linux - mknod() not creating named pipe -

i'm trying create fifo named pipe using mknod() command:

int main() { char* file="pipe.txt"; int state; state = mknod(file, s_ififo & 0777, 0); printf("%d",state); return 0; } 

but file not created in current directory. tried listing ls -l . state returns -1.

i found similar questions here , on other sites , i've tried solution suggested:

int main() { char* file="pipe.txt"; int state; unlink(file); state = mknod(file, s_ififo & 0777, 0); printf("%d",state); return 0; } 

this made no difference though , error remains. doing wrong here or there sort of system intervention causing problem?

help.. in advance

you using & set file type instead of |. docs:

the file type path or'ed mode argument, , application shall select 1 of following symbolic constants...

try this:

state = mknod(file, s_ififo | 0777, 0); 

because works:

#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h>   int main() {     char* file="pipe.txt";     int state;     unlink(file);     state = mknod(file, s_ififo | 0777, 0);     printf("state %d\n", state);     return 0; } 

compile it:

gcc -o fifo fifo.c 

run it:

$ strace -e trace=mknod ./fifo mknod("pipe.txt", s_ififo|0777)         = 0 state 0 +++ exited 0 +++ 

see result:

$ ls -l pipe.txt prwxrwxr-x. 1 lars lars 0 jul 16 12:54 pipe.txt