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#include "job.h"
namespace ov4
{
struct job_t _jobs[MAXJOBS];
int nextjid = 1;
void clearjob(struct job_t *job) {
job->pid = 0;
job->jid = 0;
job->state = UNDEF;
job->cmdline[0] = '\0';
}
/* initjobs - Initialize the job list */
void initjobs(struct job_t *job) {
int i;
for (i = 0; i < MAXJOBS; i++)
clearjob(&job[i]);
}
/* maxjid - Returns largest allocated job ID */
int maxjid(struct job_t *job)
{
int i, max=0;
for (i = 0; i < MAXJOBS; i++)
if (job[i].jid > max)
max = job[i].jid;
return max;
}
/* addjob - Add a job to the job list */
int addjob(pid_t pid, int state, const char *cmdline, struct job_t *job)
{
int i;
if (pid < 1)
return 0;
for (i = 0; i < MAXJOBS; i++) {
if (job[i].pid == 0) {
job[i].pid = pid;
job[i].state = state;
job[i].jid = nextjid++;
if (nextjid > MAXJOBS)
nextjid = 1;
strcpy(job[i].cmdline, cmdline);
if(verbose){
printf("Added job [%d] %d %s\n", job[i].jid, job[i].pid, job[i].cmdline);
}
return 1;
}
}
printf("Tried to create too many jobs\n");
return 0;
}
/* deletejob - Delete a job whose PID=pid from the job list */
int deletejob(pid_t pid, struct job_t *job)
{
int i;
if (pid < 1)
return 0;
for (i = 0; i < MAXJOBS; i++) {
if (job[i].pid == pid) {
clearjob(&job[i]);
nextjid = maxjid(job)+1;
return 1;
}
}
return 0;
}
/* fgpid - Return PID of current foreground job, 0 if no such job */
pid_t fgpid(struct job_t *job) {
int i;
for (i = 0; i < MAXJOBS; i++)
if (job[i].state == FG)
return job[i].pid;
return 0;
}
/* getjobpid - Find a job (by PID) on the job list */
struct job_t *getjobpid(pid_t pid, struct job_t *job) {
int i;
if (pid < 1)
return NULL;
for (i = 0; i < MAXJOBS; i++)
if (job[i].pid == pid)
return &job[i];
return NULL;
}
/* getjobjid - Find a job (by JID) on the job list */
struct job_t *getjobjid(int jid, struct job_t *job)
{
int i;
if (jid < 1)
return NULL;
for (i = 0; i < MAXJOBS; i++)
if (job[i].jid == jid)
return &job[i];
return NULL;
}
/* pid2jid - Map process ID to job ID */
int pid2jid(pid_t pid, struct job_t *job)
{
int i;
if (pid < 1)
return 0;
for (i = 0; i < MAXJOBS; i++)
if (job[i].pid == pid) {
return job[i].jid;
}
return 0;
}
/* listjobs - Print the job list */
void listjobs(struct job_t *job)
{
int i;
for (i = 0; i < MAXJOBS; i++) {
if (job[i].pid != 0) {
printf("[%d] (%d) ", job[i].jid, job[i].pid);
switch (job[i].state) {
case BG:
printf("Running ");
break;
case FG:
printf("Foreground ");
break;
case ST:
printf("Stopped ");
break;
default:
printf("listjobs: Internal error: job[%d].state=%d ",
i, job[i].state);
}
printf("%s", job[i].cmdline);
}
}
}
bool job_suspend(pid_t pid, struct job_t *job) {
int i;
for (i = 0; i < MAXJOBS; i++)
if (job[i].pid == pid)
{
job[i].state = ST;
return true;
}
return false;
}
}
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