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.
110 lines
3.5 KiB
110 lines
3.5 KiB
#pragma once
|
|
|
|
#define CMDLINE_MAX_SIZE 1024 /* max length of a single command line */
|
|
#define ARGS_MAX_QUANTITY 128 /* max args on a command line */
|
|
#define BUFFER_MAX_SIZE 64 /* max size of a buffer which contains parsed arguments */
|
|
#define CMDLINE_DIV ' \t\r\n\a'
|
|
#define CMDLINE_HISTORY_MAX_QUANTITY 256
|
|
#define JOBS_MAX_QUANTITY 16
|
|
#define PATH_MAX_SIZE 256
|
|
#define LS_BUF_SIZE 1024
|
|
|
|
#define UNDF 0 /* undefined */
|
|
#define FG 1 /* running in foreground */
|
|
#define BG 2 /* running in background */
|
|
#define ST 3 /* stopped */
|
|
|
|
/* job_t - The job struct */
|
|
struct job_t
|
|
{
|
|
pid_t pid; /* job PID */
|
|
int jid; /* job ID [1, 2, ...] */
|
|
int state; /* UNDEF, BG, FG, or ST */
|
|
char cmdline[CMDLINE_MAX_SIZE]; /* command line */
|
|
};
|
|
|
|
/* readline - Get the command line */
|
|
char *readline();
|
|
|
|
/* parseline - Evaluate the command line that the user has just typed in */
|
|
int parseline(char *cmdline, char **args);
|
|
|
|
/* execute - Execute the command line */
|
|
int execute(char *cmdline, char **args);
|
|
|
|
/* builtin functions - Handle built-in command */
|
|
int built_in(char **args);
|
|
int builtin_cd(char **args);
|
|
int builtin_history(char **args);
|
|
int builtin_jobs(char **args);
|
|
int builtin_mytop(char **args);
|
|
|
|
/* do_bgfg - Execute background/foregroung tasks */
|
|
int do_bgfg(char **args);
|
|
|
|
/* waitfg - Wait foreground jobs to finish */
|
|
void waitfg(pid_t pid);
|
|
|
|
/* initjobs - Initialize the job list */
|
|
void initjobs(struct job_t *jobs);
|
|
|
|
/* addjob - Add jobs to joblist */
|
|
int addjob(struct job_t *jobs, pid_t pid, int state, char *cmdline);
|
|
|
|
/* listjobs - Print the job list */
|
|
void listjobs(struct job_t *jobs);
|
|
|
|
/* deletejob - Delete a job whose PID=pid from the job list */
|
|
int deletejob(struct job_t *jobs, pid_t pid);
|
|
|
|
/* clearjob - Clear the entries in a job struct */
|
|
void clearjob(struct job_t *job);
|
|
|
|
/* pide2jid - Map process ID to job ID*/
|
|
int pid2jid(pid_t pid);
|
|
|
|
/* fgpid - Return PID of current foreground job, 0 if no such job */
|
|
pid_t fgpid(struct job_t *jobs);
|
|
|
|
/* getjobpid - Find a job (by PID) on the job list */
|
|
struct job_t *getjobpid(struct job_t *jobs, pid_t pid);
|
|
|
|
/* getjobjid - Find a job (by JID) on the job list */
|
|
struct job_t *getjobjid(struct job_t *jobs, int jid);
|
|
|
|
/* maxjid - Returns largest allocated job ID */
|
|
int maxjid(struct job_t *jobs);
|
|
|
|
/* Signal - wrapper for the sigaction function */
|
|
typedef void handler_t(int);
|
|
handler_t *Signal(int signum, handler_t *handler);
|
|
|
|
/*
|
|
* sigchld_handler - The kernel sends a SIGCHLD to the shell whenever
|
|
* a child job terminates (becomes a zombie), or stops because it
|
|
* received a SIGSTOP or SIGTSTP signal. The handler reaps all
|
|
* available zombie children, but doesn't wait for any other
|
|
* currently running children to terminate.
|
|
*/
|
|
void sigchld_handler(int signal);
|
|
|
|
/*
|
|
* sigint_handler - The kernel sends a SIGINT to the shell whenver the
|
|
* user types ctrl-c at the keyboard. Catch it and send it along
|
|
* to the foreground job.
|
|
*/
|
|
void sigint_handler(int signal);
|
|
|
|
/*
|
|
* sigtstp_handler - The kernel sends a SIGTSTP to the shell whenever
|
|
* the user types ctrl-z at the keyboard. Catch it and suspend the
|
|
* foreground job by sending it a SIGTSTP.
|
|
*/
|
|
|
|
void sigtstp_handler(int signal);
|
|
|
|
/*
|
|
* sigquit_handler - The driver program can gracefully terminate the
|
|
* child shell by sending it a SIGQUIT signal.
|
|
*/
|
|
void sigquit_handler(int signal);
|