sigint

process;s) if Ngx_noaccept is 1 (ngx_signal_value (ngx_noaccept_signal) corresponds), set ngx_noaccepting to 1, call Ngx_signal_worker_processes () Sends a ngx_signal_value (ngx_shutdown_signal) signal.Here's a look at the code:1. First block some processing signal, because the woker process is not created, this information is temporarily not processedThe/*master process sets the signal to be processed */Sigemptyset (set);//To initialize the signal set to null sigaddset (set, SIGCHLD);//The sub

join, you can Ctrl + C kill the process " Threads: while 1: if t.isalive (): Sleep ( ) Else: breakThe disadvantage of this approach is to make the main thread block, until the sub-thread implementation of this function is too cumbersome to implement, originally with join to achieve a lot of convenienceThe following is a study of the process of trying, but all can not realize the function of CTRL + C shutdownThe original multi-

is Ngx_signal_handler (), as shown below. ./src/os/unix/ngx_process.c ngx_signal_t signals[] = {Ngx_signal_value (ngx_reconfigure_signal), "SIG" Ngx_value (ngx_reconfigure_signal), "Reload", Ngx_signal_handler}, {Ngx_signal_value (ngx_reopen_signal), "SIG" Ngx_value (ngx_reopen_ SIGNAL), "Reopen", Ngx_signal_handler}, {Ngx_signal_value (ngx_noaccept_signal), "SIG" Ngx_value (N gx_noaccept_signal), "", Ngx_signal_handler}, {Ngx_signal_value (ngx_terminate_signal), "SIG" ngx_ Value (ngx_ter

In Linux, the Trap command is used primarily to receive signals and act, signals are sent asynchronously to a program's event, by default, a program can be terminated, and the Trap command prototype is as follows: Trap command Signal Signal is the signal received, the command is received by the signal to take action. The following are two simple signals. Signal Description INT (2) Ctrl + C QUIT (3) Ctrl + \ The sample code is as follows [Root@localhost shell]# cat-n trap.sh 1 #!/bin/bash

SIG_DFL: Restore the default behavior of the signal Say so much, or give an example to explain it, the source file name is signal1.c, the code is as follows: #include The results of the operation are as follows: As you can see, the first time you press the Terminate command (CTRL + C), the process is not terminated, and the face is output ouch! -I got signal 2, because the default behavior of SIGINT is changed by the signal function, when th

running)LPassSend the signal to the program, allowing your program to process it, stop it, or take other actions.LNoPassStop the program from running, but do not send the signal to the program.For example, suppose you intercept a sigpipe signal to prevent the program being debugged from receiving the signal and, as soon as the signal arrives, ask the program to stop and notify you. To accomplish this, you can use the following command:(GDB)Handle Sigpipe StopprintNote that UNIX's signal names a

permissions (the synchronization directory plus svcwrsync full permissions, the simpler method is to set Svcwrsync as an administrator)3. Service not Startedrsync:failed to connect to 10.10.10.170:connection refused (111)Rsync error:error in Socket IO (code ten) at CLIENTSERVER.C (124) [receiver=3.0.5]Start service: rsync--daemon--config=/etc/rsyncd.conf4. Full disk spaceRsync:recv_generator:mkdir "/teacherclubbackup/rsync ..." failed:no space left on device (28)Skipping any contents from this

A. Trap1.trap is a shell built -in command used to specify how signals are handled in the script. For example, pressing CTRL + C causes the script to terminate execution, in fact the system sends a SIGINT signal to the script process, and the default processing of the SIGINT signal is to exit the program. If you want to do not quit the program in CTRL + C, then you have to use the trap command to specify ho

terminal ends, it notifies all jobs in the same session, they are no longer associated with control terminals. When you log on to Linux, the system assigns a Session to the login user ). All programs running on this terminal, including foreground and background process groups, generally belong to this Session. When you log out of Linux, processes in the frontend process group and in the background that are output to the terminal will receive a SIGHUP signal. The default operation of this signa

processed. If the internal signal is generated with Pthread_kill, only the target thread specified in the Pthread_kill parameter is received and processed. If the signal is generated externally using the KILL command, typically a job control signal such as SIGINT, SIGHUP, then all threads are traversed until a thread that does not block the signal is found and then called to process. (typically found from the main thread), note that only one

variable can be set to any required page scheduler. The default value is the more command. To change the default page scheduler, enter: PAGER = Somepager Export PAGER For example, if you customize the manual page in the opposite or partial line feed mode, you can set the PAGER environment variable to/usr/bin/pg so that the line feed will not be printed as the control character. This process is not necessary for the manual page. When a man command uses a hypertext database, it can retrieve se

message (and implicitly do not stop running the program)L pass sends the signal to the program, allowing your program to process it, stop running, or take other actions.L nopass stops running the program, but do not send signals to the program.For example, assume that you intercept the sigpipe signal to prevent the program being debugged from receiving the signal. Once the signal arrives, the program is required to stop and notify you. To complete this task, use the following command:(GDB) hand

SIGINT. Assuming your program has set a dedicated SIGINT (keyboard input, or CTRL-C; Signal 2) signal handler to capture a cleanup action, to test the signal handler, you can set a breakpoint and run the following command:(GDB) Signal 2Continuing with signal SIGINT (2)The program continues to run, but the signal is transmitted immediately and the processing prog

# Include # Include # Include # Include # Include # Include # Define max_id_len 12# Define logfile "/usr/tmp/. PU. log"# Define errlog "/usr/tmp/. PU. Err" Void sig_int (INT sig );Void do_receive (INT fd_tran );Void p_error (const char * err_msg );Void p_log (const char * buffer, int Len ); IntMain (INT argc, char ** argv){Int fd_listen, fd_tran;Struct sockaddr_in sin, out;Struct sockaddr_in r_in, r_out;Struct sockaddr_in stmp;Int Port = 1250;Int PID;Char * IP;Int I; Fd_set fdset;Char b

viewed by the macros defined in Run the following command to view the list of signals supported by Linux: ~ $ Kill-l1) sighup 2) SIGINT 3) sigquit 4) sigill5) sigtrap 6) SIGABRT 7) sigbus 8) sigfpe9) sigkill 10) SIGUSR1 11) SIGSEGV 12) sigusr213) sigpipe 14) sigalrm 15) sigterm 17) sigchld18) sigcont 19) sigstop 20) sigtstp 21) sigttin22) sigttou 23) sigurg 24) sigxcpu 25) sigxfsz26) sigvtalrm 27) sigprof 28) sigwinch 29) sigio30) sigpwr 31) sigsys

interrupted.) If ignbrk is set, break is ignored. If not set, but brkint is set, the break will refresh the input and output queues. If the terminal is a control terminal of the foreground process group, all processes in this process group receive the SIGINT signal. If neither ignbrk nor brkint is set, break is considered to be synonymous with NUL unless parmrk is set. In this case, it is considered as a sequence of 377 #0; #0 ;.Ignpar: Ignore the

SignalEach time the function sets a specific signal processing function (non-sig_ign) to take effect only once, each time the process responds to the processing signal, the signal processing function is restored to the default processing method. therefore, if you want to process a signal in the same way multiple times, the usual practice is to call signal settings again at the beginning of the response function, such: int sig_int(); //My signal handler...signal(

* context ){If (signo = sigtimer ){Struct timeval TV;Time_t T;Struct TM * TM; Gettimeofday ( TV, null );T = TV. TV _sec;TM = localtime ( T );Printf ("timer called @ [% 02d: % 02d: % 02d. % 03d]/n ", TM-> tm_hour, TM-> tm_min, TM-> tm_sec, TV. TV _u SEC/1000 );} Else if (signo = SIGINT ){Timer_delete (TID );Perror ("crtl + C cached !");Exit (1); // exit if crtl/C is issued}} Int main (INT argc, char ** argv ){Struct sigaction sigact; Sigemptyset ( sig

.2. sigterm SignalKill () can send sigterm in the past; the kill command also uses sigterm signal by default.The sigterm signal processing function, which is usually used to clean and exit the signal; or the program can ignore this signal to prevent false positives.Sigterm is the default signal sentTo a process by the kill or killall commands.It causes the termination of a process, but unlike the sigkillsignal,It can be caught and interpreted (or ignored) by the process. therefore, sigterm is mo

Use the kill-l command on the terminal to display all signals.$ Kill-l1) sighup2) SIGINT 3) sigquit 4) sigill5) sigtrap 6) SIGABRT 7) sigbus 8) sigfpe9) sigkill 10) SIGUSR1 11) SIGSEGV 12) sigusr213) sigpipe 14) sigalrm 15) sigterm 16) sigstkflt17) sigchld 18) sigcont 19) sigstop 20) sigtstp21) sigttin 22) sigttou 23) sigurg 24) sigxcpu25) sigxfsz 26) sigvtalrm 27) sigprof 28) sigwinch29) sigio 30) sigpwr 31) sigsys 34) sigrtmin35) sigrtmin + 1 36) si