #include "gen-compat.h"
51 * scandir_b@FBSD_1.4 was never exported from libc.so.7 due to a
52 * mistake, so there is no use of exporting it now with some earlier
53 * symbol version. As result, we do not need to implement compat
54 * function freebsd11_scandir_b().
57 #define SELECT(x) select(x)
59 static int freebsd11_scandir_thunk_cmp(const void *p1, const void *p2,
63 freebsd11_scandir(const char *dirname, struct freebsd11_dirent ***namelist,
64 int (*select)(const struct freebsd11_dirent *),
65 int (*dcomp)(const struct freebsd11_dirent **,
66 const struct freebsd11_dirent **))
68 struct freebsd11_dirent *d, *p, **names = NULL;
69 size_t arraysz, numitems;
72 if ((dirp = opendir(dirname)) == NULL)
76 arraysz = 32; /* initial estimate of the array size */
77 names = (struct freebsd11_dirent **)malloc(
78 arraysz * sizeof(struct freebsd11_dirent *));
82 while ((d = freebsd11_readdir(dirp)) != NULL) {
83 if (select != NULL && !SELECT(d))
84 continue; /* just selected names */
86 * Make a minimum size copy of the data
88 p = (struct freebsd11_dirent *)malloc(FREEBSD11_DIRSIZ(d));
91 p->d_fileno = d->d_fileno;
92 p->d_type = d->d_type;
93 p->d_reclen = d->d_reclen;
94 p->d_namlen = d->d_namlen;
95 bcopy(d->d_name, p->d_name, p->d_namlen + 1);
97 * Check to make sure the array has space left and
98 * realloc the maximum size.
100 if (numitems >= arraysz) {
101 struct freebsd11_dirent **names2;
103 names2 = reallocarray(names, arraysz,
104 2 * sizeof(struct freebsd11_dirent *));
105 if (names2 == NULL) {
112 names[numitems++] = p;
115 if (numitems && dcomp != NULL)
116 qsort_r(names, numitems, sizeof(struct freebsd11_dirent *),
117 freebsd11_scandir_thunk_cmp, &dcomp);
123 free(names[--numitems]);
130 * Alphabetic order comparison routine for those who want it.
131 * POSIX 2008 requires that alphasort() uses strcoll().
134 freebsd11_alphasort(const struct freebsd11_dirent **d1,
135 const struct freebsd11_dirent **d2)
138 return (strcoll((*d1)->d_name, (*d2)->d_name));
142 freebsd11_scandir_thunk_cmp(const void *p1, const void *p2, void *thunk)
144 int (*dc)(const struct freebsd11_dirent **, const struct
145 freebsd11_dirent **);
147 dc = *(int (**)(const struct freebsd11_dirent **,
148 const struct freebsd11_dirent **))thunk;
149 return (dc((const struct freebsd11_dirent **)p1,
150 (const struct freebsd11_dirent **)p2));
153 __sym_compat(alphasort, freebsd11_alphasort, FBSD_1.0);
154 __sym_compat(scandir, freebsd11_scandir, FBSD_1.0);