Switch to toybox ls. (7b071e53) · Commits · e / os / android_system_core

toolbox/Android.mk

+0 −1

Original line number	Original line	Diff line number	Diff line
	@@ -45,7 +45,6 @@ OUR_TOOLS := \
	ioctl \		ioctl \
	ionice \		ionice \
	log \		log \
	ls \
	lsof \		lsof \
	mount \		mount \
	nandread \		nandread \

toolbox/ls.c

deleted100644 → 0

+0 −588

Original line number	Original line	Diff line number	Diff line
	#include <dirent.h>
	#include <errno.h>
	#include <grp.h>
	#include <limits.h>
	#include <pwd.h>
	#include <stddef.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <sys/stat.h>
	#include <sys/sysmacros.h>
	#include <sys/types.h>
	#include <time.h>
	#include <unistd.h>

	#include <selinux/selinux.h>

	// simple dynamic array of strings.
	typedef struct {
	int count;
	int capacity;
	void** items;
	} strlist_t;

	#define STRLIST_INITIALIZER { 0, 0, NULL }

	/* Used to iterate over a strlist_t
	* _list :: pointer to strlist_t object
	* _item :: name of local variable name defined within the loop with
	* type 'char*'
	* _stmnt :: C statement executed in each iteration
	*
	* This macro is only intended for simple uses. Do not add or remove items
	* to/from the list during iteration.
	*/
	#define STRLIST_FOREACH(_list,_item,_stmnt) \
	do { \
	int _nn_##__LINE__ = 0; \
	for (;_nn_##__LINE__ < (_list)->count; ++ _nn_##__LINE__) { \
	char* _item = (char*)(_list)->items[_nn_##__LINE__]; \
	_stmnt; \
	} \
	} while (0)

	static void dynarray_reserve_more( strlist_t *a, int count ) {
	int old_cap = a->capacity;
	int new_cap = old_cap;
	const int max_cap = INT_MAX/sizeof(void*);
	void** new_items;
	int new_count = a->count + count;

	if (count <= 0)
	return;

	if (count > max_cap - a->count)
	abort();

	new_count = a->count + count;

	while (new_cap < new_count) {
	old_cap = new_cap;
	new_cap += (new_cap >> 2) + 4;
	if (new_cap < old_cap \|\| new_cap > max_cap) {
	new_cap = max_cap;
	}
	}
	new_items = realloc(a->items, new_capsizeof(void));
	if (new_items == NULL)
	abort();

	a->items = new_items;
	a->capacity = new_cap;
	}

	void strlist_init( strlist_t *list ) {
	list->count = list->capacity = 0;
	list->items = NULL;
	}

	// append a new string made of the first 'slen' characters from 'str'
	// followed by a trailing zero.
	void strlist_append_b( strlist_t list, const void str, size_t slen ) {
	char *copy = malloc(slen+1);
	memcpy(copy, str, slen);
	copy[slen] = '\0';
	if (list->count >= list->capacity)
	dynarray_reserve_more(list, 1);
	list->items[list->count++] = copy;
	}

	// append the copy of a given input string to a strlist_t.
	void strlist_append_dup( strlist_t list, const char str) {
	strlist_append_b(list, str, strlen(str));
	}

	// note: strlist_done will free all the strings owned by the list.
	void strlist_done( strlist_t *list ) {
	STRLIST_FOREACH(list, string, free(string));
	free(list->items);
	list->items = NULL;
	list->count = list->capacity = 0;
	}

	static int strlist_compare_strings(const void* a, const void* b) {
	const char sa = (const char **)a;
	const char sb = (const char **)b;
	return strcmp(sa, sb);
	}

	/* sort the strings in a given list (using strcmp) */
	void strlist_sort( strlist_t *list ) {
	if (list->count > 0) {
	qsort(list->items, (size_t)list->count, sizeof(void*), strlist_compare_strings);
	}
	}


	// bits for flags argument
	#define LIST_LONG (1 << 0)
	#define LIST_ALL (1 << 1)
	#define LIST_RECURSIVE (1 << 2)
	#define LIST_DIRECTORIES (1 << 3)
	#define LIST_SIZE (1 << 4)
	#define LIST_LONG_NUMERIC (1 << 5)
	#define LIST_CLASSIFY (1 << 6)
	#define LIST_MACLABEL (1 << 7)
	#define LIST_INODE (1 << 8)

	// fwd
	static int listpath(const char *name, int flags);

	static char mode2kind(mode_t mode)
	{
	switch(mode & S_IFMT){
	case S_IFSOCK: return 's';
	case S_IFLNK: return 'l';
	case S_IFREG: return '-';
	case S_IFDIR: return 'd';
	case S_IFBLK: return 'b';
	case S_IFCHR: return 'c';
	case S_IFIFO: return 'p';
	default: return '?';
	}
	}

	void strmode(mode_t mode, char *out)
	{
	*out++ = mode2kind(mode);

	*out++ = (mode & 0400) ? 'r' : '-';
	*out++ = (mode & 0200) ? 'w' : '-';
	if(mode & 04000) {
	*out++ = (mode & 0100) ? 's' : 'S';
	} else {
	*out++ = (mode & 0100) ? 'x' : '-';
	}
	*out++ = (mode & 040) ? 'r' : '-';
	*out++ = (mode & 020) ? 'w' : '-';
	if(mode & 02000) {
	*out++ = (mode & 010) ? 's' : 'S';
	} else {
	*out++ = (mode & 010) ? 'x' : '-';
	}
	*out++ = (mode & 04) ? 'r' : '-';
	*out++ = (mode & 02) ? 'w' : '-';
	if(mode & 01000) {
	*out++ = (mode & 01) ? 't' : 'T';
	} else {
	*out++ = (mode & 01) ? 'x' : '-';
	}
	*out = 0;
	}

	static void user2str(uid_t uid, char *out, size_t out_size)
	{
	struct passwd *pw = getpwuid(uid);
	if(pw) {
	strlcpy(out, pw->pw_name, out_size);
	} else {
	snprintf(out, out_size, "%d", uid);
	}
	}

	static void group2str(gid_t gid, char *out, size_t out_size)
	{
	struct group *gr = getgrgid(gid);
	if(gr) {
	strlcpy(out, gr->gr_name, out_size);
	} else {
	snprintf(out, out_size, "%d", gid);
	}
	}

	static int show_total_size(const char dirname, DIR d, int flags)
	{
	struct dirent *de;
	char tmp[1024];
	struct stat s;
	int sum = 0;

	/* run through the directory and sum up the file block sizes */
	while ((de = readdir(d)) != 0) {
	if (strcmp(de->d_name, ".") == 0 \|\| strcmp(de->d_name, "..") == 0)
	continue;
	if (de->d_name[0] == '.' && (flags & LIST_ALL) == 0)
	continue;

	if (strcmp(dirname, "/") == 0)
	snprintf(tmp, sizeof(tmp), "/%s", de->d_name);
	else
	snprintf(tmp, sizeof(tmp), "%s/%s", dirname, de->d_name);

	if (lstat(tmp, &s) < 0) {
	fprintf(stderr, "stat failed on %s: %s\n", tmp, strerror(errno));
	rewinddir(d);
	return -1;
	}

	sum += s.st_blocks / 2;
	}

	printf("total %d\n", sum);
	rewinddir(d);
	return 0;
	}

	static int listfile_size(const char path, const char filename, struct stat *s,
	int flags)
	{
	if(!s \|\| !path) {
	return -1;
	}

	/* blocks are 512 bytes, we want output to be KB */
	if ((flags & LIST_SIZE) != 0) {
	printf("%lld ", (long long)s->st_blocks / 2);
	}

	if ((flags & LIST_CLASSIFY) != 0) {
	char filetype = mode2kind(s->st_mode);
	if (filetype != 'l') {
	printf("%c ", filetype);
	} else {
	struct stat link_dest;
	if (!stat(path, &link_dest)) {
	printf("l%c ", mode2kind(link_dest.st_mode));
	} else {
	fprintf(stderr, "stat '%s' failed: %s\n", path, strerror(errno));
	printf("l? ");
	}
	}
	}

	printf("%s\n", filename);

	return 0;
	}

	static int listfile_long(const char path, struct stat s, int flags)
	{
	char date[32];
	char mode[16];
	char user[32];
	char group[32];
	const char *name;

	if(!s \|\| !path) {
	return -1;
	}

	/* name is anything after the final '/', or the whole path if none*/
	name = strrchr(path, '/');
	if(name == 0) {
	name = path;
	} else {
	name++;
	}

	strmode(s->st_mode, mode);
	if (flags & LIST_LONG_NUMERIC) {
	snprintf(user, sizeof(user), "%u", s->st_uid);
	snprintf(group, sizeof(group), "%u", s->st_gid);
	} else {
	user2str(s->st_uid, user, sizeof(user));
	group2str(s->st_gid, group, sizeof(group));
	}

	strftime(date, 32, "%Y-%m-%d %H:%M", localtime((const time_t*)&s->st_mtime));
	date[31] = 0;

	// 12345678901234567890123456789012345678901234567890123456789012345678901234567890
	// MMMMMMMM UUUUUUUU GGGGGGGGG XXXXXXXX YYYY-MM-DD HH:MM NAME (->LINK)

	switch(s->st_mode & S_IFMT) {
	case S_IFBLK:
	case S_IFCHR:
	printf("%s %-8s %-8s %3d, %3d %s %s\n",
	mode, user, group,
	major(s->st_rdev), minor(s->st_rdev),
	date, name);
	break;
	case S_IFREG:
	printf("%s %-8s %-8s %8lld %s %s\n",
	mode, user, group, (long long)s->st_size, date, name);
	break;
	case S_IFLNK: {
	char linkto[256];
	ssize_t len;

	len = readlink(path, linkto, 256);
	if(len < 0) return -1;

	if(len > 255) {
	linkto[252] = '.';
	linkto[253] = '.';
	linkto[254] = '.';
	linkto[255] = 0;
	} else {
	linkto[len] = 0;
	}

	printf("%s %-8s %-8s %s %s -> %s\n",
	mode, user, group, date, name, linkto);
	break;
	}
	default:
	printf("%s %-8s %-8s %s %s\n",
	mode, user, group, date, name);

	}
	return 0;
	}

	static int listfile_maclabel(const char path, struct stat s)
	{
	char mode[16];
	char user[32];
	char group[32];
	char *maclabel = NULL;
	const char *name;

	if(!s \|\| !path) {
	return -1;
	}

	/* name is anything after the final '/', or the whole path if none*/
	name = strrchr(path, '/');
	if(name == 0) {
	name = path;
	} else {
	name++;
	}

	lgetfilecon(path, &maclabel);
	if (!maclabel) {
	return -1;
	}

	strmode(s->st_mode, mode);
	user2str(s->st_uid, user, sizeof(user));
	group2str(s->st_gid, group, sizeof(group));

	switch(s->st_mode & S_IFMT) {
	case S_IFLNK: {
	char linkto[256];
	ssize_t len;

	len = readlink(path, linkto, sizeof(linkto));
	if(len < 0) return -1;

	if((size_t)len > sizeof(linkto)-1) {
	linkto[sizeof(linkto)-4] = '.';
	linkto[sizeof(linkto)-3] = '.';
	linkto[sizeof(linkto)-2] = '.';
	linkto[sizeof(linkto)-1] = 0;
	} else {
	linkto[len] = 0;
	}

	printf("%s %-8s %-8s %s %s -> %s\n",
	mode, user, group, maclabel, name, linkto);
	break;
	}
	default:
	printf("%s %-8s %-8s %s %s\n",
	mode, user, group, maclabel, name);

	}

	free(maclabel);

	return 0;
	}

	static int listfile(const char dirname, const char filename, int flags)
	{
	struct stat s;

	if ((flags & (LIST_LONG \| LIST_SIZE \| LIST_CLASSIFY \| LIST_MACLABEL \| LIST_INODE)) == 0) {
	printf("%s\n", filename);
	return 0;
	}

	char tmp[4096];
	const char* pathname = filename;

	if (dirname != NULL) {
	snprintf(tmp, sizeof(tmp), "%s/%s", dirname, filename);
	pathname = tmp;
	} else {
	pathname = filename;
	}

	if(lstat(pathname, &s) < 0) {
	fprintf(stderr, "lstat '%s' failed: %s\n", pathname, strerror(errno));
	return -1;
	}

	if(flags & LIST_INODE) {
	printf("%8llu ", (unsigned long long)s.st_ino);
	}

	if ((flags & LIST_MACLABEL) != 0) {
	return listfile_maclabel(pathname, &s);
	} else if ((flags & LIST_LONG) != 0) {
	return listfile_long(pathname, &s, flags);
	} else /((flags & LIST_SIZE) != 0)/ {
	return listfile_size(pathname, filename, &s, flags);
	}
	}

	static int listdir(const char *name, int flags)
	{
	char tmp[4096];
	DIR *d;
	struct dirent *de;
	strlist_t files = STRLIST_INITIALIZER;

	d = opendir(name);
	if(d == 0) {
	fprintf(stderr, "opendir failed, %s\n", strerror(errno));
	return -1;
	}

	if ((flags & LIST_SIZE) != 0) {
	show_total_size(name, d, flags);
	}

	while((de = readdir(d)) != 0){
	if (!strcmp(de->d_name, ".") \|\| !strcmp(de->d_name, "..")) continue;
	if(de->d_name[0] == '.' && (flags & LIST_ALL) == 0) continue;

	strlist_append_dup(&files, de->d_name);
	}

	strlist_sort(&files);
	STRLIST_FOREACH(&files, filename, listfile(name, filename, flags));
	strlist_done(&files);

	if (flags & LIST_RECURSIVE) {
	strlist_t subdirs = STRLIST_INITIALIZER;

	rewinddir(d);

	while ((de = readdir(d)) != 0) {
	struct stat s;
	int err;

	if (!strcmp(de->d_name, ".") \|\| !strcmp(de->d_name, ".."))
	continue;
	if (de->d_name[0] == '.' && (flags & LIST_ALL) == 0)
	continue;

	if (!strcmp(name, "/"))
	snprintf(tmp, sizeof(tmp), "/%s", de->d_name);
	else
	snprintf(tmp, sizeof(tmp), "%s/%s", name, de->d_name);

	/*
	* If the name ends in a '/', use stat() so we treat it like a
	* directory even if it's a symlink.
	*/
	if (tmp[strlen(tmp)-1] == '/')
	err = stat(tmp, &s);
	else
	err = lstat(tmp, &s);

	if (err < 0) {
	perror(tmp);
	closedir(d);
	return -1;
	}

	if (S_ISDIR(s.st_mode)) {
	strlist_append_dup(&subdirs, tmp);
	}
	}
	strlist_sort(&subdirs);
	STRLIST_FOREACH(&subdirs, path, {
	printf("\n%s:\n", path);
	listdir(path, flags);
	});
	strlist_done(&subdirs);
	}

	closedir(d);
	return 0;
	}

	static int listpath(const char *name, int flags)
	{
	struct stat s;
	int err;

	/*
	* If the name ends in a '/', use stat() so we treat it like a
	* directory even if it's a symlink.
	*/
	if (name[strlen(name)-1] == '/')
	err = stat(name, &s);
	else
	err = lstat(name, &s);

	if (err < 0) {
	perror(name);
	return -1;
	}

	if ((flags & LIST_DIRECTORIES) == 0 && S_ISDIR(s.st_mode)) {
	if (flags & LIST_RECURSIVE)
	printf("\n%s:\n", name);
	return listdir(name, flags);
	} else {
	/* yeah this calls stat() again*/
	return listfile(NULL, name, flags);
	}
	}

	int ls_main(int argc, char **argv)
	{
	int flags = 0;

	if(argc > 1) {
	int i;
	int err = 0;
	strlist_t files = STRLIST_INITIALIZER;

	for (i = 1; i < argc; i++) {
	if (argv[i][0] == '-') {
	/* an option ? */
	const char *arg = argv[i]+1;
	while (arg[0]) {
	switch (arg[0]) {
	case 'l': flags \|= LIST_LONG; break;
	case 'n': flags \|= LIST_LONG \| LIST_LONG_NUMERIC; break;
	case 's': flags \|= LIST_SIZE; break;
	case 'R': flags \|= LIST_RECURSIVE; break;
	case 'd': flags \|= LIST_DIRECTORIES; break;
	case 'Z': flags \|= LIST_MACLABEL; break;
	case 'a': flags \|= LIST_ALL; break;
	case 'F': flags \|= LIST_CLASSIFY; break;
	case 'i': flags \|= LIST_INODE; break;
	default:
	fprintf(stderr, "%s: Unknown option '-%c'. Aborting.\n", "ls", arg[0]);
	exit(1);
	}
	arg++;
	}
	} else {
	/* not an option ? */
	strlist_append_dup(&files, argv[i]);
	}
	}

	if (files.count > 0) {
	STRLIST_FOREACH(&files, path, {
	if (listpath(path, flags) != 0) {
	err = EXIT_FAILURE;
	}
	});
	strlist_done(&files);
	return err;
	}
	}

	// list working directory if no files or directories were specified
	return listpath(".", flags);
	}