hello,
I have a question about process states:
I have this simplified code which I run under gdb.
#include <stdio.h>
int main()
{
int i;
for(i=0; i < 10; i++)
printf("Hello, world!\n");
pause();
return 0;
}
I build on x86_64 (fedora 17) with gcc -g hello.c -o hello.
And then:
gdb --quiet hello
Reading symbols from /work/dev/t/sec/hello...done.
(gdb) break main
Breakpoint 1 at 0x400534: file hello.c, line 7.
(gdb) run
Starting program: /work/dev/t/sec/hello
Breakpoint 1, main () at hello.c:7
7 for(i=0; i < 10; i++)
Missing separate debuginfos, use: debuginfo-install glibc-2.15-58.fc17.x86_64
(gdb)
Now with "ps aux | grep hello" I see two processes:
root 10310 0.0 0.7 196432 15188 pts/1 S+ 14:42 0:00 gdb
--quiet hello
root 10333 0.0 0.0 4108 344 pts/1 t 14:44 0:00
/work/dev/t/sec/hello
S is for Interruptible sleep
I assume that the "t" is for process state of "TRACED". Am I right?
Strangely, in the man page there is no lowercase "t" for traced (or
anything else), only "T".
Could it be that this is an error in the man page ?? (strange, it
should have been noticed before)
from "man ps":
...
PROCESS STATE CODES
Here are the different values that the s, stat and state output
specifiers (header "STAT" or "S") will display to describe the state of
a process:
D uninterruptible sleep (usually IO)
R running or runnable (on run queue)
S interruptible sleep (waiting for an event to complete)
T stopped, either by a job control signal or because it is being
traced.
W paging (not valid since the 2.6.xx kernel)
X dead (should never be seen)
Z defunct ("zombie") process, terminated but not reaped by its
parent.
For BSD formats and when the stat keyword is used, additional
characters may be displayed:
< high-priority (not nice to other users)
N low-priority (nice to other users)
L has pages locked into memory (for real-time and custom IO)
s is a session leader
The man pages are man-pages-3.35-4.fc17.noarc
...
DS
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