wts wrong in namepipe program

This is a discussion on wts wrong in namepipe program within the Linux Programming forums, part of the Platform Specific Boards category; i didt getting output in this nameppipe program. please anyone let me know error Code: #include<stdio.h> #include <sys/types.h> #include <sys/stat.h> ...

  1. #1
    kotin
    Join Date
    Oct 2009
    Posts
    132

    wts wrong in namepipe program

    i didt getting output in this nameppipe program. please anyone let me know error

    Code:
    #include<stdio.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <fcntl.h>
    #include <unistd.h>
    int main()
    {
    int i,j;
    char s[]="namedpipe",b[20];
    i=mkfifo("namedpipe",0666);
    j=open("namedpipe",O_RDWR);
    write(j,s,4);
    read(j,b,4);
    printf("%s\n",b);
    return 0;
    }

  2. #2
    Captain Crash brewbuck's Avatar
    Join Date
    Mar 2007
    Location
    Portland, OR
    Posts
    7,159
    Opening a pipe in "read-write" mode is not reliable (nor defined by POSIX, if I remember). You need to actually open the pipe twice, once in O_RDONLY mode and once in O_WRONLY mode.

    Also, your printf() string is not properly null-terminated.
    Code:
    //try
    //{
    	if (a) do { f( b); } while(1);
    	else   do { f(!b); } while(1);
    //}

  3. #3
    kotin
    Join Date
    Oct 2009
    Posts
    132
    Thanks for your suggestions

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