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Commit 70cb8eb

Browse files
committed
Simple renaming. Minor changes.
1 parent d6196ba commit 70cb8eb

9 files changed

+741
-871
lines changed

‎multithreading/03 - Nonamed_pipes.cpp

Lines changed: 0 additions & 132 deletions
This file was deleted.
Lines changed: 41 additions & 41 deletions
Original file line numberDiff line numberDiff line change
@@ -1,41 +1,41 @@
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "Common.h"
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// To compile:
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// gcc -std=gnu99 "01 - Signals_SIGCHLD.c" -o signals_sigchld
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// Task:
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// Create a program which creates a child process and handles SIGCHLD signal from its childs.
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int main()
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{
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pid_t main_pid = getpid();
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printf("Start of process %d\n", main_pid);
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// Handle child process killing.
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handle_child_finishing();
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// Make child.
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pid_t child_pid;
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if((child_pid = fork()))
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{
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printf("PARENT: Started child process %d.\n", child_pid);
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printf("PARENT: Parent process works 1 second.\n");
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sleep(1);
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}
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else
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{
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// Do anything in child.
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}
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printf("End of process %d\n", getpid());
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exit(0);
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}
1+
#include <signal.h>
2+
#include <stdio.h>
3+
#include <stdlib.h>
4+
#include <unistd.h>
5+
6+
#include "Common.h"
7+
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// To compile:
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// gcc -std=gnu99 "01 - Signals_SIGCHLD.c" -o signals_sigchld
10+
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// Task:
12+
// Create a program which creates a child process and handles SIGCHLD signal from its childs.
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int main()
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{
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pid_t main_pid = getpid();
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18+
printf("Start of process %d\n", main_pid);
19+
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// Handle child process killing.
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handle_child_finishing();
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// Make child.
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pid_t child_pid;
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if((child_pid = fork()))
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{
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printf("PARENT: Started child process %d.\n", child_pid);
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printf("PARENT: Parent process works 1 second.\n");
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sleep(1);
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}
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else
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{
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// Do anything in child.
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}
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printf("End of process %d\n", getpid());
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exit(EXIT_SUCCESS);
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}
Original file line numberDiff line numberDiff line change
@@ -1,91 +1,91 @@
1-
#include <signal.h>
2-
#include <stdio.h>
3-
#include <stdlib.h>
4-
#include <unistd.h>
5-
6-
#include "Common.h"
7-
8-
pid_t child_pid;
9-
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// Compilation:
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// gcc "01 - Signals_SIGINT_SIGTERM_nonkillable_parent.c" -o nonkillable_parent
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// Task:
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// Create a program which creates a child process and this child process can be killed by SIGTERM or SIGINT.
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// However, parent should not be killed by first SIGTERM/SIGINT. It may be killed in further signals.
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void cant_stop_me_handler(int sig)
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{
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if (child_pid)
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{
21-
raise(-9); // or kill(-9, child_pid);
22-
printf("SIGCHLD Child: killed %d.\n", child_pid);
23-
}
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else
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{
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printf("SIGCHLD Parent: Ha-ha, can't kill me this time :)! (try again)\n");
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}
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}
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void cant_stop_me_handler_int(int sig)
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{
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if (child_pid)
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{
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raise(-9); // or kill(-9, child_pid);
35-
printf("SIGINT Child: killed %d.\n", child_pid);
36-
}
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else
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{
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printf("SIGINT Parent: Ha-ha, can't kill me this time :)! (try again)\n");
40-
}
41-
}
42-
43-
int main()
44-
{
45-
pid_t main_pid = getpid();
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printf("Start of process %d forever.\n", main_pid);
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// Do no stop by SIGTERM.
50-
struct sigaction cant_stop_me_signal;
51-
cant_stop_me_signal.sa_handler = cant_stop_me_handler;
52-
sigemptyset(&cant_stop_me_signal.sa_mask);
53-
cant_stop_me_signal.sa_flags = SA_RESETHAND; // Non-permanent handler. Handle only first time...
54-
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if (sigaction(SIGTERM, &cant_stop_me_signal, 0) == -1)
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{
57-
perror("Error of calling sigaction in parent.");
58-
exit(EXIT_FAILURE);
59-
}
60-
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// Do no stop by SIGINT.
62-
struct sigaction cant_stop_me_signal1;
63-
cant_stop_me_signal1.sa_handler = cant_stop_me_handler_int;
64-
sigemptyset(&cant_stop_me_signal1.sa_mask);
65-
cant_stop_me_signal1.sa_flags = SA_RESETHAND; // Non-permanent handler. Handle only first time...
66-
67-
if (sigaction(SIGINT, &cant_stop_me_signal1, 0) == -1)
68-
{
69-
perror("Error of calling sigaction in parent.");
70-
exit(EXIT_FAILURE);
71-
}
72-
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// Make child.
74-
if((child_pid = fork()))
75-
{
76-
printf("PARENT: Start of child process %d forever. Press Ctrl+C OR write 'kill -9 %d' to terminate child.\n", child_pid, child_pid);
77-
}
78-
else
79-
{
80-
// Do anything in child.
81-
}
82-
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while(1)
84-
{
85-
// Forever... until someone press Ctrl+C or write 'kill -9 xxxx'
86-
}
87-
88-
printf("End of process %d\n", getpid());
89-
90-
exit(0);
91-
}
1+
#include <signal.h>
2+
#include <stdio.h>
3+
#include <stdlib.h>
4+
#include <unistd.h>
5+
6+
#include "Common.h"
7+
8+
pid_t child_pid;
9+
10+
// Compilation:
11+
// gcc "01 - Signals_SIGINT_SIGTERM_nonkillable_parent.c" -o nonkillable_parent
12+
13+
// Task:
14+
// Create a program which creates a child process and this child process can be killed by SIGTERM or SIGINT.
15+
// However, parent should not be killed by first SIGTERM/SIGINT. It may be killed in further signals.
16+
17+
void cant_stop_me_handler(int sig)
18+
{
19+
if (child_pid)
20+
{
21+
raise(-9); // or kill(-9, child_pid);
22+
printf("SIGCHLD Child: killed %d.\n", child_pid);
23+
}
24+
else
25+
{
26+
printf("SIGCHLD Parent: Ha-ha, can't kill me this time :)! (try again)\n");
27+
}
28+
}
29+
30+
void cant_stop_me_handler_int(int sig)
31+
{
32+
if (child_pid)
33+
{
34+
raise(-9); // or kill(-9, child_pid);
35+
printf("SIGINT Child: killed %d.\n", child_pid);
36+
}
37+
else
38+
{
39+
printf("SIGINT Parent: Ha-ha, can't kill me this time :)! (try again)\n");
40+
}
41+
}
42+
43+
int main()
44+
{
45+
pid_t main_pid = getpid();
46+
47+
printf("Start of process %d forever.\n", main_pid);
48+
49+
// Do no stop by SIGTERM.
50+
struct sigaction cant_stop_me_signal;
51+
cant_stop_me_signal.sa_handler = cant_stop_me_handler;
52+
sigemptyset(&cant_stop_me_signal.sa_mask);
53+
cant_stop_me_signal.sa_flags = SA_RESETHAND; // Non-permanent handler. Handle only first time...
54+
55+
if (sigaction(SIGTERM, &cant_stop_me_signal, 0) == -1)
56+
{
57+
perror("Error of calling sigaction in parent.");
58+
exit(EXIT_FAILURE);
59+
}
60+
61+
// Do no stop by SIGINT.
62+
struct sigaction cant_stop_me_signal1;
63+
cant_stop_me_signal1.sa_handler = cant_stop_me_handler_int;
64+
sigemptyset(&cant_stop_me_signal1.sa_mask);
65+
cant_stop_me_signal1.sa_flags = SA_RESETHAND; // Non-permanent handler. Handle only first time...
66+
67+
if (sigaction(SIGINT, &cant_stop_me_signal1, 0) == -1)
68+
{
69+
perror("Error of calling sigaction in parent.");
70+
exit(EXIT_FAILURE);
71+
}
72+
73+
// Make child.
74+
if((child_pid = fork()))
75+
{
76+
printf("PARENT: Start of child process %d forever. Press Ctrl+C OR write 'kill -9 %d' to terminate child.\n", child_pid, child_pid);
77+
}
78+
else
79+
{
80+
// Do anything in child.
81+
}
82+
83+
while(1)
84+
{
85+
// Forever... until someone press Ctrl+C or write 'kill -9 xxxx'
86+
}
87+
88+
printf("End of process %d\n", getpid());
89+
90+
exit(EXIT_SUCCESS);
91+
}

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