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select(2)¸¦ ÀÌ¿ëÇÑ ½Ã°£Á¦ÇÑ ±â´ÉÀ» °¡Áø Ç¥ÁØÀÔ·ÂÀ» ¹Þ¾ÆµéÀÌ´Â ÇÔ¼ö ÀÔ´Ï´Ù. ÇÊ¿äÇÒ ¶§ ¸¶´Ù select(2)¸Þ´º¾óÀ» µÚÀûÀÌ¸é¼ ´Ù½Ã ¸¸µé¾î¾ß µÇ´Â°Ô ±ÍÂú¾Æ¼ °£´ÜÇÏ°Ô ÇÔ¼öÈ ½ÃÄ×½À´Ï´Ù. »ç¿ë¹æ¹ýint read_wait(char *buf, size_t size, int sec)
int main() { char buf[80] = {0x00,}; int n; if ((n = read_wait(buf, 80, 5)) < 0) printf("Time out\n"); } else { printf("%s\n", buf); } } ÄÚµå#include <sys/select.h> #include <sys/types.h> #include <unistd.h> int read_wait(char *buf, size_t size, int sec) { fd_set rfds; struct timeval tv; int n, retval; FD_ZERO(&rfds); FD_SET(0, &rfds); tv.tv_sec = sec; tv.tv_usec = 0; retval = select (1, &rfds, NULL, NULL, &tv); if (retval) { n = read(0, buf, size); return n; } else { return -1; } } |
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