Difference between r1.1 and the current
@@ -2,21 +2,217 @@
#title 조각코드(Snippets)
#nocache
[wiki:Home 대문] / [wiki:CategorySnippets 조각코드(Snippets)]
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== [wiki:CategorySnippets 조각코드(Snippets)] ==
[[TableOfContents]]
=== C ===
=== Java ===
=== JavaScript ===
=== Python ===
=== Shell script ===
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== [wiki:CategorySnippets 조각코드(Snippets)] ==
여기 소개하는 작은 단위의 조각코드들은 간편하게 빠르게 사용하기 위한 함수만 정리한 것입니다. 가급적 하기 코드 사용하실 경우 출처를 주석으로 함께 표기하여 사용 부탁합니다.
=== Assembly === * Hexa dump 함수 - 주어진 data pointer로부터 size만큼 Hexa dump로 stdout으로 출력해줍니다.
{{{#!enscript c
static void __inline hwport_dump(char *s_title, void *s_data, int s_size)
{
int s_o,s_w,s_i;unsigned char s_b[17];
(void)fprintf(stdout, "%s:\n", s_title);
s_b[16]='\0';s_o=(int)0;
while(s_o<(s_size)){
s_w=((s_size)-s_o)<16?((s_size)-s_o):16;printf("%08X",s_o);for(s_i=0;s_i<s_w;s_i++){if(s_i==8)printf(" | ");else printf(" ");
s_b[s_i]=*(((unsigned char *)(s_data))+s_o+s_i);printf("%02X",s_b[s_i]);if((s_b[s_i]&0x80)||(s_b[s_i]<' '))s_b[s_i]='.';}
while(s_i<16){if(s_i==8)printf(" ");else printf(" ");s_b[s_i]=' ';s_i++;}
printf(" [%s]\n",(char *)s_b);s_o+=16;}
(void)fprintf(stdout, "\n");
}
}}}
* GLIBC(libc)의 버젼을 확인하는 코드 (Run-time)
{{{#!enscript c
#include <stdio.h>
#include <gnu/libc-version.h>
static void __inline hwport_print_glibc_version(void)
{
(void)fprintf(stdout, "glibc v%s (%s)\n", gnu_get_libc_version(), gnu_get_libc_release());
}
}}}
* Hotplug storage 장치(USB, CD-ROM등) 를 "장치제거" 하는 eject 예제
{{{#!enscript c
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <getopt.h>
#if 0L
#include <linux/cdrom.h>
#endif
static int __inline hwport_eject(const char *s_device, int s_mode)
{
int s_result, s_cmd, s_handle = open(s_device, O_RDONLY | O_NONBLOCK);
if(s_handle != (-1)) {
if(s_mode != 0) {
#if defined(CDROMEJECT)
s_cmd = CDROMEJECT;
#else
s_cmd = 0x5309;
#endif
}
else {
#if defined(CDROMCLOSETRAY)
s_cmd = CDROMCLOSETRAY;
#else
s_cmd = 0x5319;
#endif
}
if(ioctl(s_handle, s_cmd) == 0)s_result = 1;
else {
(void)fprintf(stdout, "error: can not control cdrom ! (device=\"%s\")\n", s_device);
s_result = 0;
}
(void)close(s_handle);
}
else {
(void)fprintf(stdout, "error: can not open cdrom ! (device=\"%s\")\n", s_device);
s_result = (-1);
}
return(s_result);
}
}}}
* 간단하게 E-Mail 을 전송하는 예제 - 별도의 데몬서비스등에 의존하지 않고 직접 구현하는 방법
{{{#!enscript c
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#if 0
char myhost[] = "infoeq.com";
char myemail[] = "minzkn@infoeq.com";
char rcptmail[] = "minzkn@infoeq.com";
char subject[] = "E-Mail hacking test by minzkn";
char body[] = "요것은 제가 한번 다른 사람을 인용하여 E-Mail을 보낼수 있는지 테스트 하는것입니다.";
#else
char myhost[] = "infoeq.com";
char myemail[] = "minzkn@infoeq.com";
char rcptmail[] = "minzkn@naver.com";
char subject[] = "E-Mail hacking test by minzkn";
char body[] = "요것은 제가 한번 다른 사람을 인용하여 E-Mail을 보낼수 있는지 테스트 하는것입니다.";
#endif
int main(int argc, char* argv[])
{
int c_sock;
char buffer[10000];
int len= 0, res;
struct sockaddr_in cli_addr;
struct hostent *s_host_entry;
/*----------- 소켓 구조체 초기화 ---------------------*/
c_sock = socket(PF_INET, SOCK_STREAM, 0);
memset(&cli_addr, 0, sizeof cli_addr);
cli_addr.sin_family = AF_INET;
cli_addr.sin_port = htons(25);
s_host_entry = gethostbyname((char *)myhost);
if(s_host_entry != ((struct hostent *)0))
{
cli_addr.sin_addr.s_addr = *((unsigned long *)(s_host_entry->h_addr));
}
else cli_addr.sin_addr.s_addr = inet_addr(myhost);
len = sizeof(cli_addr);
res = connect(c_sock, (struct sockaddr*)&cli_addr, len);
if(res<0)
{
perror("connect()");
exit(1);
}
(void)fprintf(stdout, "connected.\n");
/*------ (1) read and send my greeting. ---------------*/
len = recv(c_sock, buffer, sizeof(buffer), 0); /* 환영 메세지 읽음. */
buffer[len] = 0;
printf("%s", buffer);
sprintf(buffer, "HELO unknown.ppp\n");
send(c_sock, buffer, strlen(buffer), 0);
/*------ (2) read and send my email address -----------*/
len = recv(c_sock, buffer, sizeof(buffer), 0);
buffer[len] = 0;
printf("%s", buffer);
sprintf(buffer, "MAIL FROM: %s\n", myemail);
send(c_sock, buffer, strlen(buffer), 0);
/*------ (3) read and send recipient address ----------*/
len = recv(c_sock, buffer, sizeof(buffer), 0);
buffer[len] = 0;
printf("%s", buffer);
sprintf(buffer, "RCPT TO: %s\n", rcptmail);
send(c_sock, buffer, strlen(buffer), 0);
/*------ (4) read and send DATA Header. ------------*/
len = recv(c_sock, buffer, sizeof(buffer), 0);
buffer[len] = 0;
printf("%s", buffer);
sprintf(buffer, "DATA\n"); /* double */
send(c_sock, buffer, strlen(buffer), 0);
/*------ (5) read and send real body Header. ----------*/
len = recv(c_sock, buffer, sizeof(buffer), 0);
buffer[len] = 0;
printf("%s", buffer);
/*------ (6) read and send subject header. ------------*/
sprintf(buffer, "SUBJECT: %s\n\n", subject);
send(c_sock, buffer, strlen(buffer), 0 );
sprintf(buffer, "%s\n", body);
send(c_sock, buffer, strlen(buffer), 0 );
sprintf(buffer, ".\n");
send(c_sock, buffer, strlen(buffer), 0 );
sprintf(buffer, "QUIT\n");
send(c_sock, buffer, strlen(buffer), 0);
/*------ (7) read Bye message -------------------------*/
close(c_sock);
return(EXIT_SUCCESS);
}
}}}
* Flow control 제어문자에 의한 Process stop 방지 ("stty -ixon")
{{{#!enscript c
#include <termios.h>
/* 사용법
Flow control 끄려면 아래 링크릐 flow_control 함수소스를 긁어서 붙여 넣으시고 main 함수 선두에서 아래 3줄의 코드를 넣으시면 끝납니다.
hwport_flow_controlSTDIN_FILENO, 0, 0, 0);
hwport_flow_controlSTDOUT_FILENO, 0, 0, 0);
hwport_flow_controlSTDERR_FILENO, 0, 0, 0);
*/
static int __inline hwport_flow_control(int s_fd, int s_ixon, int s_ixoff, int s_ixany)
{
struct termios s_termios;
if(tcgetattr(s_fd, (struct termios *)(&s_termios)) == (-1)) {
return(-1);
}
if(s_ixon == 0) {
s_termios.c_iflag &= (tcflag_t)(~(IXON));
}
else if(s_ixon != (-1)) {
s_termios.c_iflag |= (tcflag_t)(IXON);
}
if(s_ixoff == 0) {
s_termios.c_iflag &= (tcflag_t)(~(IXOFF));
}
else if(s_ixoff != (-1)) {
s_termios.c_iflag |= (tcflag_t)(IXOFF);
}
#if defined(IXANY) /* This is not POSIX : IXANY */
if(s_ixany == 0) {
s_termios.c_iflag &= (tcflag_t)(~(IXANY));
}
else if(s_ixany != (-1)) {
s_termios.c_iflag |= (tcflag_t)(IXANY);
}
#endif
if(tcsetattr(s_fd, TCSANOW, (struct termios *)(&s_termios)) == (-1)) {
return(-1);
}
return(0);
}
}}}
=== Java ===
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