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#include <dirent.h>
#include <fcntl.h>
#include <getopt.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "util/versie.h"
static int max_depth = -1;
static bool show_hidden = false;
static bool dirs_only = false;
static void usage(FILE *f) {
fprintf(f,
"Gebruik: boom [OPTIES]... [STARTPUNTEN]...\n"
"\n"
"Geef inhoud van mapjes weer in een boom-achtig formaat.\n"
"\n"
" -a Alle bestanden worden weergegeven, ook al beginnen ze met een puntje\n"
" -m Geef alleen mapjes weer\n"
" -d DIEPTE Maximale diepte\n"
" -h Toon deze hulptekst\n"
" -V Toon versienummer\n");
}
// Returns pointer to argument array containing the starting points
static char** parse_options(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "amd:hV")) != -1) {
switch (opt) {
case 'a':
show_hidden = true;
break;
case 'm':
dirs_only = true;
break;
case 'd':
max_depth = atoi(optarg);
if (max_depth <= 0) {
fprintf(stderr, "boom: maximale diepte moet groter zijn dan 0\n");
exit(1);
}
break;
case 'h':
usage(stdout);
exit(0);
case 'V':
drukkedoos_print_versie(stdout);
exit(0);
case '?':
usage(stderr);
exit(1);
}
}
return argv + optind;
}
static int scandir_filterfunc(const struct dirent *ent) {
if (dirs_only && ent->d_type != DT_DIR) return 0;
if (!show_hidden && ent->d_name[0] == '.') return 0;
return 1;
}
static const char *branches[] = {
"├── ",
"└── ",
"│ ",
" "
};
// Contains indices into 'branches'
static int8_t prefix[PATH_MAX / 2 + 1];
// Buffer to store the target of a symlink in
static char linknamebuf[PATH_MAX];
static size_t total_dirs = 0;
static size_t total_files = 0;
static bool encountered_error = false;
static void print_prefix(int depth) {
for (int i = 0; i < depth; i++) {
printf("%s", branches[prefix[i]]);
}
}
// Pass -1 as parentdirfd if dirname is to be resolved relative to $PWD or is absolute.
static void boom(int parentdirfd, const char *dirname, unsigned depth) {
total_dirs++;
if (depth > (unsigned)max_depth) return;
struct dirent **list;
const int nitems =
parentdirfd == -1
? scandir(dirname, &list, scandir_filterfunc, alphasort)
: scandirat(parentdirfd, dirname, &list, scandir_filterfunc, alphasort);
if (nitems == -1) {
printf("%s [kon mapje niet openen]\n", dirname);
total_dirs--; // not a directory after all
encountered_error = true;
return;
}
const int dirfd = parentdirfd == -1
? open(dirname, O_DIRECTORY)
: openat(parentdirfd, dirname, O_DIRECTORY);
if (dirfd == -1) {
printf("%s [kon mapje niet open(2)en]\n", dirname);
total_dirs--; // not a directory after all
encountered_error = true;
return;
}
if (parentdirfd == -1) {
printf("%s\n", dirname);
}
for (int i = 0; i < nitems; i++) {
if (i < nitems - 1) prefix[depth-1] = 0;
else prefix[depth-1] = 1;
print_prefix(depth);
if (list[i]->d_type == DT_LNK) {
ssize_t len = parentdirfd == -1
? readlink(list[i]->d_name, linknamebuf, PATH_MAX - 1)
: readlinkat(dirfd, list[i]->d_name, linknamebuf, PATH_MAX - 1);
if (len == -1) {
printf("%s -> [kon niet leeslinken]\n", list[i]->d_name);
} else {
linknamebuf[len] = '\0';
printf("%s -> %s\n", list[i]->d_name, linknamebuf);
}
} else printf("%s\n", list[i]->d_name);
if (list[i]->d_type == DT_DIR) {
if (i < nitems - 1) prefix[depth-1] = 2;
else prefix[depth-1] = 3;
boom(dirfd, list[i]->d_name, depth + 1);
} else {
total_files++;
}
free(list[i]);
}
close(dirfd);
free(list);
}
int entry_boom(int argc, char **argv) {
char **args = parse_options(argc, argv);
if (*args == NULL) {
boom(-1, ".", 1);
} else for (int i = 0; args[i]; i++) {
boom(-1, args[i], 1);
}
putchar('\n');
printf("%zu map%s", total_dirs, total_dirs == 1 ? "" : "jes");
if (!dirs_only) printf(", %zu bestand%s", total_files, total_files == 1 ? "" : "en");
putchar('\n');
return encountered_error;
}
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