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From 6b62bbbc7b53bee11778d27d18e9506d9b42d4ba Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Sat, 11 Jul 2015 17:29:48 -0300
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Subject: [PATCH 044/261] logind: some firmware implementations remove
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OsIndications if it is unset
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We shouldn't fall over that, and just assume it is 0 in this case.
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Fixes #499.
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---
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src/shared/efivars.c | 14 +++++++++++++-
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1 file changed, 13 insertions(+), 1 deletion(-)
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diff --git a/src/shared/efivars.c b/src/shared/efivars.c
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index 0d6ecf5..347cd30 100644
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--- a/src/shared/efivars.c
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+++ b/src/shared/efivars.c
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@@ -125,7 +125,19 @@ static int get_os_indications(uint64_t *os_indication) {
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return r;
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r = efi_get_variable(EFI_VENDOR_GLOBAL, "OsIndications", NULL, &v, &s);
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- if (r < 0)
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+ if (r == -ENOENT) {
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+ /* Some firmware implementations that do support
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+ * OsIndications and report that with
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+ * OsIndicationsSupported will remove the
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+ * OsIndications variable when it is unset. Let's
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+ * pretend it's 0 then, to hide this implementation
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+ * detail. Note that this call will return -ENOENT
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+ * then only if the support for OsIndications is
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+ * missing entirely, as determined by
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+ * efi_reboot_to_firmware_supported() above. */
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+ *os_indication = 0;
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+ return 0;
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+ } else if (r < 0)
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return r;
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else if (s != sizeof(uint64_t))
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return -EINVAL;
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--
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2.4.3
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