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How can I change a number to a variable in C?

I would like to know how to substitute the value of a variable in C.

execl ("/bin/cat","cat","/proc/30828/status", (char *)0 );

I would like to be able to change "30828" to a variable because that value is not fixed. I am wondering if it is possible to do something like SHELL where you can do it. For example, in a shell, you can:

K=`ls -lis $i`
echo $K
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1 answer


Use snprintf()

to replace PID with a string variable:



char statusfile[30];
sprintf(statusfile, sizeof statusfile, "/proc/%d/status", pid);
execl("/bin/cat","cat",statusfile, (char *)0 );
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