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authorWilliam Roberts <bill.c.roberts@gmail.com>2014-02-11 10:12:00 -0800
committerEric Paris <eparis@redhat.com>2014-03-20 10:10:26 -0400
commit21a6457a79a02908dc8e60fe820828b2cc72d13a (patch)
treee67fb3af63c7aa5a1255e0c2aa770dc605773c93 /fs/proc
parenta90902531a06a030a252a07fbff7f45a189a64fe (diff)
downloadlinux-21a6457a79a02908dc8e60fe820828b2cc72d13a.tar.bz2
proc: Update get proc_pid_cmdline() to use mm.h helpers
Re-factor proc_pid_cmdline() to use get_cmdline() helper from mm.h. Acked-by: David Rientjes <rientjes@google.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: Richard Guy Briggs <rgb@redhat.com> Signed-off-by: William Roberts <wroberts@tresys.com> Acked-by: Richard Guy Briggs <rgb@redhat.com> Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/base.c36
1 files changed, 2 insertions, 34 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 03c8d747be48..cfd178dc76b2 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -200,41 +200,9 @@ static int proc_root_link(struct dentry *dentry, struct path *path)
return result;
}
-static int proc_pid_cmdline(struct task_struct *task, char * buffer)
+static int proc_pid_cmdline(struct task_struct *task, char *buffer)
{
- int res = 0;
- unsigned int len;
- struct mm_struct *mm = get_task_mm(task);
- if (!mm)
- goto out;
- if (!mm->arg_end)
- goto out_mm; /* Shh! No looking before we're done */
-
- len = mm->arg_end - mm->arg_start;
-
- if (len > PAGE_SIZE)
- len = PAGE_SIZE;
-
- res = access_process_vm(task, mm->arg_start, buffer, len, 0);
-
- // If the nul at the end of args has been overwritten, then
- // assume application is using setproctitle(3).
- if (res > 0 && buffer[res-1] != '\0' && len < PAGE_SIZE) {
- len = strnlen(buffer, res);
- if (len < res) {
- res = len;
- } else {
- len = mm->env_end - mm->env_start;
- if (len > PAGE_SIZE - res)
- len = PAGE_SIZE - res;
- res += access_process_vm(task, mm->env_start, buffer+res, len, 0);
- res = strnlen(buffer, res);
- }
- }
-out_mm:
- mmput(mm);
-out:
- return res;
+ return get_cmdline(task, buffer, PAGE_SIZE);
}
static int proc_pid_auxv(struct task_struct *task, char *buffer)