Kristof Provost a écrit :
On 2010-06-03 12:29:29 (+0300), Mihamina Rakotomandimby <mihamina@xxxxxxxxxx> wrote:
Joel Fernandes <agnel.joel@xxxxxxxxx> :
If I launch a
$ watch find / -type f -name 'toto'
(it's a useless command just for the example)
and then I get the PID of this.
PID of what? watch or find?
PID of "watch"
When I
$ cat /proc/${PID}/cmdline
watchfind/-typef-nametoto
Yes, it's the command line, but I would like to parse it, in order to
display the launched executable + its arguments.
How to parse it?
Could you be a bit more clear with your question?
I want to split "watchfind/-typef-nametoto" (the content
of /proc/${PID}/cmdline) to get "watch find / -type f -name toto" (the
command I issued above)
But I cannot figure out how to split it.
Would you know another place in the system I should look at?
Running 'hexdump -C /proc/2202/cmdline' produces this:
00000000 2f 73 62 69 6e 2f 67 65 74 74 79 00 33 38 34 30 |/sbin/getty.3840|
00000010 30 00 74 74 79 31 00 |0.tty1.|
00000017
It looks like the fields are separated by 0 bytes.
You'll simply need to read the file and split on every zero byte.
Kristof
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You're right.
I'm no awk expert, so the following command might not be as beautiful as
can be, but it does exactly what Mihamina wants :
$ cat /proc/PID/cmdline | awk '{BEGIN {FS = "\0"} ; {ORS = " "}; {for (i
= 1 i < NF; i++) print $i}'
Cyril.
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