mii_emu/libmish/tests/mish_debug_test.c

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/*
* mish_debug_test.c
*
* Copyright (C) 2020 Michel Pollet <buserror@gmail.com>
*
* SPDX-License-Identifier: Apache-2.0
*/
/*
* NOTE this program is made for debug purpose only, it basically give you
* telnet command access remotely
* IT IS JUST MADE TO DEBUG LIBMISH, DO NOT USE IN PROD!
*/
#define _GNU_SOURCE // for asprintf
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include "mish.h"
static void
sigchld_handler(int s)
{
int status = 0;
pid_t pid = waitpid(-1, &status, WNOHANG);
if (pid > 0) {
if (WIFEXITED(status) && WEXITSTATUS(status))
fprintf(stderr, "pid %d returned %d\n", (int)pid, WEXITSTATUS(status));
if (WIFSIGNALED(status))
fprintf(stderr, "pid %d terminated with %s\n",
(int)pid, strsignal(WTERMSIG(status)));
}
}
int main()
{
signal(SIGCHLD, sigchld_handler);
mish_prepare(0);
while (1) {
sleep(1);
}
}
static const char *
_shell_which(
const char * cmd)
{
if (cmd[0] == '.' || cmd[0] == '/')
return strdup(cmd);
char * path = strdup(getenv("PATH"));
char * cur = path, *e;
while ((e = strsep(&cur, ":")) != NULL) {
char *pe;
asprintf(&pe, "%s/%s", e, cmd);
struct stat st = {};
if (stat(pe, &st) == 0) {
return pe;
}
free(pe);
}
fprintf(stderr, "%s: command not found\n", cmd);
return NULL;
}
static void
_test_shell_cnt(
void * param,
int argc,
const char * argv[])
{
const char * av[argc + 1];
av[0] = _shell_which(argv[1]);
if (av[0] == NULL)
return;
for (int ai = 1; ai <= argc; ai++)
av[ai] = argv[ai+1];
pid_t pid = fork();
if (pid == 0) {
execv(av[0], (void*)av);
perror(av[0]);
close(0);close(1);close(2);
exit(1);
}
}
MISH_CMD_NAMES(shell, "shell");
MISH_CMD_HELP(shell,
"run a shell command",
"test command for libmish!");
MISH_CMD_REGISTER(shell, _test_shell_cnt);