| [821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <string.h>
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| 12 | #include <dirent.h>
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| 13 | #include <sys/stat.h>
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| 14 | #include <stdlib.h> /* free() */
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| 15 | #include "libbb.h"
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| 16 |
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| 17 | #undef DEBUG_RECURS_ACTION
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| 18 |
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| 19 |
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| 20 | /*
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| 21 | * Walk down all the directories under the specified
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| 22 | * location, and do something (something specified
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| 23 | * by the fileAction and dirAction function pointers).
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| 24 | *
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| 25 | * Unfortunately, while nftw(3) could replace this and reduce
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| 26 | * code size a bit, nftw() wasn't supported before GNU libc 2.1,
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| 27 | * and so isn't sufficiently portable to take over since glibc2.1
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| 28 | * is so stinking huge.
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| 29 | */
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| 30 | int recursive_action(const char *fileName,
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| 31 | int recurse, int followLinks, int depthFirst,
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| 32 | int (*fileAction) (const char *fileName,
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| 33 | struct stat * statbuf,
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| 34 | void* userData),
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| 35 | int (*dirAction) (const char *fileName,
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| 36 | struct stat * statbuf,
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| 37 | void* userData),
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| 38 | void* userData)
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| 39 | {
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| 40 | int status;
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| 41 | struct stat statbuf;
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| 42 | struct dirent *next;
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| 43 |
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| 44 | if (followLinks)
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| 45 | status = stat(fileName, &statbuf);
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| 46 | else
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| 47 | status = lstat(fileName, &statbuf);
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| 48 |
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| 49 | if (status < 0) {
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| 50 | #ifdef DEBUG_RECURS_ACTION
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| 51 | bb_error_msg("status=%d followLinks=%d TRUE=%d",
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| 52 | status, followLinks, TRUE);
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| 53 | #endif
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| 54 | bb_perror_msg("%s", fileName);
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| 55 | return FALSE;
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| 56 | }
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| 57 |
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| 58 | if (! followLinks && (S_ISLNK(statbuf.st_mode))) {
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| 59 | if (fileAction == NULL)
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| 60 | return TRUE;
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| 61 | else
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| 62 | return fileAction(fileName, &statbuf, userData);
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| 63 | }
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| 64 |
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| 65 | if (! recurse) {
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| 66 | if (S_ISDIR(statbuf.st_mode)) {
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| 67 | if (dirAction != NULL)
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| 68 | return (dirAction(fileName, &statbuf, userData));
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| 69 | else
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| 70 | return TRUE;
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| 71 | }
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| 72 | }
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| 73 |
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| 74 | if (S_ISDIR(statbuf.st_mode)) {
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| 75 | DIR *dir;
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| 76 |
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| 77 | if (dirAction != NULL && ! depthFirst) {
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| 78 | status = dirAction(fileName, &statbuf, userData);
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| 79 | if (! status) {
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| 80 | bb_perror_msg("%s", fileName);
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| 81 | return FALSE;
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| 82 | } else if (status == SKIP)
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| 83 | return TRUE;
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| 84 | }
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| 85 | dir = bb_opendir(fileName);
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| 86 | if (!dir) {
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| 87 | return FALSE;
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| 88 | }
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| 89 | status = TRUE;
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| 90 | while ((next = readdir(dir)) != NULL) {
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| 91 | char *nextFile;
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| 92 |
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| 93 | nextFile = concat_subpath_file(fileName, next->d_name);
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| 94 | if(nextFile == NULL)
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| 95 | continue;
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| 96 | if (! recursive_action(nextFile, TRUE, followLinks, depthFirst,
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| 97 | fileAction, dirAction, userData)) {
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| 98 | status = FALSE;
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| 99 | }
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| 100 | free(nextFile);
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| 101 | }
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| 102 | closedir(dir);
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| 103 | if (dirAction != NULL && depthFirst) {
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| 104 | if (! dirAction(fileName, &statbuf, userData)) {
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| 105 | bb_perror_msg("%s", fileName);
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| 106 | return FALSE;
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| 107 | }
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| 108 | }
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| 109 | if (! status)
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| 110 | return FALSE;
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| 111 | } else {
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| 112 | if (fileAction == NULL)
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| 113 | return TRUE;
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| 114 | else
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| 115 | return fileAction(fileName, &statbuf, userData);
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| 116 | }
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| 117 | return TRUE;
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| 118 | }
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