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From d98adab06485b0da23294f8a5db4f94b40988e2a Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Fri, 2 Dec 2022 23:52:12 +0100
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Subject: [PATCH] systemctl: print a clear warning if people invoke systemctl
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without /proc/
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(cherry picked from commit 0f958c8d4fc13ed1c1af928b2a7d91d31c7576eb)
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Related: #2138081
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---
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src/systemctl/systemctl.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
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index 5858c3f6d3..91954d91e6 100644
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--- a/src/systemctl/systemctl.c
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+++ b/src/systemctl/systemctl.c
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@@ -20,6 +20,7 @@
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#include "rlimit-util.h"
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#include "sigbus.h"
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#include "signal-util.h"
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+#include "stat-util.h"
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#include "string-table.h"
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#include "systemctl-add-dependency.h"
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#include "systemctl-cancel-job.h"
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@@ -1146,6 +1147,13 @@ static int run(int argc, char *argv[]) {
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if (r <= 0)
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goto finish;
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+ if (proc_mounted() == 0)
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+ log_warning("%s%s/proc/ is not mounted. This is not a supported mode of operation. Please fix\n"
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+ "your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway.\n"
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+ "Your mileage may vary.",
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+ emoji_enabled() ? special_glyph(SPECIAL_GLYPH_WARNING_SIGN) : "",
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+ emoji_enabled() ? " " : "");
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+
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if (arg_action != ACTION_SYSTEMCTL && running_in_chroot() > 0) {
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if (!arg_quiet)
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log_info("Running in chroot, ignoring request.");
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