Roger Knecht
20a4f70eca
Adds the tree program to list directories and files in a tree structure. function old new delta tree_print - 343 +343 scandir64 - 330 +330 scandir - 330 +330 tree_main - 86 +86 .rodata 105150 105228 +78 packed_usage 34511 34557 +46 alphasort64 - 31 +31 alphasort - 31 +31 strcoll - 5 +5 applet_names 2801 2806 +5 applet_main 1616 1620 +4 applet_suid 101 102 +1 applet_install_loc 202 203 +1 ------------------------------------------------------------------------------ (add/remove: 11/0 grow/shrink: 6/0 up/down: 1291/0) Total: 1291 bytes Signed-off-by: Roger Knecht <rknecht@pm.me> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
119 lines
2.6 KiB
C
119 lines
2.6 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Copyright (C) 2022 Roger Knecht <rknecht@pm.me>
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//config:config TREE
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//config: bool "tree (0.6 kb)"
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//config: default y
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//config: help
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//config: List files and directories in a tree structure.
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//applet:IF_TREE(APPLET(tree, BB_DIR_USR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_TREE) += tree.o
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//usage:#define tree_trivial_usage NOUSAGE_STR
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//usage:#define tree_full_usage ""
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#include "libbb.h"
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#include "common_bufsiz.h"
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#define prefix_buf bb_common_bufsiz1
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static void tree_print(unsigned count[2], const char* directory_name, char* prefix_pos)
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{
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struct dirent **entries;
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int index, size;
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// read directory entries
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size = scandir(directory_name, &entries, NULL, alphasort);
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if (size < 0) {
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fputs_stdout(directory_name);
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puts(" [error opening dir]");
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return;
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}
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// print directory name
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puts(directory_name);
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// switch to sub directory
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xchdir(directory_name);
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// print all directory entries
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for (index = 0; index < size;) {
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struct dirent *dirent = entries[index++];
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// filter hidden files and directories
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if (dirent->d_name[0] != '.') {
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int status;
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struct stat statBuf;
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//TODO: when -l is implemented, use stat, not lstat, if -l
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status = lstat(dirent->d_name, &statBuf);
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if (index == size) {
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strcpy(prefix_pos, "└── ");
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} else {
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strcpy(prefix_pos, "├── ");
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}
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fputs_stdout(prefix_buf);
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if (status == 0 && S_ISLNK(statBuf.st_mode)) {
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// handle symlink
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char* symlink_path = xmalloc_readlink(dirent->d_name);
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printf("%s -> %s\n", dirent->d_name, symlink_path);
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free(symlink_path);
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count[1]++;
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} else if (status == 0 && S_ISDIR(statBuf.st_mode)
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&& (prefix_pos - prefix_buf) < (COMMON_BUFSIZE - 16)
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) {
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// handle directory
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char* pos;
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if (index == size) {
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pos = stpcpy(prefix_pos, " ");
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} else {
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pos = stpcpy(prefix_pos, "│ ");
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}
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tree_print(count, dirent->d_name, pos);
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count[0]++;
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} else {
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// handle file
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puts(dirent->d_name);
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count[1]++;
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}
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}
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// release directory entry
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free(dirent);
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}
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// release directory array
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free(entries);
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// switch to parent directory
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xchdir("..");
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}
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int tree_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int tree_main(int argc UNUSED_PARAM, char **argv)
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{
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unsigned count[2] = { 0, 0 };
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setup_common_bufsiz();
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if (!argv[1])
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*argv-- = (char*)".";
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// list directories given as command line arguments
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while (*(++argv))
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tree_print(count, *argv, prefix_buf);
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// print statistic
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printf("\n%u directories, %u files\n", count[0], count[1]);
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return EXIT_SUCCESS;
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}
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