void read_cmd()
{
char cmdline[100];
printf(">>");
fflush(stdout);
fgets(cmdline,100,stdin);
fill_argv(cmdline);
}
void read_input(int mode, char *batch_path) {
char c;
int current_length = (BUFFER_SIZE + 1);
line = (char *) malloc(sizeof(char) * (BUFFER_SIZE + 1));
char *path = (char *) malloc(sizeof(char) * (BUFFER_SIZE + 1));
fflush(stderr);
printf("\n[SHELL ] ");
fflush(stdout);
int run = 1, len = 0;
if (mode == BATCH) {
if (open(batch_path, O_RDONLY) > 0) {
batch_file = fopen(batch_path, "r");
} else {
fprintf(stderr, "cann't open or read the file\n");
return;
}
}
while (c != EOF && run) {
if (mode == INTERACTIVE)
c = getchar();
else {
c = fgetc(batch_file);
if (feof(stdin)) {
run = 0;
break;
}
}
switch (c) {
case '\n':
if (line[0] == '\0') {
len = 0;
free_args();
bzero(line, current_length);
fflush(stderr);
printf("\n[SHELL ] ");
fflush(stdout);
} else {
if (mode == BATCH) {
printf("%s\n", line);
}
if (len >= BUFFER_SIZE) {
fprintf(stderr, "buffer limit excited\n");
bzero(line, current_length);
len = 0;
continue;
}
add_to_history(line);
free_args();
fill_argv(line);
if (is_comment(line) == 0) {
if (strchr(line, '=') != NULL
&& strcmp(args[0], "echo") != 0) {
assign_var(line);
} else {
// free_args();
// fill_argv(line);
if (strcmp(args[0], "echo") != 0) {
int i;
for (i = 0; args[i] != NULL; i++) {
append_home_dir(args[i]);
fix_echo_line(args[i]);
}
} else {
int i;
for (i = 1; args[i] != NULL; i++) {
fix_echo_line(args[i]);
}
}
if (strcmp("exit", line) == 0) {
run = 0;
break;
} else if (strcmp("history", args[0]) == 0) {
execute_history();
} else if (strcmp("cd", args[0]) == 0)
cd();
else {
strcpy(path, args[0]);
if (strchr(path, '/') != NULL) {
int fd;
if ((fd = open(path, O_RDONLY)) > 0) {
close(fd);
call_execve(path);
} else {
fprintf(stderr,
"%s: No such file or directory\n",
args[0]);
}
} else {
if (!is_command(path)) {
fprintf(stderr, "%s: command not found\n",
args[0]);
} else {
call_execve(path);
}
}
}
}
}
free_args();
fflush(stderr);
printf("\n[SHELL ] ");
fflush(stdout);
bzero(line, BUFFER_SIZE);
len = 0;
}
bzero(line, BUFFER_SIZE);
break;
default:
len++;
if (len < BUFFER_SIZE) {
strncat(line, &c, 1);
}
break;
}
}
if (mode == BATCH)
fclose(batch_file);
}
int main(int argc, char *argv[], char *envp[])
{
int write_bytes;
char exec_file_name[STRING_MAX];
char path_str[STRING_MAX];
int flag_exit;
int exec_status;
int index;
int fd;
pid_t pid;
signal(SIGINT, SIG_IGN);
signal(SIGINT, handle_signal);
read_bytes = STRING_MAX;
fflush(stdout);
get_path_string(envp, path_str);
insert_path_str_to_search(path_str);
do {
memset(exec_file_name, 0, read_bytes);
write_bytes = write(1, MESS_BASH_WAIT_COMMAND,
sizeof(MESS_BASH_WAIT_COMMAND));
read_bytes = 1;
read_bytes = read(0, exec_file_name, STRING_MAX);
if (read_bytes != 1) {
exec_file_name[read_bytes-1] = 0;
flag_exit = strcmp(exec_file_name, COMMAND_BASH_CLOSE);
if (flag_exit)
switch (pid = fork()) {
case -1:
perror("fork");
exit(1);
case 0:
fill_argv(exec_file_name);
if (argv_child[0][0] != '/') {
fd = open(argv_child[0], O_RDONLY);
if (fd > 0) {
close(fd);
} else if (attach_path() != 0) {
printf("0 %s: %s\n",
argv_child[0],
MESS_BASH_COMMAND_MISS);
exit(1);
}
} else {
fd = open(argv_child[0], O_RDONLY);
if (fd > 0) {
close(fd);
} else {
printf("1 %s: %s\n",
argv_child[0],
MESS_BASH_COMMAND_MISS);
exit(1);
}
}
exec_status = execve(argv_child[0],
argv_child, envp);
if (exec_status < 0) {
printf("2 %s: %s\n",
argv_child[0],
MESS_BASH_COMMAND_MISS);
exit(1);
}
exit(0);
default:
wait(NULL);
}
}
} while (flag_exit);
for (index = 0; argv_child[index] != NULL; index++)
free(argv_child[index]);
for (index = 0; search_path[index] != NULL; index++)
free(search_path[index]);
write_bytes = write(1, MESS_BASH_NL, sizeof(MESS_BASH_NL));
return 0;
}
