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28 * From: FreeBSD: head/lib/libc/gen/scandir.c 317372 2017-04-24 14:56:41Z pfg
32 * Scan the directory dirname calling select to make a list of selected
33 * directory entries then sort using qsort and compare routine dcomp.
34 * Returns the number of entries and a pointer to a list of pointers to
35 * struct dirent (through namelist). Returns -1 if there were any errors.
38 #include "namespace.h"
39 #define _WANT_FREEBSD11_DIRENT
43 #include "un-namespace.h"
45 #include "gen-compat.h"
48 * scandir_b@FBSD_1.4 was never exported from libc.so.7 due to a
49 * mistake, so there is no use of exporting it now with some earlier
50 * symbol version. As result, we do not need to implement compat
51 * function freebsd11_scandir_b().
54 #define SELECT(x) select(x)
56 static int freebsd11_scandir_thunk_cmp(const void *p1, const void *p2,
60 freebsd11_scandir(const char *dirname, struct freebsd11_dirent ***namelist,
61 int (*select)(const struct freebsd11_dirent *),
62 int (*dcomp)(const struct freebsd11_dirent **,
63 const struct freebsd11_dirent **))
65 struct freebsd11_dirent *d, *p, **names = NULL;
66 size_t arraysz, numitems;
69 if ((dirp = opendir(dirname)) == NULL)
73 arraysz = 32; /* initial estimate of the array size */
74 names = (struct freebsd11_dirent **)malloc(
75 arraysz * sizeof(struct freebsd11_dirent *));
79 while ((d = freebsd11_readdir(dirp)) != NULL) {
80 if (select != NULL && !SELECT(d))
81 continue; /* just selected names */
83 * Make a minimum size copy of the data
85 p = (struct freebsd11_dirent *)malloc(FREEBSD11_DIRSIZ(d));
88 p->d_fileno = d->d_fileno;
89 p->d_type = d->d_type;
90 p->d_reclen = d->d_reclen;
91 p->d_namlen = d->d_namlen;
92 bcopy(d->d_name, p->d_name, p->d_namlen + 1);
94 * Check to make sure the array has space left and
95 * realloc the maximum size.
97 if (numitems >= arraysz) {
98 struct freebsd11_dirent **names2;
100 names2 = reallocarray(names, arraysz,
101 2 * sizeof(struct freebsd11_dirent *));
102 if (names2 == NULL) {
109 names[numitems++] = p;
112 if (numitems && dcomp != NULL)
113 qsort_r(names, numitems, sizeof(struct freebsd11_dirent *),
114 freebsd11_scandir_thunk_cmp, &dcomp);
120 free(names[--numitems]);
127 * Alphabetic order comparison routine for those who want it.
128 * POSIX 2008 requires that alphasort() uses strcoll().
131 freebsd11_alphasort(const struct freebsd11_dirent **d1,
132 const struct freebsd11_dirent **d2)
135 return (strcoll((*d1)->d_name, (*d2)->d_name));
139 freebsd11_scandir_thunk_cmp(const void *p1, const void *p2, void *thunk)
141 int (*dc)(const struct freebsd11_dirent **, const struct
142 freebsd11_dirent **);
144 dc = *(int (**)(const struct freebsd11_dirent **,
145 const struct freebsd11_dirent **))thunk;
146 return (dc((const struct freebsd11_dirent **)p1,
147 (const struct freebsd11_dirent **)p2));
150 __sym_compat(alphasort, freebsd11_alphasort, FBSD_1.0);
151 __sym_compat(scandir, freebsd11_scandir, FBSD_1.0);