#include <unistd.h>
#include <sys/types.h>
int main(void){
pid_t child,parent;
char *term;
child = getpid();
parent = getppid();
term = ctermid((char*)child);
printf("Child: %d\n",child);
printf("Parent: %d\n",parent);
printf("Terminal: %s\n",term);
return 0;
} Getting the run time of a process
March 15, 2002 08:34 AM
Hi guys I''m just starting to play around with processes, below is some extremely basic code of what i''ve done so far.
I was just wondering how would you get the run time of a process, as I am trying to figure out how "ps" does its stuff.
March 16, 2002 05:02 AM
Please elaborate, there is quite a bit of stuff in the proc directory, what should I be looking for?
122
March 21, 2002 02:29 AM
M''kay, first
ls -al /proc and look at the list of all directories in /proc that contain numerical names. Each directory with a numerical name is the number of the process. Now say for example you are interested in the process specified by /proc/12345, type ls -al /proc/12345 and you should see a bunch of interesting objects (files, subdirs, links, etc). Each object contains information about that process which the ps command obtains its information from. Now all you need to do is open the file and read the information. You can manually do that by using the command more, ie more /proc/12345/mem for example.
Tara Milana - WP Entertainmenthttp://wolfpack.twu.net/Comp graphics artist and programmer.
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