Hi, I hope this is the right newsgroup for question, otherwise, excuse me.
Here's my problem: I want to use the unistd.h execl() with pipes, like:

execl("/usr/bin/cat","cat","fbrev.txt","|","/usr/lib/sendmail","-t",recepient,NULL);
And it returns endless junk-text...
Seems the problem is with the pipe |, does anyone know how to use pipes in
execl() ? Is there a way around ?

Thanks in advance, Martin Fredricsson

If you want to communicate on one end of a pipe with a process you
initiate, check out popen(3).

If all you really want to do is spawn a pipeline with which your
process will not interact, use the system(3) function instead.

result = system ("/usr/bin/cat fbrev.txt | /usr/lib/sendmail -t");

or

char cmdline[1024];
sprintf (cmdline, "/usr/bin/cat fbrev.txt | /usr/lib/sendmail %s",
recipient);

result = system (cmdline);

As a side remark: sendmail -t causes the reciver list to be deducted from
the mail message itself.

If you want ot use execl you need to create two processes, one for the cat
command and one for sendmail. Then you need to create a pipe between these
two processes.  The details of how to do that is better asked in a unix
group.  

Villy

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