55 lines
1.8 KiB
Diff
55 lines
1.8 KiB
Diff
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From 872ebeaa24ed1c4b0c1596a7ad37f2bf2275efb0 Mon Sep 17 00:00:00 2001
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From: Fabio Erculiani <lxnay@sabayon.org>
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Date: Tue, 3 Jan 2012 09:38:34 +0000
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Subject: [PATCH 35/36] linux-user: improve fake /proc/self/stat making `ps` not segfault.
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With the current fake /proc/self/stat implementation `ps` is
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segfaulting because it expects to read PID and argv[0] as first and
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second field respectively, with the latter being enclosed between
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backets.
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Reproducing is as easy as running: `ps` inside qemu-user chroot
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with /proc mounted.
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Signed-off-by: Fabio Erculiani <lxnay@sabayon.org>
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Acked-by: Alexander Graf <agraf@suse.de>
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Signed-off-by: Alexander Graf <agraf@suse.de>
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---
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linux-user/syscall.c | 19 +++++++++++++++----
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1 files changed, 15 insertions(+), 4 deletions(-)
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diff --git a/linux-user/syscall.c b/linux-user/syscall.c
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index 9ba51bf..3e8e3dd 100644
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--- a/linux-user/syscall.c
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+++ b/linux-user/syscall.c
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@@ -4678,11 +4678,22 @@ static int open_self_stat(void *cpu_env, int fd)
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int len;
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uint64_t val = 0;
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- if (i == 27) {
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- /* stack bottom */
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- val = start_stack;
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+ if (i == 0) {
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+ /* pid */
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+ val = getpid();
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+ snprintf(buf, sizeof(buf), "%"PRId64 " ", val);
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+ } else if (i == 1) {
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+ /* app name */
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+ snprintf(buf, sizeof(buf), "(%s) ", ts->bprm->argv[0]);
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+ } else if (i == 27) {
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+ /* stack bottom */
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+ val = start_stack;
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+ snprintf(buf, sizeof(buf), "%"PRId64 " ", val);
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+ } else {
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+ /* for the rest, there is MasterCard */
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+ snprintf(buf, sizeof(buf), "0%c", i == 43 ? '\n' : ' ');
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}
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- snprintf(buf, sizeof(buf), "%"PRId64 "%c", val, i == 43 ? '\n' : ' ');
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+
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len = strlen(buf);
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if (write(fd, buf, len) != len) {
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return -1;
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--
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1.6.0.2
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