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Message-Id: <20200804224230.27774-1-ericonr@disroot.org>
Date: Tue, 4 Aug 2020 19:42:30 -0300
From: Érico Rolim <ericonr@...root.org>
To: musl@...ts.openwall.com
Cc: Érico Rolim <erico.erc@...il.com>
Subject: [PATCH v3] extend gethostid beyond a stub
From: Érico Rolim <erico.erc@...il.com>
Implement part of the glibc behavior, where the 32-bit identifier stored
in /etc/hostid, if the file exists, is returned. If this file doesn't
contain at least 32 bits or can't be opened for some reason, return 0.
---
Andre McCurdy, thanks for the review.
src/misc/gethostid.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/src/misc/gethostid.c b/src/misc/gethostid.c
index 25bb35db..ac84b82d 100644
--- a/src/misc/gethostid.c
+++ b/src/misc/gethostid.c
@@ -1,6 +1,19 @@
#include <unistd.h>
+#include <stdio.h>
+#include <stdint.h>
long gethostid()
{
- return 0;
+ FILE *f;
+ int32_t rv = 0;
+
+ f = fopen("/etc/hostid", "reb");
+ if (f) {
+ if (fread(&rv, 4, 1, f) == 0) {
+ rv = 0;
+ }
+ fclose(f);
+ }
+
+ return rv;
}
--
2.28.0
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