Messages in this thread | | | Date | Wed, 21 Mar 2001 13:53:40 +0100 | From | Joern Heissler <> | Subject | strange problem with /dev/isdninfo |
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Hello! I'm new to the Mailinglist.
I've got a strange problem with /dev/isdninfo:
joern:~# cat /dev/isdninfo idmap: Hisax... chmap: 0 1 ... foo bar phone: ??? ??? ...
--> cat /dev/isdninfo works :-)
Here's the problem:
joern:~# cat <<EOF >cat2.c #include <unistd.h> #include <fcntl.h>
int main(int argc, char **argv) { char buf[500]; int fd;
if(argc!=2) { return(1); } fd=open(argv[1],O_RDONLY); write(1,buf,read(fd,buf,200)); return(0); } EOF joern:~# gcc -o cat2 -Wall -ansi cat2.c joern:~# ./cat2 /dev/urandom ---> 200 bytes of random characters. works :-) joern:~# ./cat2 /dev/isdninfo ---> nothing.
joern:~# strace ./cat2 /dev/isdninfo ... open("/dev/isdninfo", O_RDONLY) = 3 read(3, "", 200) = 0 write(1, "", 0) = 0 _exit(0) = ?
Could someone please tell me what's wrong? I (and some other people) do not understand this. Thanks in advance!
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