116 lines
2.4 KiB
C
116 lines
2.4 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2018 K. Lange
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*
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* du - calculate file size usage
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*
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* TODO: Should use st_blocks, but we don't set that in the kernel yet?
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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static int human = 0;
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static int all = 1;
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static uint64_t count_thing(char * tmp);
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static int print_human_readable_size(char * _out, size_t s) {
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if (s >= 1<<20) {
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size_t t = s / (1 << 20);
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return sprintf(_out, "%d.%1dM", (int)t, (int)(s - t * (1 << 20)) / ((1 << 20) / 10));
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} else if (s >= 1<<10) {
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size_t t = s / (1 << 10);
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return sprintf(_out, "%d.%1dK", (int)t, (int)(s - t * (1 << 10)) / ((1 << 10) / 10));
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} else {
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return sprintf(_out, "%d", (int)s);
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}
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}
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static void print_size(uint64_t size, char * name) {
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char sizes[8];
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if (!human) {
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sprintf(sizes, "%7llu", size/1024LLU);
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} else {
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print_human_readable_size(sizes, size);
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}
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fprintf(stdout, "%7s %s\n", sizes, name);
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}
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static uint64_t count_directory(char * source) {
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DIR * dirp = opendir(source);
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if (dirp == NULL) {
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//fprintf(stderr, "could not open %s\n", source);
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return 0;
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}
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uint64_t total = 0;
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struct dirent * ent = readdir(dirp);
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while (ent != NULL) {
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if (!strcmp(ent->d_name,".") || !strcmp(ent->d_name,"..")) {
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ent = readdir(dirp);
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continue;
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}
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char tmp[strlen(source)+strlen(ent->d_name)+2];
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sprintf(tmp, "%s/%s", source, ent->d_name);
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total += count_thing(tmp);
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ent = readdir(dirp);
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}
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closedir(dirp);
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if (all) {
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print_size(total, source);
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}
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return total;
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}
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static uint64_t count_thing(char * tmp) {
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struct stat statbuf;
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lstat(tmp,&statbuf);
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if (S_ISDIR(statbuf.st_mode)) {
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return count_directory(tmp);
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} else {
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return statbuf.st_size;
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}
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}
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int main(int argc, char * argv[]) {
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int opt;
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while ((opt = getopt(argc, argv, "hs")) != -1) {
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switch (opt) {
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case 'h': /* human readable */
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human = 1;
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break;
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case 's': /* summary */
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all = 0;
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break;
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default:
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fprintf(stderr, "rm: unrecognized option '%c'\n", opt);
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break;
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}
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}
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int ret = 0;
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for (int i = optind; i < argc; ++i) {
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uint64_t total = count_thing(argv[i]);
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if (!all) {
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print_size(total, argv[i]);
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}
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}
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return ret;
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}
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