You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.3 KiB
54 lines
1.3 KiB
/*
|
|
* This app starts a very simple shell and executes some simple commands.
|
|
* The commands are stored in the hostfs_root/shellrc
|
|
* The shell loads the file and executes the command line by line.
|
|
*/
|
|
#include "user_lib.h"
|
|
#include "string.h"
|
|
#include "util/types.h"
|
|
|
|
int main(int argc, char *argv[]) {
|
|
printu("\n======== Shell Start ========\n\n");
|
|
int fd;
|
|
int MAXBUF = 1024;
|
|
char buf[MAXBUF];
|
|
char *token;
|
|
char delim[3] = " \n";
|
|
fd = open("/shellrc", O_RDONLY);
|
|
|
|
read_u(fd, buf, MAXBUF);
|
|
close(fd);
|
|
char *command = naive_malloc();
|
|
char *para = naive_malloc();
|
|
int start = 0;
|
|
while (1)
|
|
{
|
|
if(!start) {
|
|
token = strtok(buf, delim);
|
|
start = 1;
|
|
}
|
|
else
|
|
token = strtok(NULL, delim);
|
|
strcpy(command, token);
|
|
token = strtok(NULL, delim);
|
|
strcpy(para, token);
|
|
if(strcmp(command, "END") == 0 && strcmp(para, "END") == 0)
|
|
break;
|
|
printu("Next command: %s %s\n\n", command, para);
|
|
printu("==========Command Start============\n\n");
|
|
int pid = fork();
|
|
if(pid == 0) {
|
|
int ret = exec(command, para);
|
|
if (ret == -1)
|
|
printu("exec failed!\n");
|
|
}
|
|
else
|
|
{
|
|
wait(pid);
|
|
printu("==========Command End============\n\n");
|
|
}
|
|
}
|
|
exit(0);
|
|
return 0;
|
|
}
|