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iron_shell.h
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iron_shell.h
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#ifndef IRON_SHELL_H
#define IRON_SHELL_H 1
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include "command_handler.h"
#include "signals.h"
#include "builtin.h"
#include "job.h"
#define HISTORY_LOG "/tmp/iron-shell-logs.txt"
#define MAX_JOBS (1024)
typedef struct IronShellJobNode {
IronShellJob job; /* the job which is suspended */
struct IronShellJobNode *next; /* the next job reference in list */
} IronShellJobNode;
typedef struct IronShellJobList {
IronShellJobNode *head, *tail; /* list of jobs suspended or running */
int count_jobs; /* number of such jobs */
} IronShellJobList;
/* IRON-shell Control Block */
typedef struct IronShellControlBlock {
IronShellJob fg_job; /* currently executing foreground job */
double execution_time; /* execution time of last command */
char history_commands_file[128]; /* command history log file */
IronShellJobList jobs; /* list of currently suspened and runing jobs */
char pwd[128]; /* previous working directory */
} IronShellControlBlock;
/* initializes the shell control block */
void init_shell_control_block(IronShellControlBlock *iscb);
/* initializes the job list data structure for suspended or runnning tasks */
void init_job_list(IronShellJobList *jobs);
/* add job to the job list */
void add_job(IronShellJobList *jobs, IronShellJob job);
/* resumes job in foreground */
void resume_job_fg(IronShellJobList *jobs, int index, IronShellJob *job);
/* resumes job in background */
void resume_job_bg(IronShellJobList *jobs, int index);
/* prints the current running and suspended jobs */
void print_jobs(IronShellJobList jobs);
/* destory all the jobs which are currently active */
void destroy_jobs(IronShellJobList *jobs);
/* returns true if there no jobs present in background */
bool no_jobs(IronShellJobList jobs);
/* delelte the job having the given pid */
bool delete_job(IronShellJobList *jobs, pid_t pid);
#endif /* IRON_SHELL_H */