-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathProcessController.cpp
More file actions
181 lines (155 loc) · 3.43 KB
/
ProcessController.cpp
File metadata and controls
181 lines (155 loc) · 3.43 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
#include "ProcessController.h"
int ProcessController::AddProcGroups(const vector<Executor>& exes, const string& cmd)
{
pgrps.emplace_back(ProcessGrouper(exes));
ProcessGrouper &pgrp = *pgrps.rbegin();
pgrp.originCmds = cmd;
return 0;
}
int ProcessController::StartProc(bool isfg)
{
if( pgrps.size() == 0 ) {
printf("Fatel Error: No processes could be start\n");
exit(1);
}
ProcessGrouper &pgrp = *pgrps.rbegin();
if( pgrp.Start() != 0 ) {
printf("Error: %s\n",strerror(errno));
pgrp.PassSignal(SIGKILL);
printf("go back");
return Failure;
}
fgIndex = pgrps.size() -1;
if(isfg) {
TakeTerminalControl(pgrp.GetPgid());
}
return Success;
}
int ProcessController::TakeTerminalControl(pid_t pgid)
{
pid_t target = pgid;
if( pgid == Shell ) {
target = shellPgid;
}
if( pgid == ForeGround ) {
if( fgIndex != Shell )
target = pgrps[fgIndex].GetPgid();
else
target = shellPgid;
}
fflush(stdout);
bool hasError = false;
if( 0 != tcsetpgrp(0, target) ) {
puts("setpgrp error");
puts(strerror(errno));
hasError = true;
}
if( 0 != tcsetpgrp(1, target) ) {
puts("setpgrp error");
puts(strerror(errno));
hasError = true;
}
if( 0 != tcsetpgrp(2, target) ) {
puts("setpgrp error");
puts(strerror(errno));
hasError = true;
}
if( hasError == true ) {
if( pgid == getpgid(0) || pgid == Shell ) {
puts("Fatel Error: same pgid but set pgrp failed");
exit(1);
}
else
TakeTerminalControl(Shell);
}
return 0;
}
int ProcessController::FreeProcess(pid_t pid)
{
for( size_t i = 0 ; i < pgrps.size() ; ++i ) {
int rc = pgrps[i].NotifyTerminated(pid);
if( rc != ProcNotMine ) {
if( rc == ProcAllDone ) {
pgrps.erase(pgrps.begin() + i);
if( fgIndex == (int)i ) {
fgIndex = pgrps.size()-1;
return ProcAllDone;
}
}
break;
}
}
return ProcNotAllDone;
}
int ProcessController::SendSignalToFG(int sig)
{
kill(pgrps[fgIndex].GetPgid(),sig);
return 0;
}
void ProcessController::BackToShell()
{
TakeTerminalControl(Shell);
SendSignalToFG(SIGTSTP);
}
int ProcessController::BringToFront(int index)
{
if( index == -1 ) {
//printf("FG default\n");
TakeTerminalControl(ForeGround);
SendSignalToFG(SIGCONT);
}
else if( 0 <= index && index < (int)pgrps.size() ) {
//printf("FG spec\n");
fgIndex = index;
TakeTerminalControl(ForeGround);
SendSignalToFG(SIGCONT);
}
else {
printf("Error: index out of range\n");
return Failure;
}
return Success;
}
int ProcessController::BringToBack(int index)
{
if( index == -1 ) {
//printf("FG default\n");
//TakeTerminalControl(ForeGround);
SendSignalToFG(SIGCONT);
}
else if( 0 <= index && index < (int)pgrps.size() ) {
//printf("FG spec\n");
fgIndex = index;
//TakeTerminalControl(ForeGround);
SendSignalToFG(SIGCONT);
}
else {
printf("Error: index out of range\n");
return Failure;
}
return Success;
}
void ProcessController::printJobs()
{
for( size_t i = 0 ; i < pgrps.size() ; ++i ) {
printf("\n=== Process Group %lu ===\n",i);
if(fgIndex == (int)i)puts("Foreground Process Group");
else puts("Background Process Group");
printf("Cmd: %s\n",pgrps[i].originCmds.c_str());
printf("pgid: %d\n",pgrps[i].GetPgid());
}
}
void ProcessController::RefreshJobStatus()
{
bool retry = false;
do {
retry = false;
for( size_t i = 0 ; i < pgrps.size() ; ++i ) {
if( 0 != kill(- pgrps[i].GetPgid(), 0) ) {
pgrps.erase(pgrps.begin() +i);
retry = true;
break;
}
}
} while(retry);
}