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#include "builtins.h"
#include "shell.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
static void cmd_cat(int argc, const char **argv) {
// TODO loop over argv
FILE *file;
static char buf[512];
if (argv[1])
file = fopen(argv[1], "r");
else
file = file_clone(stdin);
if (!file) {
eprintf("couldn't open");
return;
}
for (;;) {
int len = fread(buf, 1, sizeof buf, file);
if (len <= 0) break;
fwrite(buf, 1, len, stdout);
}
fclose(file);
}
static void cmd_echo(int argc, const char **argv) {
bool newline = true;
int i = 1;
if (!strcmp("-n", argv[i])) {
i++;
newline = false;
}
printf("%s", argv[i++]);
for (; argv[i]; i++)
printf(" %s", argv[i]);
if (newline)
printf("\n");
}
void cmd_hexdump(int argc, const char **argv) {
// TODO loop over argv
// TODO use fopen/fread
static uint8_t buf[512];
int fd, len;
fd = _syscall_open(argv[1], strlen(argv[1]), 0);
if (fd < 0) {
eprintf("couldn't open %s", argv[1]);
return;
}
len = _syscall_read(fd, buf, sizeof buf, 0);
for (int i = 0; i < len; i += 16) {
printf("%08x ", i);
for (int j = i; j < i + 8 && j < len; j++)
printf("%02x ", buf[j]);
printf(" ");
for (int j = i + 8; j < i + 16 && j < len; j++)
printf("%02x ", buf[j]);
printf(" |");
for (int j = i; j < i + 16 && j < len; j++) {
char c = '.';
if (0x20 <= buf[j] && buf[j] < 0x7f) c = buf[j];
printf("%c", c);
}
printf("|\n");
}
close(fd);
}
static void cmd_ls(int argc, const char **argv) {
// TODO loop over argv
FILE *file;
static char buf[512];
if (argv[1]) {
int len = strlen(argv[1]);
memcpy(buf, argv[1], len + 1); // TODO no overflow check
if (buf[len-1] != '/') {
buf[len] = '/';
buf[len+1] = '\0';
}
file = fopen(buf, "r");
} else {
file = fopen("/", "r");
}
if (!file) {
eprintf("couldn't open");
return;
}
for (;;) {
int len = fread(buf, 1, sizeof buf, file);
if (len <= 0) break;
for (int i = 0; i < len; i++)
if (buf[i] == '\0') buf[i] = '\n';
fwrite(buf, 1, len, stdout);
}
fclose(file);
}
static void cmd_touch(int argc, const char **argv) {
// TODO loop over argv
int fd = _syscall_open(argv[1], strlen(argv[1]), OPEN_CREATE);
if (fd < 0) {
eprintf("couldn't touch %s\n", argv[1]);
return;
}
close(fd);
}
struct builtin builtins[] = {
{"cat", cmd_cat},
{"echo", cmd_echo},
{"hexdump", cmd_hexdump},
{"ls", cmd_ls},
{"touch", cmd_touch},
{NULL, NULL},
};
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