nginx學習筆記 main模板

nginx在unix系統中能設定程序標題，這是乙個很酷炫的功能，看看是怎麼實現的呢

#ifdef __unix__

/* * memory layout
* ar**[0]\0ar**[1]\0ar**[n]\0env[0]\0env[1]\0env[n]\0
*/void setproctitle(const char* title) 
#endif

// unix short style

static char options = "hvc:ts:d";
static char detail_options = "\
-h : print help\n\
-v : print version\n\
-c confile : set configure file, default etc/$.conf\n\
-t : test configure file and exit\n\
-s signal : send signal to process\n\
signal=[start, stop, restart, status]\n\
-d : daemon\n\
";void print_version() 
void print_help() 
#define invalid_option -1
#define flag_option 1
#define parma_option 2
int get_option(char opt) 
int parse_cmdline(int argc, char** ar**) 
while (*++p) else if (ar**[i+1] != null) else }}
++i;
next_option:
continue;
}return 0;
}

int create_pidfile() 

char pid[16] = ;
snprintf(pid, sizeof(pid), "%d\n", g_main_ctx.pid);
fwrite(pid, 1, strlen(pid), fp);
fclose(fp); atexit(delete_pidfile);
hlogd("create_pidfile [%s] pid=%d", g_main_ctx.pidfile, g_main_ctx.pid);
return 0;
}void delete_pidfile() 
pid_t getpid_from_pidfile() 
char pid[64];
int readbytes = fread(pid, 1, sizeof(pid), fp);
fclose(fp);
if (readbytes <= 0) 
return atoi(pid);
}

const char* signal = get_arg("s");

if (signal) 
} else if (strcmp(signal, "stop") == 0) else 
exit(0);
} else if (strcmp(signal, "restart") == 0) 
} else if (strcmp(signal, "status") == 0) else 
exit(0);
} else 
printf("%s start/running\n", g_main_ctx.program_name);
}

#ifdef __unix__

// unix use signal
// we use sigterm to quit process
#define signal_terminate sigterm
#include #define maxnum_worker 1024
static pid_t s_worker_processes[maxnum_worker];
void worker_process_cycle() ;
snprintf(proctitle, sizeof(proctitle), "%s: worker process", g_main_ctx.program_name);
setproctitle(proctitle);
while(1) 
}int create_worker_process(int worker_processes) 
if (pid == 0) 
for (int i = 0; i < maxnum_worker; ++i) }}
return 0;
}static int s_signo = 0;
void master_process_signal_handler(int signo) 
void master_process_init() 
}void master_process_cycle() ;
snprintf(proctitle, sizeof(proctitle), "%s: master process", g_main_ctx.program_name);
setproctitle(proctitle);
signal(sigint, master_process_signal_handler);
signal(sigchld, master_process_signal_handler);
signal(signal_terminate, master_process_signal_handler);
sigset_t sigset;
sigemptyset(&sigset);
sigaddset(&sigset, sigint);
sigaddset(&sigset, sigchld);
sigaddset(&sigset, signal_terminate);
sigprocmask(sig_block, &sigset, null);
create_worker_process(get_ncpu());
sigemptyset(&sigset);
while (1) 
msleep(1000);
exit(0);
break;
case sigchld:
}create_worker_process(1);}}
break;
default:
break;}}
}#endif

repo中提供了makefile檔案

編譯步驟如下：

make test

bin/test -d
ps aux | grep test

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