Hello, 9fans In writing a program I met a problem on finding window size. cat /dev/wctl shows something like this: hebe% cat /dev/wctl 456 91 1214 603 current visible hebe% Need DEL key to stop. I want to get this info without manual intervention. I tried a experimental code: #include #include void main(void) { char buf[256]; int fd,n; fd = open("/dev/wctl",OREAD); print("%d\n",fd); //n = readn(fd,buf,1);//NG. buffer too small //n = readn(fd,buf,48);//NG. truncated //n = readn(fd,buf,56);//NG. truncated //n = readn(fd,buf,70);//NG. truncated n = readn(fd,buf,71);//OK, n=71 //n = readn(fd,buf,111);//OK. n=71 //n = readn(fd,buf,117);//OK. n=71 //n = readn(fd,buf,128);//NG. hungup /* I donn't know the reasnalbe value m for readn(fd,buf,m) */ if(n < 0){ print("%r\n"); } buf[n] = 0; print("n=%d\n%s\n",n,buf); close(fd); exits(nil); } I don't know whether m in readn(fd,buf,m) depends on something or not. If depends. then how to know getting OK value? Kenji Arisawa ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/Tf13f657beb7b12c0-M60ccbc9ae01219d2e2f46c4f Delivery options: https://9fans.topicbox.com/groups/9fans/subscription