48 lines
2.3 KiB
Diff
48 lines
2.3 KiB
Diff
From 896050eeb3acbf4106d71204a5173b4984cf1675 Mon Sep 17 00:00:00 2001
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From: Jan Synacek <jsynacek@redhat.com>
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Date: Fri, 31 Oct 2014 10:16:45 +0100
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Subject: [PATCH] core: improve error message when machine id is missing
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(cherry picked from commit 86fb9ca7ae49790880d4b3ce523988b01b13d9ae)
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---
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src/core/machine-id-setup.c | 17 ++++++++++++-----
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1 file changed, 12 insertions(+), 5 deletions(-)
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diff --git a/src/core/machine-id-setup.c b/src/core/machine-id-setup.c
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index efb074fcbd..ce6d8e02d0 100644
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--- a/src/core/machine-id-setup.c
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+++ b/src/core/machine-id-setup.c
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@@ -162,7 +162,7 @@ static int generate(char id[34], const char *root) {
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int machine_id_setup(const char *root) {
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const char *etc_machine_id, *run_machine_id;
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_cleanup_close_ int fd = -1;
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- bool writable = false;
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+ bool writable = true;
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struct stat st;
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char id[34]; /* 32 + \n + \0 */
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int r;
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@@ -186,12 +186,19 @@ int machine_id_setup(const char *root) {
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mkdir_parents(etc_machine_id, 0755);
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fd = open(etc_machine_id, O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY, 0444);
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- if (fd >= 0)
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- writable = true;
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- else {
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+ if (fd < 0) {
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+ int old_errno = errno;
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+
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fd = open(etc_machine_id, O_RDONLY|O_CLOEXEC|O_NOCTTY);
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if (fd < 0) {
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- log_error("Cannot open %s: %m", etc_machine_id);
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+ if (old_errno == EROFS && errno == ENOENT)
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+ log_error("System cannot boot: Missing /etc/machine-id and /etc is mounted read-only.\n"
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+ "Booting up is supported only when:\n"
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+ "1) /etc/machine-id exists and is populated.\n"
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+ "2) /etc/machine-id exists and is empty.\n"
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+ "3) /etc/machine-id is missing and /etc is writable.\n");
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+ else
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+ log_error("Cannot open %s: %m", etc_machine_id);
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return -errno;
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}
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