proc: convert /proc/$PID/auxv to seq_file interface
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -205,22 +205,20 @@ static int proc_pid_cmdline(struct task_struct *task, char *buffer)
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return get_cmdline(task, buffer, PAGE_SIZE);
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}
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static int proc_pid_auxv(struct task_struct *task, char *buffer)
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static int proc_pid_auxv(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task)
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{
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struct mm_struct *mm = mm_access(task, PTRACE_MODE_READ);
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int res = PTR_ERR(mm);
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if (mm && !IS_ERR(mm)) {
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unsigned int nwords = 0;
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do {
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nwords += 2;
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} while (mm->saved_auxv[nwords - 2] != 0); /* AT_NULL */
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res = nwords * sizeof(mm->saved_auxv[0]);
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if (res > PAGE_SIZE)
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res = PAGE_SIZE;
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memcpy(buffer, mm->saved_auxv, res);
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seq_write(m, mm->saved_auxv, nwords * sizeof(mm->saved_auxv[0]));
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mmput(mm);
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}
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return res;
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return 0;
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} else
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return PTR_ERR(mm);
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}
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@ -2557,7 +2555,7 @@ static const struct pid_entry tgid_base_stuff[] = {
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DIR("net", S_IRUGO|S_IXUGO, proc_net_inode_operations, proc_net_operations),
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#endif
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REG("environ", S_IRUSR, proc_environ_operations),
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INF("auxv", S_IRUSR, proc_pid_auxv),
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ONE("auxv", S_IRUSR, proc_pid_auxv),
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ONE("status", S_IRUGO, proc_pid_status),
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ONE("personality", S_IRUSR, proc_pid_personality),
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INF("limits", S_IRUGO, proc_pid_limits),
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@ -2896,7 +2894,7 @@ static const struct pid_entry tid_base_stuff[] = {
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DIR("fdinfo", S_IRUSR|S_IXUSR, proc_fdinfo_inode_operations, proc_fdinfo_operations),
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DIR("ns", S_IRUSR|S_IXUGO, proc_ns_dir_inode_operations, proc_ns_dir_operations),
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REG("environ", S_IRUSR, proc_environ_operations),
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INF("auxv", S_IRUSR, proc_pid_auxv),
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ONE("auxv", S_IRUSR, proc_pid_auxv),
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ONE("status", S_IRUGO, proc_pid_status),
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ONE("personality", S_IRUSR, proc_pid_personality),
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INF("limits", S_IRUGO, proc_pid_limits),
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