int
main()
{
int fd;
fd=open("txt",O_RDWR | O_CREAT);
char s[]="first write";
if(fd==-1)
printf("open error\n");
if(write(fd,s,sizeof(s))<0)
{
close(fd);
printf("first write error\n");
}
if(write(fd,"second write",13)<0){
close(fd);
printf("second write error\n");
}
set_fl(fd,O_APPEND);
if(write(fd,"third write",12)<0){
close(fd);
printf("third write error\n");
}
printf("sdfsadf\n");
close(fd);
}
int main(void)
{
int ntowrite, nwrite;
char *ptr;
ntowrite = read(STDIN_FILENO, buf, sizeof(buf));
fprintf(stderr, "read %d bytes\n", ntowrite);
set_fl(STDOUT_FILENO, O_NONBLOCK); /* set nonblocking */
ptr = buf;
while (ntowrite > 0) {
errno = 0;
nwrite = write(STDOUT_FILENO, ptr, ntowrite);
fprintf(stderr, "nwrite = %d, errno = %d\n", nwrite, errno);
if (nwrite > 0) {
ptr += nwrite;
ntowrite -= nwrite;
}
}
clr_fl(STDOUT_FILENO, O_NONBLOCK); /* clear nonblocking */
exit(0);
}
int main(void)
{
int ntowrite = 0;
int nwrite = 0;
char *ptr = NULL;
ntowrite = read(STDIN_FILENO, buf, sizeof(buf));
fprintf(stderr, "reawd %d bytes\n", ntowrite);
set_fl(STDOUT_FILENO, O_NONBLOCK); //设置为非阻塞
ptr = buf;
while(ntowrite > 0)
{
errno = 0;
nwrite = write(STDOUT_FILENO, ptr, ntowrite);
fprintf(stderr, "nwrite = %d, errno = %d\n", nwrite, errno);
if (nwrite > 0)
{
ptr += nwrite;
ntowrite -= nwrite;
}
}
clr_fl(STDOUT_FILENO, O_NONBLOCK); //清除
exit(0);
}
void fcntlTestGETFL_SETFL() {
int fd = open("/tmp/a.txt", O_RDWR | O_APPEND);
if (-1 == fd) {
perror("open error");
}
// get file status
int val;
if ((val = fcntl(fd, F_GETFL, 0)) < 0)
perror("fcntl F_GETFL error");
if (val & O_APPEND)
printf("append\n");
if (val & O_NONBLOCK)
printf("nonblock\n");
set_fl(fd, O_NONBLOCK); // set O_NONBLOCK
clr_fl(fd, O_APPEND); // clear O_APPEND
// get file status now
if ((val = fcntl(fd, F_GETFL, 0)) < 0)
perror("fcntl F_GETFL error");
printf("after set O_NONBLOCK and clear O_APPEND\n");
if (val & O_APPEND)
printf("append\n");
if (val & O_NONBLOCK)
printf("nonblock\n");
}
void LightSettings::saveConfig()
{
// safe call, always one selected.
powerTypeChanged( b->powerSource->currentIndex() );
// Set settings for current power source
if ( powerStatus.wallStatus() == QPowerStatus::Available )
currentMode = &externalMode;
else
currentMode = &batteryMode;
QSettings cfg("Trolltech","qpe");
cfg.beginGroup("LockPower");
writeMode(cfg, &lockMode);
cfg.endGroup();
cfg.beginGroup("BatteryPower");
writeMode(cfg, &batteryMode);
cfg.endGroup();
cfg.beginGroup("ExternalPower");
writeMode(cfg, &externalMode);
cfg.sync();
int i_dim = (currentMode->dim ? currentMode->intervalDim : 0);
int i_lightoff = (currentMode->lightoff ? currentMode->intervalLightOff : 0);
int i_suspend = (currentMode->suspend ? currentMode->intervalSuspend : 0);
set_fl(currentMode->brightness);
QtopiaServiceRequest e("QtopiaPowerManager", "setIntervals(int,int,int)" );
e << i_dim << i_lightoff << i_suspend;
e.send();
}
int
main(int argc, char *argv[])
{
int fd;
pid_t pid;
char buf[5];
struct stat statbuf;
if (argc != 2) {
fprintf(stderr, "usage: %s filename\n", argv[0]);
exit(1);
}
if ((fd = open(argv[1], O_RDWR | O_CREAT | O_TRUNC, FILE_MODE)) < 0)
err_sys("open error");
if (write(fd, "abcdef", 6) != 6)
err_sys("write error");
/* turn on set-group-ID and turn off group-execute */
if (fstat(fd, &statbuf) < 0)
err_sys("fstat error");
if (fchmod(fd, (statbuf.st_mode & ~S_IXGRP) | S_ISGID) < 0)
err_sys("fchmod error");
TELL_WAIT();
if ((pid = fork()) < 0) {
err_sys("fork error");
} else if (pid > 0) { /* parent */
/* write lock entire file */
if (write_lock(fd, 0, SEEK_SET, 0) < 0)
err_sys("write_lock error");
TELL_CHILD(pid);
if (waitpid(pid, NULL, 0) < 0)
err_sys("waitpid error");
} else { /* child */
WAIT_PARENT(); /* wait for parent to set lock */
set_fl(fd, O_NONBLOCK);
/* first let's see what error we get if region is locked */
if (read_lock(fd, 0, SEEK_SET, 0) != -1) /* no wait */
err_sys("child: read_lock succeeded");
printf("read_lock of already-locked region returns %d\n",
errno);
/* now try to read the mandatory locked file */
if (lseek(fd, 0, SEEK_SET) == -1)
err_sys("lseek error");
if (read(fd, buf, 2) < 0)
err_ret("read failed (mandatory locking works)");
else
printf("read OK (no mandatory locking), buf = %2.2s\n",
buf);
}
exit(0);
}
int main(int argc,char ** argv)
{
int fd;
pid_t pid;
char buf[5];
struct stat statbuf;
if(argc!=2)
{
fprintf(stderr,"usage:%s filename \n",argv[0]);
exit(1);
}
if((fd=open(argv[1],O_RDWR|O_CREAT|O_TRUNC,FILE_MODE))<0)
err_sys("open error");
if(write(fd,"abcdef",6)<0)
err_sys("write error");
if(fstat(fd,&statbuf)<0)
err_sys("fstat error");
if(fchmod(fd,(statbuf.st_mode & ~S_IXGRP)|S_ISGID)<0)
err_sys("fchmod error");
TELL_WAIT();
if((pid=fork())<0)
err_sys("fork error");
else if(pid>0)
{
if(write_lock(fd,0,SEEK_SET,0)<0)
err_sys("write_lock error");
TELL_CHILD(pid);
if(waitpid(pid,NULL,0)<0)
err_sys("waitpid error");
}
else
{
WAIT_PARENT();
set_fl(fd,O_NONBLOCK);
if(read_lock(fd,0,SEEK_SET,0)!=-1)
err_sys("child read_lock successed ");
printf("read_lock of arleady-locked region return %d \n",errno);
if(lseek(fd,0,SEEK_SET)==-1)
err_sys("lseek error");
if(read(fd,buf,2)<0)
err_ret("read failed (mandatory locking works )");
else
printf("read OK(no mandatory locking ,buf=%2.2s\n)",buf);
exit(0);
}
}
int main()
{
int fd;
int flags;
if((fd = open("1.txt", O_RDONLY)) < 0)
{
err_sys("open error\n");
}
flags = O_WRONLY;
set_fl(fd, flags);
return;
}
int
socket_connect_nb(int sockfd, struct sockaddr *addr)
{
int ret;
set_fl(sockfd, O_NONBLOCK);
errno = 0;
ret = socket_connect(sockfd, addr);
if (ret == -1) {
switch(errno) {
case EWOULDBLOCK:
return -2;
}
}
return ret;
}
void LightSettings::applyBrightness()
{
// slot called, but we haven't changed the powerMode values yet
currentMode->brightness = b->brightness->value();
set_fl(currentMode->brightness);
QSettings config("Trolltech", "qpe");
if (currentMode == &lockMode)
config.beginGroup("LockPower");
else if (currentMode == &batteryMode)
config.beginGroup("BatteryPower");
else
config.beginGroup("ExternalPower");
config.setValue("Brightness", (currentMode->brightness * 255 + qpe_sysBrightnessSteps()/2) / qpe_sysBrightnessSteps());
}
int
main(void)
{
int n;
char buf[BUFSIZE];
set_fl(STDOUT_FILENO, O_SYNC);
if ( (n = read(STDIN_FILENO, buf, BUFSIZE)) < 0 )
err_sys("read error");
if (write(STDERR_FILENO, buf, n) != n)
err_sys("write error");
exit(0);
}
int main(){
int i, n;
int fd[2];
if(pipe(fd) < 0)
err_sys("pipe error");
set_fl(fd[1], O_NONBLOCK);
for(n = 0;; n++){
if((i = write(fd[1], "a", 1)) != 1){
printf("write ret %d, ", i);
break;
}
}
printf("pipe capacity = %d\n", n);
exit(0);
}
int main(void)
{
int i, n;
int fd[2];
if (pipe(fd) < 0)
err_sys("pipe error");
set_fl(fd[1], O_NONBLOCK);
/* write 1 byte at a time until pipe is full */
for (n=0;;n++) {
if ((i = write(fd[1], "a", 1)) != 1) {
printf("write ret %d, ", i);
break;
}
}
printf("pipe capacity = %d\n", n);
exit(0);
}
/* get pipesize */
int main(void)
{
int fd[2];
int cnt;
cnt = 0;
Pipe(fd);
set_fl(fd[1], O_NONBLOCK);
fprintf(stderr, "PIPE_BUF: %d\n", PIPE_BUF);
errno = 0;
while(write(fd[1], "a", 1) != -1)
cnt++;
if (errno == EAGAIN)
fprintf(stderr, "call would block (EAGAIN). cnt: %d)\n",cnt);
else
fprintf(stderr, "got another error: %d %s\n", errno, strerror(errno));
return 0;
}
static void transfer(const char *infile, const char *outfile) {
int count;
int rcount = 0;
int wcount = 0;
int flag = O_WRONLY | O_CREAT;
//if (wrdisk)
// flag |= O_EXCL; // ensure not rewrite exist file
if (infile && (infd = open(infile, O_RDONLY)) < 0) {
err_sys("open '%s' error", infile);
}
assert(outfile != NULL);
if (outfile && (outfd = open(outfile, flag, S_IRUSR | S_IWUSR)) < 0) {
err_sys("open '%s' error", outfile);
}
if (bSync)
set_fl(outfd, O_SYNC);
while ((count = read(infd, buf, bufSize)) > 0) {
rcount += count;
if (count != write(outfd, buf, count)){
err_ret("write error");
break;
}
if (bFsync)
fsync(outfd);
if (bFdatasync)
fdatasync(outfd);
wcount += count;
}
if (count < 0)
err_ret("read error");
printf("r: %d, w: %d.\n", rcount, wcount);
}
int main(int argc, char* argv[]) {
if (argc != 2) {
fprintf(stderr, "Usage: %s <filename>\n", argv[1]);
exit(1);
}
int fd;
fd = open(argv[1], O_RDWR | O_CREAT | O_TRUNC, FILE_MODE);
write(fd, "abcdef", 6);
struct stat statbuf;
fstat(fd, &statbuf);
fchmod(fd, (statbuf.st_mode & ~S_IXGRP) | S_ISGID);
tell_wait();
pid_t pid;
pid = fork();
if (pid > 0) {
write_lock(fd, 0, SEEK_SET, 0);
tell_child(pid);
waitpid(pid, NULL, 0);
} else {
wait_parent();
set_fl(fd, O_NONBLOCK);
if (read_lock(fd, 0, SEEK_SET, 0) != -1)
err_sys("child: read_lock successed");
printf("read_lock of already-locked region returns %d\n", errno);
lseek(fd, 0, SEEK_SET);
char buf[5];
if (read(fd, buf, 2) < 0)
err_ret("read failed (mandatory locking works)");
else
printf("read OK (no mandatory locking), buf = %2.2s\n", buf);
}
}
int main(void) {
int ntowrite, nwrite;
char *ptr;
// 标准输入输出已打开，没必要open
// 直接从标准输入读取数据(这里注意，遇到回车read将返回)
ntowrite = read(STDIN_FILENO, buf, sizeof(buf));
fprintf(stderr, "read %d bytes\n", ntowrite);
// 设置非阻塞
set_fl(STDOUT_FILENO, O_NONBLOCK);
ptr = buf;
while (ntowrite > 0) {
errno = 0;
nwrite = write(STDOUT_FILENO, ptr, ntowrite);
fprintf(stderr, "nwrite = %d, errno = %d\n", nwrite, errno);
if (nwrite > 0) {
ptr += nwrite;
ntowrite -= nwrite;
}
}
}
int main(int argc,char **argv)
{
int val;
if(2 != argc)
err_quit("usage: a.out <descriptor#>");
set_fl(STDOUT_FILENO,O_SYNC);
if((val = fcntl(atoi(argv[1]),F_GETFL,0)) < 0)
err_sys("fcntl error for fd %d",atoi(argv[1]));
switch(val & O_ACCMODE)
{
case O_RDONLY:
printf("read only");
break;
case O_WRONLY:
printf("write only");
break;
case O_RDWR:
printf("write read");
break;
default:
err_dump("unknow access mode");
}
if(val & O_APPEND)
printf(", append");
if(val & O_NONBLOCK)
printf(", nonblocking");
#if defined(O_SYNC)
if(val & O_SYNC)
printf(", synchronous writes");
#endif
#if !defined(_POSIX_C_SOURCE) && defined(O_SFYNC)
if(val & O_FSYNC)
printf(", synchronous writes");
#endif
putchar('\n');
return 0;
}
int main()
{
int ntowrite, nwrite;
char *ptr;
ntowrite = read(STDIN_FILENO, buf, sizeof(buf));
fprintf(stderr, "прочитано %d байт\n", ntowrite);
set_fl(STDOUT_FILENO, O_NONBLOCK);
ptr = buf;
while (ntowrite > 0) {
errno = 0;
nwrite = write(STDOUT_FILENO, ptr, ntowrite);
fprintf(stderr, "nwrite = %d, errno = %d\n", nwrite, errno);
if (nwrite > 0) {
ptr += nwrite;
ntowrite = nwrite;
}
}
clr_fl(STDOUT_FILENO, O_NONBLOCK);
exit(0);
}
int main()
{
for(int i=0; i<500000; ++i) {
buf[i] = 'a';
}
buf[499999] = 0;
int ntowrite=499999, nwrite;
char *ptr=buf;
set_fl(STDOUT_FILENO, O_NONBLOCK);
while(ntowrite>0) {
errno = 0;
nwrite = write(STDOUT_FILENO, ptr, ntowrite);
fprintf(stderr, "nwrite = %d, errno = %d",nwrite, errno);
if(errno!=0) perror("");
else fprintf(stderr,"\n");
if(nwrite>0) {
ntowrite -= nwrite;
ptr += nwrite;
}
}
clr_fl(STDOUT_FILENO, O_NONBLOCK);
return 0;
}
int main(int argc, const char *argv[])
{
int ntowrite, nwrite;
char *ptr;
ntowrite = read(STDIN_FILENO, buf, sizeof(buf));
fprintf(stderr, "read %d bytes\n", ntowrite);
set_fl(STDOUT_FILENO, O_NONBLOCK); /* set nonblocking */
ptr = buf;
while (ntowrite > 0) {
errno = 0;
nwrite = write(STDOUT_FILENO, ptr, ntowrite);
fprintf(stderr, "nwrite = %d, errno = %d\n", nwrite, errno);
if (ntowrite > 0) {
ptr += nwrite;
ntowrite -= nwrite;
}
}
return 0;
}
int main() {
int ntowrite, nwrite;
char *ptr;
ntowrite = read(STDIN_FILENO, buf, sizeof(buf));
fprintf(stderr, "read %d bytes\n", ntowrite);
set_fl(STDOUT_FILENO, O_NONBLOCK);
ptr = buf;
while(ntowrite > 0) {
errno = 0;
nwrite = write(STDOUT_FILENO, ptr, ntowrite);
fprintf(stderr,
"nwrite = %d, errno = %s\n", nwrite, strerror(errno));
if (nwrite > 0) {
ptr += nwrite;
ntowrite -= nwrite;
}
}
clr_fl(STDOUT_FILENO, O_NONBLOCK);
return 0;
}
void LightSettings::reject()
{
// Set settings for current power source
if ( powerStatus.wallStatus() == QPowerStatus::Available )
currentMode = &externalMode;
else
currentMode = &batteryMode;
set_fl(currentMode->initBrightness);
// Restore brightness settings
QSettings config("Trolltech", "qpe");
config.beginGroup("LockPower");
config.setValue("Brightness", (batteryMode.initBrightness * 255 + qpe_sysBrightnessSteps()/2) / qpe_sysBrightnessSteps());
config.endGroup();
config.beginGroup("BatteryPower");
config.setValue("Brightness", (batteryMode.initBrightness * 255 + qpe_sysBrightnessSteps()/2) / qpe_sysBrightnessSteps());
config.endGroup();
config.beginGroup("ExternalPower");
config.setValue("Brightness", (externalMode.initBrightness * 255 + qpe_sysBrightnessSteps()/2) / qpe_sysBrightnessSteps());
config.endGroup();
QDialog::reject();
}
static void process_list(DNODEPTR l_list)
{
DNODEPTR trav;
char child_buf[MAXHOST+1] = {0};
char dns_buf[MAXHOST+1] = {0};
int i;
int pid;
int nof_children = 0;
fd_set rd_set;
struct sigaction sigChildAction;
sigChildAction.sa_handler = sigChild;
sigChildAction.sa_flags = SA_NOCLDSTOP|SA_RESTART;
sigemptyset(&sigChildAction.sa_mask);
raiseSigChild = 0;
sigaction(SIGCHLD, &sigChildAction, NULL);
/* fire up our child processes */
for(i=0; i < dns_children; i++)
{
if(pipe(child[i].inpipe))
{
if (verbose) fprintf(stderr,"INPIPE creation error");
return; /* exit(1) */
}
if(pipe(child[i].outpipe))
{
if (verbose) fprintf(stderr,"OUTPIPE creation error");
return; /* exit(1); */
}
/* fork it off */
switch(pid=fork())
{
case -1:
{
if (verbose) fprintf(stderr,"FORK error");
return; /* exit(1); */
}
case 0: /* Child */
{
int size;
struct hostent *res_ent;
close(child[i].inpipe[0]);
close(child[i].outpipe[1]);
/* get struct in_addr here */
while((size = read(child[i].outpipe[0], child_buf, MAXHOST)))
{
if(size < 0)
{
perror("read error");
exit(1);
}
else
{
if(debug_mode)
printf("Child got work: %lx(%d)\n",
*((unsigned long *)child_buf), size);
if((res_ent = gethostbyaddr(child_buf, size, AF_INET)))
{
/* must be at least 4 chars */
if (strlen(res_ent->h_name)>3)
{
if(debug_mode)
printf("Child got %s for %lx(%d), %d bytes\n",
res_ent->h_name,
*((unsigned long *)child_buf),
size,strlen(res_ent->h_name));
/* If long hostname, take max domain name part */
if ((size = strlen(res_ent->h_name)) > MAXHOST)
strcpy(child_buf,(res_ent->h_name+(size-MAXHOST)));
else strcpy(child_buf, res_ent->h_name);
size = strlen(child_buf);
}
else
{
if (debug_mode)
printf("gethostbyaddr returned bad h_name!\n");
}
}
else
{
if(debug_mode)
printf("gethostbyaddr returned NULL! (%d)\n",h_errno);
}
if (write(child[i].inpipe[1], child_buf, size) == -1)
{
perror("write error");
exit(1);
}
}
}
close(child[i].inpipe[1]);
close(child[i].outpipe[0]);
if(debug_mode)
printf( "Child %d got closed input, shutting down\n", i);
fflush(stdout);
exit(0);
} /* case 0 */
default:
{
child[i].pid = pid;
child[i].flags = DNS_CHILD_READY|DNS_CHILD_RUNNING;
nof_children++;
close(child[i].inpipe[1]);
close(child[i].outpipe[0]);
set_fl(child[i].inpipe[0], O_NONBLOCK);
}
}
}
trav = l_list;
while(nof_children)
{
static struct timeval selectTimeval;
int res;
int max_fd;
FD_ZERO(&rd_set);
max_fd = 0;
if(raiseSigChild)
{
int pid;
while((pid = waitpid(-1, NULL, WNOHANG)) > 0)
{
for(i=0;i<dns_children;i++)
{
if(child[i].pid == pid)
{
child[i].pid = 0;
child[i].flags &= ~(DNS_CHILD_READY|DNS_CHILD_RUNNING);
nof_children--;
if(debug_mode)
printf("Reaped Child %d\n", pid);
break;
}
}
}
raiseSigChild--;
continue; /* while, nof children has just changed */
}
for(i=0;i<dns_children;i++)
{
if(child[i].flags & DNS_CHILD_RUNNING) /* Child is running */
{
if(child[i].flags & DNS_CHILD_READY)
{
child[i].flags &= ~DNS_CHILD_READY;
if(trav) /* something to resolve */
{
if (write(child[i].outpipe[1], &(trav->addr.s_addr),
sizeof(trav->addr.s_addr)) != -1)
{
/* We will watch this child */
child[i].cur = trav;
FD_SET(child[i].inpipe[0], &rd_set);
max_fd = MAX(max_fd, child[i].inpipe[0]);
if(debug_mode)
printf("Giving %s (%lx) to Child %d for resolving\n",
child[i].cur->string,
(unsigned long)child[i].cur->addr.s_addr, i);
trav = trav->llist;
}
else /* write error */
{
if(errno != EINTR) /* Could be a signal */
{
perror("Could not write to pipe");
close(child[i].outpipe[1]); /* kill */
child[i].flags &= ~DNS_CHILD_RUNNING; /* child */
}
}
}
else /* List is complete */
{
close(child[i].outpipe[1]); /* Go away */
child[i].flags &= ~DNS_CHILD_RUNNING; /* Child is dead */
}
}
else
{
/* Look, the busy child... */
FD_SET(child[i].inpipe[0], &rd_set);
max_fd = MAX(max_fd, child[i].inpipe[0]);
}
}
}
selectTimeval.tv_sec = 5; /* This stuff ticks in 5 second intervals */
selectTimeval.tv_usec = 0;
switch(res = select(max_fd+1, &rd_set, NULL, NULL, &selectTimeval))
{
case -1:
{
if(errno != EINTR) /* Could be a signal */
perror("Error in select");
break;
}
case 0: /* Timeout, just fall once through the child loop */
{
if(debug_mode)
printf("tick\n");
break;
}
default:
{
for(i=0; i< dns_children;i++)
{
if(!res) /* All file descriptors done */
break;
if(FD_ISSET(child[i].inpipe[0], &rd_set))
{
int size;
res--; /* One less... */
if(debug_mode)
printf("Work requested from Child %d\n", i);
switch (size=read(child[i].inpipe[0], dns_buf, MAXHOST))
{
case -1:
{
if(errno != EINTR)
perror("Could not read from pipe");
break;
}
case 0:
{
/* EOF. Child has closed Pipe. It shouldn't have */
/* done that, could be an error or something. */
/* Reap it */
close(child[i].outpipe[1]);
child[i].flags &= ~DNS_CHILD_RUNNING;
if(debug_mode)
printf("Child %d wants to be reaped\n", i);
break;
}
default:
{
dns_buf[size] = '\0';
if(memcmp(dns_buf, &(child[i].cur->addr.s_addr),
sizeof(child[i].cur->addr.s_addr)))
{
if(debug_mode)
printf("Got a result (%d): %s -> %s\n",
i, child[i].cur->string, dns_buf);
db_put(child[i].cur->string, dns_buf, 0);
}
else
{
if(debug_mode)
printf("Could not resolve (%d): %s\n",
i, child[i].cur->string);
/*
db_put(child[i].cur->string,child[i].cur->string,1);
*/
}
if(debug_mode)
printf("Child %d back in task pool\n", i);
/* Child is back in the task pool */
child[i].flags |= DNS_CHILD_READY;
break;
}
}
}
}
break;
}
}
}
return;
}
void set_nonblock(int fd)
{
set_fl(fd, O_NONBLOCK);
}
int do_loop(void) {
int efd;
int sfd;
int rc;
int connfd;
struct epoll_event event;
struct epoll_event *events;
tor_array_t *cache_sock;
cache_sock = tor_array_new(TOR_MAX_EVENT, sizeof(http_context *));
events = calloc(TOR_MAX_EVENT, sizeof(struct epoll_event));
if (!events) {
perror("");
exit(EXIT_FAILURE);
}
rc = 0;
sfd = create_and_bind(INADDR_ANY, config.port);
if (sfd < 0) {
exit(EXIT_FAILURE);
}
rc = set_fl(sfd, O_NONBLOCK);
if (rc < 0) {
exit(EXIT_FAILURE);
}
rc = listen(sfd, 10);
if (rc < 0) {
perror("listen");
exit(EXIT_FAILURE);
}
efd = epoll_create1(0);
if (efd < 0) {
perror("");
exit(EXIT_FAILURE);
}
if (fd_add(efd, sfd) < 0)
exit(EXIT_FAILURE);
int i, n;
http_context *http;
for (;;) {
n = epoll_wait(efd, events, TOR_MAX_EVENT, -1);
for (i = 0; i < n; i++) {
if ((events[i].events & EPOLLERR) ||
(events[i].events & EPOLLHUP) ||
!(events[i].events & EPOLLIN)) {
close(events[i].data.fd);
tor_log_err("epoll error %d\n", events[i].data.fd);
} else if (events[i].data.fd == sfd) {
for (;;) {
connfd = accept(sfd, NULL, NULL);
if (connfd == -1) {
if ((errno != EAGAIN) &&
(errno != EWOULDBLOCK)) {
perror("accept");
}
break;
}
if (set_fl(connfd, O_NONBLOCK) < 0) {
perror("set_fl");
exit(EXIT_FAILURE);
}
if (fd_add(efd, connfd) < 0) {
perror("fd_add");
exit(EXIT_FAILURE);
}
http = http_new(connfd, list_dir, sock_read, writen_nonblock);
fprintf(stderr, "put fd = %d:sfd = %d http = %p\n", connfd, sfd, http);
tor_array_put(cache_sock, connfd, &http);
}
} else {
fprintf(stderr, "get fd = %d\n", events[i].data.fd);
http = *(http_context **)tor_array_get(cache_sock, events[i].data.fd);
fprintf(stderr, "fd = %d\n", http->fd);
http_read_head(http);
do_process(http);
http_free(http);
}
}
fprintf(stderr, "=============\n");
}
close(sfd);
close(efd);
}
/* ----- the main ----- */
main(int argc, char *argv[])
{
char buf[BUF_SIZE];
int n;
int fVerbose;
struct sigaction act;
struct sigaction oldActInt; /* old handler for SIGINT */
struct sigaction oldActQuit; /* old handler for SIGQUIT */
/* handle command line args, a very simple-minded approach */
if (argc == 1)
{ /* no verbose flag ? */
fVerbose = 0;
}
else if (argc == 2 && *argv[1] == '-' && *(argv[1]+1) == 'v')
{ /* need verbose flag */
fVerbose = 1;
}
else
{ /* wront command line */
printf("Usage: %s [-v]", argv[0]);
exit(0);
}
/* fill in the act */
act.sa_handler = sigHandler; /* point to the signal handler */
sigemptyset(&act.sa_mask); /* mask nothing */
act.sa_flags = SA_RESTART; /* restart interrupted system call */
/* install SIGINT handler */
if (sigaction(SIGINT, &act, &oldActInt) < 0)
{
perror("Failed to install handler for signal SIGINT");
exit(-1);
}
/* install SIGQUIT handler */
if (sigaction(SIGQUIT, &act, &oldActQuit) < 0)
{
perror("Failed to install handler for signal SIGQUIT");
exit(-1);
}
/* make the stdin non-blocking */
set_fl(STDIN_FILENO, O_NONBLOCK);
write(STDOUT_FILENO, promptStr, sizeof(promptStr));
/* loop forever */
while (!fExit)
{
/* read from stdin, but can not be blocked */
if ((n = read(STDIN_FILENO, buf, BUF_SIZE)) < 0)
{
/* just no data ? */
if (errno == EAGAIN)
{
/* no input, sleep 1 to save the CPU cycle */
sleep(1);
/* for debug purpose */
if (fVerbose)
{
write(STDOUT_FILENO, ".", 1);
}
}
else {
perror("read failed");
exit(-1);
}
}
/* got something from the user */
else
{
/* write to stdout whatever we read in */
write(STDOUT_FILENO, buf, n);
/* start with 'q' */
if (buf[0] == 'q')
{
fExit = 1;
}
else
{
write(STDOUT_FILENO, promptStr, sizeof(promptStr));
}
}
}
/* restore signal handlers */
sigaction(SIGINT, &oldActInt, NULL);
sigaction(SIGQUIT, &oldActQuit, NULL);
/* make the stdio blocking, again !!! */
clr_fl(STDIN_FILENO, O_NONBLOCK);
fflush(stdout);
}
