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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>
34 __FBSDID("$FreeBSD$");
37 * Scan the directory dirname calling select to make a list of selected
38 * directory entries then sort using qsort and compare routine dcomp.
39 * Returns the number of entries and a pointer to a list of pointers to
40 * struct dirent (through namelist). Returns -1 if there were any errors.
43 #include "namespace.h"
44 #define _WANT_FREEBSD11_DIRENT
48 #include "un-namespace.h"
50 #include "gen-compat.h"
53 * scandir_b@FBSD_1.4 was never exported from libc.so.7 due to a
54 * mistake, so there is no use of exporting it now with some earlier
55 * symbol version. As result, we do not need to implement compat
56 * function freebsd11_scandir_b().
59 #define SELECT(x) select(x)
61 static int freebsd11_alphasort_thunk(void *thunk, const void *p1,
65 freebsd11_scandir(const char *dirname, struct freebsd11_dirent ***namelist,
66 int (*select)(const struct freebsd11_dirent *),
67 int (*dcomp)(const struct freebsd11_dirent **,
68 const struct freebsd11_dirent **))
70 struct freebsd11_dirent *d, *p, **names = NULL;
71 size_t arraysz, numitems;
74 if ((dirp = opendir(dirname)) == NULL)
78 arraysz = 32; /* initial estimate of the array size */
79 names = (struct freebsd11_dirent **)malloc(
80 arraysz * sizeof(struct freebsd11_dirent *));
84 while ((d = freebsd11_readdir(dirp)) != NULL) {
85 if (select != NULL && !SELECT(d))
86 continue; /* just selected names */
88 * Make a minimum size copy of the data
90 p = (struct freebsd11_dirent *)malloc(FREEBSD11_DIRSIZ(d));
93 p->d_fileno = d->d_fileno;
94 p->d_type = d->d_type;
95 p->d_reclen = d->d_reclen;
96 p->d_namlen = d->d_namlen;
97 bcopy(d->d_name, p->d_name, p->d_namlen + 1);
99 * Check to make sure the array has space left and
100 * realloc the maximum size.
102 if (numitems >= arraysz) {
103 struct freebsd11_dirent **names2;
105 names2 = reallocarray(names, arraysz,
106 2 * sizeof(struct freebsd11_dirent *));
107 if (names2 == NULL) {
114 names[numitems++] = p;
117 if (numitems && dcomp != NULL)
118 qsort_r(names, numitems, sizeof(struct freebsd11_dirent *),
119 &dcomp, freebsd11_alphasort_thunk);
125 free(names[--numitems]);
132 * Alphabetic order comparison routine for those who want it.
133 * POSIX 2008 requires that alphasort() uses strcoll().
136 freebsd11_alphasort(const struct freebsd11_dirent **d1,
137 const struct freebsd11_dirent **d2)
140 return (strcoll((*d1)->d_name, (*d2)->d_name));
144 freebsd11_alphasort_thunk(void *thunk, const void *p1, const void *p2)
146 int (*dc)(const struct freebsd11_dirent **, const struct
147 freebsd11_dirent **);
149 dc = *(int (**)(const struct freebsd11_dirent **,
150 const struct freebsd11_dirent **))thunk;
151 return (dc((const struct freebsd11_dirent **)p1,
152 (const struct freebsd11_dirent **)p2));
155 __sym_compat(alphasort, freebsd11_alphasort, FBSD_1.0);
156 __sym_compat(scandir, freebsd11_scandir, FBSD_1.0);