int main(int argc,char **argv)
{
int i,fd;
unsigned char c,*ptr;
struct stat stat;
if(argc!=2)
err_quit("usgae: shmread <name>");
fd=Shm_open(argv[1],O_RDONLY,FILE_MODE);
Fstat(fd,&stat);
ptr=Mmap(NULL,stat.st_size,PROT_READ,MAP_SHARED,fd,0);
Close(fd);
for(i=0;i<stat.st_size;i++)
if((c=*ptr++)!=(i%256))
err_ret("ptr[%d] =%d",i,c);
exit(0);
}
int
swap_straddr(char *src, char *dst)
{
char a[3];
int i, slen;
char *crow, *tmp, *atom;
int count = 0, offset = 0;
slen = strlen(src);
if (slen > DNS_MAX_HNAME_LEN)
goto mlf_addr;
tmp = src;
for (i = 0; i < 4; i++) {
count = 0;
atom = a;
while (*tmp && *tmp != '.') {
if (count > 2)
goto mlf_addr;
*atom++ = *tmp++;
count++;
}
if (!count)
goto mlf_addr;
crow = dst + slen - count - offset;
strncpy(crow, a, count);
offset += count;
if (!(*tmp))
break;
else {
if (i == 3)
goto mlf_addr;
*(crow - 1) = '.';
offset++;
tmp++;
}
}
*(dst + slen) = 0;
return 0;
mlf_addr:
debug(DBG_INSANE, "in swap_straddr: invalid address `%s`.\n", src);
err_ret(ERR_DNSMDD, -1);
}
/*
* Descend through the hierachy, starting at "fullpath".
* If "fullpath" is anything other than a directory, we lstat() it,
* recursively for each name in the directory.
*/
static int dopath(Func *func)
{
struct stat statbuf;
struct dirent *dirp;
DIR *dp;
int ret, n;
if (lstat(fullpath, &statbuf) < 0) /* stat error */
return (func(fullpath, &statbuf, FTW_NS));
if (S_ISDIR(statbuf.st_mode) == 0) /* not a directory */
return (func(fullpath, &statbuf, FTW_F));
/*
* It's a directory. First call func() for the directory,
* then process each filename in the directory.
*/
if ((ret = func(fullpath, &statbuf, FTW_D)) != 0)
return (ret);
n = strlen(fullpath);
if (n + NAME_MAX + 2 > pathlen) { /* expand path buffer */
pathlen *= 2;
if ((realloc(fullpath, pathlen)) == NULL)
err_sys("realloc failed");
}
fullpath[n++] = '/';
fullpath[n] = 0;
if ((dp = opendir(fullpath)) == NULL) /* cannot read directory */
return(func(fullpath, &statbuf, FTW_DNR));
while ((dirp = readdir(dp)) != NULL) {
if (strcmp(dirp->d_name, ".") == 0 ||
strcmp(dirp->d_name, "..") == 0)
continue; /* ignore dot and dot-dot */
strcpy(&fullpath[n], dirp->d_name); /* append after "/" */
if ((ret = dopath(func)) != 0)
break; /* time to leave */
}
fullpath[n-1] = 0; /* erase everything from slash onward */
if (closedir(dp) < 0)
err_ret("Cannot close dir: %s", fullpath);
return ret;
}
/*
* Descend through the hierarchy, starting at "fullpath".
* If "fullpath" is anything other than a directory, we lstat() it,
* call func(), and return. For a directory, we all ourself
* recursively for each name in the directory.
*/
static int dopath(Myfunc* func) /* we return whatever func() returns */
{
struct stat statbuf;
struct dirent *dirp;
DIR *dp;
int ret;
char *ptr;
if (lstat(fullpath, &statbuf) < 0) /* stat error */
return(func(fullpath, &statbuf, FTW_NS));
if (S_ISDIR(statbuf.st_mode) == 0) /* not a directory */
return(func(fullpath, &statbuf, FTW_F));
/*
* It's a directory. First call func() for the directory,
* then process each filename in the directory.
*/
if ((ret = func(fullpath, &statbuf, FTW_D)) != 0)
return(ret);
ptr = fullpath + strlen(fullpath); /* point to end of fullpath */
*ptr++ = '/';
*ptr = 0;
if ((dp = opendir(fullpath)) == NULL) /* can't read directory */
return(func(fullpath, &statbuf, FTW_DNR));
while ((dirp = readdir(dp)) != NULL) {
if (strcmp(dirp->d_name, ".") == 0 || strcmp(dirp->d_name, "..") == 0)
continue; /* ignore dot and dot-dot */
strcpy(ptr, dirp->d_name); /* append name after slash */
if ((ret = dopath(func)) != 0) /* recursive */
break; /* time to leave */
}
ptr[-1] = 0; /* erase everything from slash onward */
if (closedir(dp) < 0)
err_ret("can't close directory %s", fullpath);
return(ret);
}
int main (int argc, char **argv)
{
int fd;
int i;
if (argc < 2)
err_quit ("Usage: isastream file ...");
for (i = 1; i < argc; i++) {
if ((fd = open (argv [i], O_RDONLY)) == -1) {
err_ret ("Can't open %s", argv [i]);
continue;
}
printf ("%s %s a STREAMS device\n", argv [i],
(isastream (fd)) ? "is" : "is not");
}
return (0);
}
/*
* Takes a label: is there a ptr?
* Returns:
* -1 is a malformed label is found
* 0 if there's no pointer
* <offset from start_pkt> if a pointer is found
*/
int
getlblptr(char *buf)
{
uint16_t dlbl;
char c[2];
memcpy(c, buf, 2);
if (!LBL_PTR(*c)) /* No ptr */
return 0;
if (LBL_PTR(*c) != LBL_PTR_MASK) {
debug(DBG_INSANE, "In getlblptr: invalid octet %02x",
(unsigned char) c[0]);
err_ret(ERR_DNSMLO, -1);
}
(*c) &= LBL_PTR_OFF_MASK;
memcpy(&dlbl, c, 2);
dlbl = ntohs(dlbl);
return dlbl; /* offset */
}
int
delete_ntk_forward_chain(iptc_handle_t * t)
{
int res;
res = iptc_is_chain(NTK_MARK_CHAIN, *t);
if (!res)
return 0;
res = iptc_flush_entries(NTK_MARK_CHAIN, t);
if (!res)
goto cannot_delete;
res = iptc_delete_chain(NTK_MARK_CHAIN, t);
if (!res)
goto cannot_delete;
return 0;
cannot_delete:
error("In delete_ntk_forward_chain: -> %s", iptc_strerror(errno));
err_ret(ERR_NETDEL, -1);
}
int main(int argc, char *argv[])
{
int i;
struct stat buf;
for (i = 1; i < argc; i++) {
printf("%s: ", argv[i]);
if (stat(argv[i], &buf) < 0) {
err_ret("stat error");
continue;
}
printf("dev = %d/%d", major(buf.st_dev), minor(buf.st_dev));
if (S_ISCHR(buf.st_mode) || S_ISBLK(buf.st_mode)) {
printf(" (%s) rdev = %d/%d",
(S_ISCHR(buf.st_mode)) ? "character" : "block",
major(buf.st_dev), minor(buf.st_dev));
}
printf("/n");
}
exit(0);
}
/*
* Disassembles a DNS qst_section_set.
* Use the above function for each question section.
* -1 on error. Number of bytes readed on success.
* If -1 is returned, rcode ha sto be set to E_INTRPRT
*/
int
d_qsts_u(char *start_buf, char *buf, dns_pkt * dp, int limit_len)
{
int offset = 0, res;
int i, count;
if (!(count = DP_QDCOUNT(dp)))
return 0; /* No questions. */
for (i = 0; i < count; i++) {
if ((res =
d_qst_u(start_buf, buf + offset, dp,
limit_len - offset)) == -1) {
error(err_str);
err_ret(ERR_DNSMDD, -1);
}
offset += res;
}
return offset;
}
int main(int argc, char *argv[]) {
int i;
struct stat buf;
char *ptr;
for (i = 1; i < argc; i++) {
if (stat(argv[i], &buf) < 0) {
err_ret("lstat error");
continue;
}
if (S_ISREG(buf.st_mode) )
ptr = "regular";
else if (S_ISDIR(buf.st_mode) )
ptr = "directory";
printf("%s\n", ptr);
}
exit(0);
}
int main(void){
char buf[MAXLINE];
pid_t pid;
int status;
printf("%% ");
while(fgets(buf,MAXLINE,stdin)!=NULL){
buf[strlen(buf)-1]=0;
if((pid=fork())<0)
err_sys("fork error");
else if(pid==0){
execlp(buf,buf,(char*)0);
err_ret("could not execute:%s",buf);
exit(127);
}
if((pid=waitpid(pid,&status,0))<0)
err_sys("waitpid error");
printf("%% ");
}
exit(0);
}
int main(int argc, char const *argv[])
{
int apipe[2], len;
char buf[BUFSIZE];
if (pipe(apipe) == -1)
err_ret("pipe error", "");
printf("Got a pipe. It is descriptors: %d, %d\n", apipe[0], apipe[1]);
if ((fgets(buf, BUFSIZE, stdin)) != NULL)
{
write(apipe[1], buf, strlen(buf));
}
len = read(apipe[0], buf, BUFSIZE);
write(1, buf, len);
return 0;
}
int main(void)
{
STARTUPINFO si;
PROCESS_INFORMATION pi;
DWORD dwChildID = 0;
char szBuff[MAXLINE];
// Initialize data
ZeroMemory( &si, sizeof(si) );
si.cb = sizeof(si);
ZeroMemory( &pi, sizeof(pi) );
printf("%% "); /* print prompt (printf requires %% to print %) */
while (fgets(szBuff, MAXLINE, stdin) != NULL) {
szBuff[strlen(szBuff) - 1] = 0; /* replace newline with null */
/* Start the child process */
if ( ! CreateProcess(
NULL, // No module name (use command line)
szBuff, // Command line
NULL, // Process handle not inheritable
NULL, // Thread handle not inheritable.
FALSE, // Set handle inheritance to FALSE.
0, // No creation flags.
NULL, // Use parent's environment block.
NULL, // Use parent's starting directory.
&si, // Pointer to STARTUPINFO structure.
&pi ) // Pointer to PROCESS_INFORMATION struct
)
{
err_ret( "CreateProcess failed." );
}
/* parent */
/* wait for normal termination of child process */
WaitForSingleObject(pi.hProcess, INFINITE);
printf("%% ");
}
exit(0);
}
int main(int argc, char **argv)
{
char *ptr, **pptr;
char str[16]; /* ddd.ddd.ddd.ddd\0 */
struct hostent *hptr;
while (--argc > 0) {
ptr = *++argv;
if ((hptr = gethostbyname(ptr)) == NULL) {
err_msg("gethostbyname error for host: %s: %s",
ptr, hstrerror(h_errno));
continue;
}
printf("official hostname: %s\n", hptr->h_name);
for (pptr = hptr->h_aliases; *pptr != NULL; pptr++)
printf("\talias: %s\n", *pptr);
switch (hptr->h_addrtype) {
case AF_INET:
pptr = hptr->h_addr_list;
for (; *pptr != NULL; pptr++) {
printf("\taddress: %s\n",
Inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str)));
hptr = gethostbyaddr(*pptr, hptr->h_length, hptr->h_addrtype);
if (hptr == NULL)
err_msg("gethostbyaddr error: %s", hstrerror(h_errno));
else if (hptr ->h_name != NULL)
printf("\tname: %s\n", hptr->h_name);
else
printf("\t(no hostname returned by gethostbyaddr)\n");
}
break;
default:
err_ret("unknown address type");
break;
}
}
exit(0);
}
static int do_path(myfunc* func)
{
struct stat statbuf;
struct dirent *dirp;
DIR *dp;
int ret, n;
if (lstat(fullpath, &statbuf) < 0)
return(func(fullpath, &statbuf, FTW_NS));
if (S_ISDIR(statbuf.st_mode) == 0)
return(func(fullpath, &statbuf, FTW_F));
if ((ret = func(fullpath, &statbuf, FTW_D)) != 0)
return ret;
n = strlen(fullpath);
if (n + NAME_MAX + 2 > pathlen)
{
pathlen *= 2;
if ((fullpath = realloc(fullpath, pathlen)) == NULL)
err_sys("realloc failed");
}
fullpath[n++] = '/';
fullpath[n] = 0;
if ((dp = opendir(fullpath)) == NULL)
return(func(fullpath, &statbuf, FTW_DNR));
while ((dirp = readdir(dp)) != NULL)
{
if (strcmp(dirp->d_name, ".") == 0 ||
strcmp(dirp->d_name, "..") == 0)
continue;
strcpy(&fullpath[n], dirp->d_name);
if ((ret = do_path(func)) != 0)
break;
}
fullpath[n-1] = 0;
if (closedir(dp) < 0)
err_ret("cannot close directory %s", fullpath) ;
return ret;
}
int main (int argc,char **argv)
{
int i;
struct stat buf;
char *ptr;
for(i=1;i<argc;i++)
{
printf("%s: \n \t",argv[i]);
if(lstat(argv[i],&buf)<0)
{
err_ret("lstat error");
continue;
}
if(S_ISREG(buf.st_mode))
ptr="regular file";
else if(S_ISDIR(buf.st_mode))
ptr="directory file";
else if(S_ISCHR(buf.st_mode))
ptr="character special";
else if(S_ISBLK(buf.st_mode))
ptr="block special";
else if(S_ISFIFO(buf.st_mode))
ptr="fifo ";
else if(S_ISLNK(buf.st_mode))
ptr="symbolic link";
else if(S_ISSOCK(buf.st_mode))
ptr="socket";
else
ptr="** unknown mode **";
printf("%s\n",ptr);
}
exit(0);
}
int CXSPAsyncSocket::SocketEpollDel(const int sockfd, const int event)
{
EPOLLEVENT epollevent;
epollevent.data.fd = sockfd;
epollevent.events = event;
pthread_t thrid = pthread_self();
struct EpollWaitObject *pEwobj=NULL;
if(m_ThreadId2Ewobj.Find(thrid, pEwobj) == 0)
{
int ret = epoll_ctl(pEwobj->epollId, EPOLL_CTL_DEL, sockfd, &epollevent);
if(-1 == ret)
{
err_ret(GetLastError(ERROR_EPOLL_CTL));
return -1;
}
m_ThreadId2Ewobj.Set(thrid, pEwobj);
SafeDecreaseEvent();
return ret;
}
return -2;
}
int main(int argc, char **argv)
{
int i, fd;
struct stat stat;
unsigned char c, *ptr;
if (argc != 2)
err_quit("Usage: read <name>");
//open, get size, map
fd = Shm_open(argv[1], O_RDONLY, FILE_MODE);
Fstat(fd, &stat);
ptr = Mmap(NULL, stat.st_size, PROT_READ, MAP_SHARED, fd, 0);
Close(fd);
//check teh ptr[0] = 0, ptr[1] = 1, etc.
for (i = 0; i < stat.st_size; i++)
if ((c = *ptr++) != (i % 256))
err_ret("ptr[%d] = %d", i, c);
exit(0);
}
int main(int argc, char *argv[])
{
int fd, pid;
if ((pid = fork()) == -1)
err_ret("fork", "");
else if (pid == 0)
{
fd = open(argv[1], O_RDONLY);
close(0);
dup(fd);
close(fd);
execlp("sort", "sort", NULL);
}
else
{
wait(NULL);
}
return 0;
}
static int dopath(Myfunc* func)
{
struct stat statbuf;
struct dirent *dirp;
DIR *dp;
int ret;
char *ptr;
if(lstat(fullpath, &statbuf) < 0)
return (func(fullpath, &statbuf, FTW_NS));
if(S_ISDIR(statbuf.st_mode) == 0)//not a dir
return (func(fullpath, &statbuf, FTW_F));
//dir
if((ret = func(fullpath, &statbuf, FTW_D)) != 0)
return (ret);
//printf("%s_______fullpath_in_dopath\n", fullpath);
ptr = fullpath + strlen(fullpath);//point to end of path
*ptr++ = '/';//这里不需要了，fullpath=realpath,realpath后面有已经有'/'
//printf("after_/_fullpath______%s\n", fullpath);
*ptr = 0;
//if can't read dir
if ((dp = opendir(fullpath)) == NULL)
return (func(fullpath, &statbuf, FTW_DNR));
//read
while((dirp = readdir(dp)) != NULL)
{
if(strcmp(dirp->d_name, ".") == 0 || strcmp(dirp->d_name, "..") == 0)
continue;
strcpy(ptr, dirp->d_name);//append dname after '/'
if((ret = dopath(func)) != 0)//recursive 递归，循环
break;//time to leave
}
//ptr[-1] = 0;//erase everything from slash onwards ???
if(closedir(dp) < 0)
err_ret("can't close dir %s", fullpath);
return (ret);
}
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 i, size;
char *path;
if (chdir(MYHOME) < 0)
err_sys("chdir error");
for (i = 0; i < DEPTH; i++) {
if (mkdir(NAME, DIR_MODE) < 0)
err_sys("mkdir failed, i = %d", i);
if (chdir(NAME) < 0)
err_sys("chdir failed, i = %d", i);
}
if (creat("afile", FILE_MODE) < 0)
err_sys("creat error");
/*
* The deep directory is created, with a file at the leaf.
* Now let's try and obtain its pathname.
*/
path = path_alloc(&size);
// printf ( "Path Size %ld\n", size ) ;
for ( ; ; ) {
if (getcwd(path, size) != NULL)
break;
else {
err_ret("getcwd failed, size = %d", size);
size += 100;
if ( (path = realloc(path, size)) == NULL)
err_sys("realloc error");
}
}
printf("length = %d\n%s\n", strlen(path), path);
// printf("%s", path);
exit(0);
}
int
main(void)
{
char buf[MAXLINE]; /* from apue.h */
pid_t pid;
int status;
printf("%% "); /* print prompt (printf requires %% to print %) */
/* 读入一行, 每一行命令会产生一个子进程用于执行 */
while (fgets(buf, MAXLINE, stdin) != NULL) {
/* 去掉换行符 */
if (buf[strlen(buf) - 1] == '\n')
buf[strlen(buf) - 1] = 0; /* replace newline with null */
/* 执行读入的命令 */
/* fork创建一个子进程, 返回<0则表示fork发生了错误 */
if ((pid = fork()) < 0) {
err_sys("fork error");
/* 对于子进程, fork返回的pid=0(父进程fork返回的pid>0) */
} else if (pid == 0) { /* child */
/* 调用execlp以执行从标准输入读入的命令 */
/* fork+exec组合, 是某些操作系统所称的产生(spawn)一个新的进程 */
execlp(buf, buf, (char *)0);
err_ret("couldn't execute: %s", buf);
/* 退出 */
exit(127);
}
/* 父进程, 等待子进程终止 */
/* pid为子进程id, status为子进程终止状态(用于判断其实如何终止的) */
/* parent */
if ((pid = waitpid(pid, &status, 0)) < 0)
err_sys("waitpid error");
printf("%% ");
}
exit(0);
}
int main(int argc, const char *argv[])
{
struct sockaddr_in server_addr;
char buf[MAXLINE];
int n, sock_fd;
if(argc != 2)
err_sys("Usage ./server server_addr msg");
//int socket_r(int domain, int type, int protocol);
sock_fd = socket_r(AF_INET, SOCK_STREAM, 0);
memset(&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
//int inet_pton(int af, const char *src, void *dst);
inet_pton(AF_INET, argv[1], &server_addr.sin_addr);
server_addr.sin_port = htons(SERVER_PORT);
//void connect_r(int sockfd, const struct sockaddr *serv_addr, socklen_t addrlen, void *arg);
connect_r(sock_fd, (struct sockaddr *)&server_addr, sizeof(server_addr), (void *)argv[1]);
//ssize_t write_r(int fd, const void *ptr, size_t nbytes);
fprintf(stdout, "\n");
while(fgets(buf, MAXLINE, stdin) != NULL){
if(write_r(sock_fd, buf, strlen(buf)) == -1)
err_ret("write_r error");
//supplemention
//ssize_t read_r(int fd, void *ptr, size_t nbytes);
n = read(sock_fd, buf, MAXLINE);
if(n == 0)
fprintf(stdout, "peer side(%s port %d) has been closed.\n", argv[1], ntohs(server_addr.sin_port));
else {
fprintf(stdout, "responsed from server:\n");
write_r(STDOUT_FILENO, buf, n);
//fprintf(stdout, "\n");
}
}
//void close_r(int fd);
close_r(sock_fd);
return 0;
}
int
mark_close()
{
iptc_handle_t t;
int res;
if (!clean_on_exit) {
debug(DBG_NORMAL, "mark_close: cleaning is not my task.");
return 0;
}
load_dump_rules();
res = table_init(MANGLE_TABLE, &t);
if (res)
goto reset_error;
res = 0;
res += delete_rule(&rr, &t);
res += delete_rule(&fr, &t);
if (death_loop_rule) {
debug(DBG_INSANE,
"In mark_close: I'm an IGW: deleting death loop rule.");
res += delete_rule(&dr, &t);
}
if (res)
goto reset_error;
res = delete_ntk_forward_chain(&t);
if (res)
goto reset_error;
res = commit_rules(&t);
if (res)
goto reset_error;
debug(DBG_NORMAL, "Netfilter completely restored.");
return 0;
reset_error:
error(err_str);
loginfo("Netfilter was not restored. To clean, run:\n"
"\tiptables -t mangle -F\n"
"\tiptables -t mangle -X %s", NTK_MARK_CHAIN);
err_ret(ERR_NETRST, -1);
}
int main(int argc , char *argv[])
{
int i ;
struct stat buf ;
char *ptr ;
for(i = 1 ; i < argc ; ++i)
{
if(lstat(argv[i],&buf)<0)
{
err_ret("lstat error");
continue ;
}
if(S_ISREG(buf.st_mode))
ptr = "regular";
else if(S_ISDIR(buf.st_mode))
ptr = "directory";
else
ptr = "** unknown mode **";
printf("%s\n",ptr);
}
return 0;
}
int main (void)
{
char buf [MAXLINE];//定义数组存放标准输入的字符
pid_t pid ;//定义进程ID
int status ;
printf("%% ") ;
while (fgets (buf,MAXLINE,stdin) != NULL){ //标准IO函数从标入命令
if (buf[strlen(buf)-1] =='\n')
buf[strlen(buf)-1] = 0;//没搞明白
if ((pid = fork ()) < 0 ){ //创建子进程
err_sys ("fork error");
}else if (pid == 0 ){ //子进程返回值
execlp( buf, buf, (char *) 0) ;//子进程调用execle用来执行新的程序， ( char*) 0
err_ret ("couldnot execute :%s", buf);
exit (127) ;
}
if (( pid = waitpid (pid , &status,0)) < 0) //子进程调用execle执行新程序，父进程等待子进程终止
err_sys("waitpid error");
printf ("%% ");
}
exit (0);
}
int
main(int argc, char **argv)
{
char *ptr, **pptr;
char str[INET_ADDRSTRLEN];
struct hostent *hptr;
while ( --argc > 0) {
ptr = *++argv;
/* It is not re-entrant.
* Takes name, returns pointer to struct hostent,
* that contains addr_list of binary IPv4 addresses */
if ( ( hptr = gethostbyname(ptr)) == NULL) {
err_msg( "gethostbyname error for host: %s: %s",
ptr, hstrerror( h_errno));
continue;
}
/* FQDN */
printf( "official hostname: %s\n", hptr->h_name);
for ( pptr = hptr->h_aliases; *pptr != NULL; pptr++)
printf( "\talias: %s\n", *pptr);
switch ( hptr->h_addrtype) {
case AF_INET:
pptr = hptr->h_addr_list;
for ( ; *pptr != NULL; pptr++)
printf( "\taddress: %s\n",
Inet_ntop( hptr->h_addrtype, *pptr, str, sizeof(str)));
break;
default:
err_ret( "unknown address type");
break;
}
}
exit(0);
}
void pr_mask(const char *str){
sigset_t sigset;
int errno_save;
errno_save = errno;
if(sigprocmask(0,NULL,&sigset)<0){
err_ret("sigprocmask error");
}else{
printf("%s",str);
if(sigismember(&sigset,SIGINT))
printf(" SIGINT");
if(sigismember(&sigset,SIGQUIT))
printf(" SIGQUIT");
if(sigismember(&sigset,SIGUSR1))
printf(" SIGUSR1");
if(sigismember(&sigset,SIGALRM))
printf(" SIGALRM");
printf("\n");
}
errno = errno_save;
}
void
push2tree(char *py, char *id)
{
if (strlen(id) != 24) {
err_ret("bad id");
return;
}
py_tree *itree, *node;
int py_len = strlen(py);
for (int i = py_len - 1; i >= 0; i--) {
itree = tree;
for (int j = i; j < py_len; j++) {
int idx = get_idx(py[j]);
node = itree;
itree = itree->next[idx];
if (itree == NULL)
itree = node->next[idx] = make_node();
}
itree->ids = add2list(itree->ids, id);
}
}