Dedalus

Hi

My goal is to obtain something like that:

Pid: value_of pid
Name: process_name
State: process_state

where the left side is static and i get the right side dinamically.
I see on:
intializing an array of strings
this help but isn't exactly what i'm looking for.
I've tried but obviously is wrong.
Can anyone suggest the right way or a tutorial as well?

Thanks

D

itCbitC

provide more info as it's not possible (at least for me) to figure out what you're talking about

Dedalus

ok.

I've written a program that read the text file /proc/given_pid/stat that contain some stuff like:

stat:
1212 my_prog S ....

each entry in each position is a know parameter. I mean the first entry 1212 is the PID, the 2nd is the process name the 3d the state and so on.

the problem is that i can't understand how can i read the stat file and write on stdout something like:

PID: 1212
NAME: my_prog
STATE: S
.....

I was thinking to create something like: array [ PID, NAME, STATE ] [ 1212, my_prog, S ].
But still i don't know.

Thanks

matsp

So, do you want to REPLACE the current "PID", "NAME", "STATE" with the actual value from /proc/... ? Or do you want to store the values ALONGSIDE the names of the fields?

If it is the former you want, then I think your code is about right.

If it is the latter, you certainly aren't doing it right.

Of course, we don't see what values i has for example, so it may be that you've got it wrong for BOTH things.

--
Mats

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tabstop

I'm thinking you want to use strcat, I guess, on the assumption that MAX is large enough to hold whatever it is. I guess.

Although I don't know why you need to store PID NAME and STATE; can't you just put those as literals in your printf statements?

Dedalus

Sorry for my bad explain.
As tabstop suggest I'd like to do:

printf("%s\n", " PID:", array[0]);------>where array[0]= 1212
printf("%s\n","NAME", array[1]);------>where array[1] =my_prog
......

so should i use an array that contain strings?

matsp

You can not (without breaking lots of rules) store integers in a string as a long long [by the way, I think a PID will never be more than at most 32 bits, so I'm not sure why you feel you need to print it using %lld which is a 64-bit integer format - but that is beside the point].

So as tabstop says, you need to use an integer for pid, and strings for name and state.

Of course, if you do not need to use the PID for anything that requires it to be an integer (in other words, you simply want to report it back again), then there is little reason to actually convert the input to a integer - just use the string.

--
Mats

__________________
Compilers can produce warnings - make the compiler programmers happy: Use them!
Please don't PM me for help - and no, I don't do help over instant messengers.

itCbitC

ITA with tabstop because if it's just for display then you simply pick each of the values with fscanf() and printf() them later.
If you want to process these values apart from printing them, then you need to think of a 2D array for storing them too.

Dedalus

ok.

I'll try and I will report the result.

thanks for answ.
D.