18a16b7a1SPedro F. Giffuni /*- 28a16b7a1SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 38a16b7a1SPedro F. Giffuni * 458f0484fSRodney W. Grimes * Copyright (c) 1983, 1993 558f0484fSRodney W. Grimes * The Regents of the University of California. All rights reserved. 658f0484fSRodney W. Grimes * 758f0484fSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 858f0484fSRodney W. Grimes * modification, are permitted provided that the following conditions 958f0484fSRodney W. Grimes * are met: 1058f0484fSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 1158f0484fSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 1258f0484fSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 1358f0484fSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 1458f0484fSRodney W. Grimes * documentation and/or other materials provided with the distribution. 15fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 1658f0484fSRodney W. Grimes * may be used to endorse or promote products derived from this software 1758f0484fSRodney W. Grimes * without specific prior written permission. 1858f0484fSRodney W. Grimes * 1958f0484fSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2058f0484fSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2158f0484fSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2258f0484fSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2358f0484fSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2458f0484fSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2558f0484fSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2658f0484fSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2758f0484fSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2858f0484fSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2958f0484fSRodney W. Grimes * SUCH DAMAGE. 3058f0484fSRodney W. Grimes */ 3158f0484fSRodney W. Grimes 32b231cb39SDavid E. O'Brien #include <sys/cdefs.h> 33c1920558SJohn Baldwin __SCCSID("@(#)scandir.c 8.3 (Berkeley) 1/2/94"); 34b231cb39SDavid E. O'Brien __FBSDID("$FreeBSD$"); 3558f0484fSRodney W. Grimes 3658f0484fSRodney W. Grimes /* 3758f0484fSRodney W. Grimes * Scan the directory dirname calling select to make a list of selected 3858f0484fSRodney W. Grimes * directory entries then sort using qsort and compare routine dcomp. 3958f0484fSRodney W. Grimes * Returns the number of entries and a pointer to a list of pointers to 4058f0484fSRodney W. Grimes * struct dirent (through namelist). Returns -1 if there were any errors. 4158f0484fSRodney W. Grimes */ 4258f0484fSRodney W. Grimes 43d201fe46SDaniel Eischen #include "namespace.h" 4458f0484fSRodney W. Grimes #include <dirent.h> 4558f0484fSRodney W. Grimes #include <stdlib.h> 4658f0484fSRodney W. Grimes #include <string.h> 47d201fe46SDaniel Eischen #include "un-namespace.h" 4858f0484fSRodney W. Grimes 4946cdc140SDavid Chisnall #ifdef I_AM_SCANDIR_B 5046cdc140SDavid Chisnall #include "block_abi.h" 5146cdc140SDavid Chisnall #define SELECT(x) CALL_BLOCK(select, x) 5246cdc140SDavid Chisnall #ifndef __BLOCKS__ 53cc321ccdSKonstantin Belousov void qsort_b(void *, size_t, size_t, void *); 5446cdc140SDavid Chisnall #endif 5546cdc140SDavid Chisnall #else 5646cdc140SDavid Chisnall #define SELECT(x) select(x) 5746cdc140SDavid Chisnall #endif 5846cdc140SDavid Chisnall 59992bcb37SMateusz Guzik #ifndef I_AM_SCANDIR_B 60f5636f88SKonstantin Belousov static int alphasort_thunk(void *thunk, const void *p1, const void *p2); 61992bcb37SMateusz Guzik #endif 62f5636f88SKonstantin Belousov 6358f0484fSRodney W. Grimes int 6446cdc140SDavid Chisnall #ifdef I_AM_SCANDIR_B 6546cdc140SDavid Chisnall scandir_b(const char *dirname, struct dirent ***namelist, 6646cdc140SDavid Chisnall DECLARE_BLOCK(int, select, const struct dirent *), 6746cdc140SDavid Chisnall DECLARE_BLOCK(int, dcomp, const struct dirent **, const struct dirent **)) 6846cdc140SDavid Chisnall #else 694176dd52SKonstantin Belousov scandir(const char *dirname, struct dirent ***namelist, 704176dd52SKonstantin Belousov int (*select)(const struct dirent *), int (*dcomp)(const struct dirent **, 714176dd52SKonstantin Belousov const struct dirent **)) 7246cdc140SDavid Chisnall #endif 7358f0484fSRodney W. Grimes { 74b231cb39SDavid E. O'Brien struct dirent *d, *p, **names = NULL; 755f2bd3bdSPedro F. Giffuni size_t arraysz, numitems; 7658f0484fSRodney W. Grimes DIR *dirp; 7758f0484fSRodney W. Grimes 7858f0484fSRodney W. Grimes if ((dirp = opendir(dirname)) == NULL) 7958f0484fSRodney W. Grimes return(-1); 8058f0484fSRodney W. Grimes 810a8ff54eSConrad Meyer numitems = 0; 8218798c64SDavid Schultz arraysz = 32; /* initial estimate of the array size */ 8358f0484fSRodney W. Grimes names = (struct dirent **)malloc(arraysz * sizeof(struct dirent *)); 8458f0484fSRodney W. Grimes if (names == NULL) 8529595ffdSJulian Elischer goto fail; 8658f0484fSRodney W. Grimes 8758f0484fSRodney W. Grimes while ((d = readdir(dirp)) != NULL) { 8846cdc140SDavid Chisnall if (select != NULL && !SELECT(d)) 8958f0484fSRodney W. Grimes continue; /* just selected names */ 9058f0484fSRodney W. Grimes /* 9158f0484fSRodney W. Grimes * Make a minimum size copy of the data 9258f0484fSRodney W. Grimes */ 9369921123SKonstantin Belousov p = (struct dirent *)malloc(_GENERIC_DIRSIZ(d)); 9458f0484fSRodney W. Grimes if (p == NULL) 9529595ffdSJulian Elischer goto fail; 96e169c667SPoul-Henning Kamp p->d_fileno = d->d_fileno; 97e169c667SPoul-Henning Kamp p->d_type = d->d_type; 9858f0484fSRodney W. Grimes p->d_reclen = d->d_reclen; 9958f0484fSRodney W. Grimes p->d_namlen = d->d_namlen; 10058f0484fSRodney W. Grimes bcopy(d->d_name, p->d_name, p->d_namlen + 1); 10158f0484fSRodney W. Grimes /* 10258f0484fSRodney W. Grimes * Check to make sure the array has space left and 10358f0484fSRodney W. Grimes * realloc the maximum size. 10458f0484fSRodney W. Grimes */ 10556362c6fSPedro F. Giffuni if (numitems >= arraysz) { 10629595ffdSJulian Elischer struct dirent **names2; 10729595ffdSJulian Elischer 1089f36610fSPedro F. Giffuni names2 = reallocarray(names, arraysz, 1099f36610fSPedro F. Giffuni 2 * sizeof(struct dirent *)); 11029595ffdSJulian Elischer if (names2 == NULL) { 11129595ffdSJulian Elischer free(p); 11229595ffdSJulian Elischer goto fail; 11358f0484fSRodney W. Grimes } 11429595ffdSJulian Elischer names = names2; 11518798c64SDavid Schultz arraysz *= 2; 11629595ffdSJulian Elischer } 11756362c6fSPedro F. Giffuni names[numitems++] = p; 11858f0484fSRodney W. Grimes } 11958f0484fSRodney W. Grimes closedir(dirp); 12056362c6fSPedro F. Giffuni if (numitems && dcomp != NULL) 12146cdc140SDavid Chisnall #ifdef I_AM_SCANDIR_B 12256362c6fSPedro F. Giffuni qsort_b(names, numitems, sizeof(struct dirent *), (void*)dcomp); 12346cdc140SDavid Chisnall #else 12456362c6fSPedro F. Giffuni qsort_r(names, numitems, sizeof(struct dirent *), 125f5636f88SKonstantin Belousov &dcomp, alphasort_thunk); 12646cdc140SDavid Chisnall #endif 12758f0484fSRodney W. Grimes *namelist = names; 12856362c6fSPedro F. Giffuni return (numitems); 12929595ffdSJulian Elischer 13029595ffdSJulian Elischer fail: 13156362c6fSPedro F. Giffuni while (numitems > 0) 13256362c6fSPedro F. Giffuni free(names[--numitems]); 13329595ffdSJulian Elischer free(names); 13429595ffdSJulian Elischer closedir(dirp); 1354176dd52SKonstantin Belousov return (-1); 13658f0484fSRodney W. Grimes } 13758f0484fSRodney W. Grimes 138cc321ccdSKonstantin Belousov #ifndef I_AM_SCANDIR_B 13958f0484fSRodney W. Grimes /* 14058f0484fSRodney W. Grimes * Alphabetic order comparison routine for those who want it. 1415fc5e42aSAndrey A. Chernov * POSIX 2008 requires that alphasort() uses strcoll(). 14258f0484fSRodney W. Grimes */ 14358f0484fSRodney W. Grimes int 1444176dd52SKonstantin Belousov alphasort(const struct dirent **d1, const struct dirent **d2) 14558f0484fSRodney W. Grimes { 1464176dd52SKonstantin Belousov 147dcdafd0eSAndrey A. Chernov return (strcoll((*d1)->d_name, (*d2)->d_name)); 14858f0484fSRodney W. Grimes } 149f5636f88SKonstantin Belousov 150f5636f88SKonstantin Belousov static int 151f5636f88SKonstantin Belousov alphasort_thunk(void *thunk, const void *p1, const void *p2) 152f5636f88SKonstantin Belousov { 153f5636f88SKonstantin Belousov int (*dc)(const struct dirent **, const struct dirent **); 154f5636f88SKonstantin Belousov 155f5636f88SKonstantin Belousov dc = *(int (**)(const struct dirent **, const struct dirent **))thunk; 156f5636f88SKonstantin Belousov return (dc((const struct dirent **)p1, (const struct dirent **)p2)); 157f5636f88SKonstantin Belousov } 158cc321ccdSKonstantin Belousov #endif 159