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authorCyrill Gorcunov <gorcunov@openvz.org>2012-05-31 16:26:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-31 17:49:32 -0700
commit5b172087f99189416d5f47fd7ab5e6fb762a9ba3 (patch)
tree2619444e8ceee40df80814a1004687ac3d7f1eda /fs/proc/array.c
parentd97b46a64674a267bc41c9e16132ee2a98c3347d (diff)
downloadop-kernel-dev-5b172087f99189416d5f47fd7ab5e6fb762a9ba3.zip
op-kernel-dev-5b172087f99189416d5f47fd7ab5e6fb762a9ba3.tar.gz
c/r: procfs: add arg_start/end, env_start/end and exit_code members to /proc/$pid/stat
We would like to have an ability to restore command line arguments and program environment pointers but first we need to obtain them somehow. Thus we put these values into /proc/$pid/stat. The exit_code is needed to restore zombie tasks. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Acked-by: Kees Cook <keescook@chromium.org> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Serge Hallyn <serge.hallyn@canonical.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Tejun Heo <tj@kernel.org> Cc: Andrew Vagin <avagin@openvz.org> Cc: Vasiliy Kulikov <segoon@openwall.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/array.c')
-rw-r--r--fs/proc/array.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 62887e3..c1c207c 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -517,9 +517,23 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task));
seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime));
seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime));
- seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->start_data : 0);
- seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->end_data : 0);
- seq_put_decimal_ull(m, ' ', (mm && permitted) ? mm->start_brk : 0);
+
+ if (mm && permitted) {
+ seq_put_decimal_ull(m, ' ', mm->start_data);
+ seq_put_decimal_ull(m, ' ', mm->end_data);
+ seq_put_decimal_ull(m, ' ', mm->start_brk);
+ seq_put_decimal_ull(m, ' ', mm->arg_start);
+ seq_put_decimal_ull(m, ' ', mm->arg_end);
+ seq_put_decimal_ull(m, ' ', mm->env_start);
+ seq_put_decimal_ull(m, ' ', mm->env_end);
+ } else
+ seq_printf(m, " 0 0 0 0 0 0 0");
+
+ if (permitted)
+ seq_put_decimal_ll(m, ' ', task->exit_code);
+ else
+ seq_put_decimal_ll(m, ' ', 0);
+
seq_putc(m, '\n');
if (mm)
mmput(mm);
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