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/*
* Display directory contents
*/
#include <stdlib.h>
#include <stdio.h>
#include <console.h>
#include <string.h>
#include <com32.h>
#include <dirent.h>
#include <minmax.h>
#include <unistd.h>
#include <getkey.h>
static int rows, cols; /* Screen parameters */
#define DIR_CHUNK 1024
static const char *type_str(int type)
{
switch (type) {
case DT_FIFO:
return "[fif]";
case DT_CHR:
return "[chr]";
case DT_DIR:
return "[dir]";
case DT_BLK:
return "[blk]";
case DT_UNKNOWN:
case DT_REG:
return "";
case DT_LNK:
return "[lnk]";
case DT_SOCK:
return "[sck]";
case DT_WHT:
return "[wht]";
default:
return "[???]";
}
}
static void free_dirents(struct dirent **dex, size_t n_de)
{
size_t i;
for (i = 0; i < n_de; i++)
free(dex[i]);
free(dex);
}
static int compare_dirent(const void *p_de1, const void *p_de2)
{
const struct dirent *de1 = *(const struct dirent **)p_de1;
const struct dirent *de2 = *(const struct dirent **)p_de2;
int ndir1, ndir2;
ndir1 = de1->d_type != DT_DIR;
ndir2 = de2->d_type != DT_DIR;
if (ndir1 != ndir2)
return ndir1 - ndir2;
return strcmp(de1->d_name, de2->d_name);
}
static int display_directory(const char *dirname)
{
DIR *dir;
struct dirent *de;
struct dirent **dex = NULL;
size_t n_dex = 0, n_de = 0;
size_t i, j, k;
size_t nrows, ncols, perpage;
size_t endpage;
int maxlen = 0;
int pos, tpos, colwidth;
dir = opendir(dirname);
if (!dir) {
printf("Unable to read directory: %s\n", dirname);
return -1;
}
while ((de = readdir(dir)) != NULL) {
struct dirent *nde;
if (n_de >= n_dex) {
struct dirent **ndex;
ndex = realloc(dex, (n_dex + DIR_CHUNK) * sizeof *dex);
if (!ndex)
goto nomem;
dex = ndex;
n_dex += DIR_CHUNK;
}
nde = malloc(de->d_reclen);
if (!nde)
goto nomem;
memcpy(nde, de, de->d_reclen);
dex[n_de++] = nde;
maxlen = max(maxlen, de->d_reclen);
}
closedir(dir);
qsort(dex, n_de, sizeof *dex, compare_dirent);
maxlen -= offsetof(struct dirent, d_name) + 1;
ncols = (cols + 2)/(maxlen + 8);
ncols = min(ncols, n_de);
ncols = max(ncols, 1U);
colwidth = (cols + 2)/ncols;
perpage = ncols * (rows - 1);
for (i = 0; i < n_de; i += perpage) {
/* Rows on this page */
endpage = min(i+perpage, n_de);
nrows = ((endpage-i) + ncols - 1)/ncols;
for (j = 0; j < nrows; j++) {
pos = tpos = 0;
for (k = i+j; k < endpage; k += nrows) {
pos += printf("%*s%-5s %s",
(tpos - pos), "",
type_str(dex[k]->d_type),
dex[k]->d_name);
tpos += colwidth;
}
printf("\n");
}
if (endpage >= n_de)
break;
get_key(stdin, 0);
}
free_dirents(dex, n_de);
return 0;
nomem:
closedir(dir);
printf("Out of memory error!\n");
free_dirents(dex, n_de);
return -1;
}
int main(int argc, char *argv[])
{
int rv;
openconsole(&dev_rawcon_r, &dev_stdcon_w);
if (getscreensize(1, &rows, &cols)) {
/* Unknown screen size? */
rows = 24;
cols = 80;
}
if (argc < 2)
rv = display_directory(".");
else if (argc == 2)
rv = display_directory(argv[1]);
else {
printf("Usage: %s directory\n", argv[0]);
rv = 1;
}
return rv ? 1 : 0;
}
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