Setting OEM strings for a domain was introduced in
v4.1.0-rc1~315. However, any application that wanted to use them
(e.g. to point to an URL where a config file is stored) had to
'dmidecode -u --oem-string N' (where N is index of the string).
Well, we can expose them under our <sysinfo/> XML and if the
domain is running Libvirt inside it can be obtained using
virConnectGetSysinfo() API.
Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
---
src/util/virsysinfo.c | 102 +++++++++++++++++++++++++++-
tests/sysinfodata/x86sysinfo.data | 6 ++
tests/sysinfodata/x86sysinfo.expect | 8 +++
tests/sysinfotest.c | 27 ++++++--
4 files changed, 138 insertions(+), 5 deletions(-)
diff --git a/src/util/virsysinfo.c b/src/util/virsysinfo.c
index a26c27e83e..09e32df6a9 100644
--- a/src/util/virsysinfo.c
+++ b/src/util/virsysinfo.c
@@ -915,6 +915,103 @@ virSysinfoParseX86Chassis(const char *base,
}
+static int
+virSysinfoDMIDecodeOEMString(size_t i,
+ char **str)
+{
+ g_autofree char *err = NULL;
+ g_autoptr(virCommand) cmd = virCommandNewArgList(DMIDECODE, "--dump",
+ "--oem-string", NULL);
+ virCommandAddArgFormat(cmd, "%zu", i);
+ virCommandSetOutputBuffer(cmd, str);
+ virCommandSetErrorBuffer(cmd, &err);
+
+ if (virCommandRun(cmd, NULL) < 0)
+ return -1;
+
+ /* Unfortunately, dmidecode returns 0 even if OEM String index is out
+ * of bounds, but it prints an error message in that case. Check stderr
+ * and return success/failure accordingly. */
+
+ if (err && *err != '\0')
+ return -1;
+
+ return 0;
+}
+
+
+static int
+virSysinfoParseOEMStrings(const char *base,
+ virSysinfoOEMStringsDefPtr *stringsRet)
+{
+ virSysinfoOEMStringsDefPtr strings = NULL;
+ size_t i = 1;
+ int ret = -1;
+ const char *cur;
+
+ if (!(cur = strstr(base, "OEM Strings")))
+ return 0;
+
+ if (VIR_ALLOC(strings) < 0)
+ return -1;
+
+ while ((cur = strstr(cur, "String "))) {
+ char *eol;
+
+ cur += 7;
+
+ if (!(eol = strchr(cur, '\n'))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("Malformed output of dmidecode"));
+ goto cleanup;
+ }
+
+ while (g_ascii_isdigit(*cur))
+ cur++;
+
+ if (*cur != ':') {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("Malformed output of dmidecode"));
+ goto cleanup;
+ }
+
+ cur += 2;
+
+ virSkipSpacesBackwards(cur, &eol);
+ if (!eol)
+ continue;
+
+ if (VIR_EXPAND_N(strings->values, strings->nvalues, 1) < 0)
+ goto cleanup;
+
+ /* If OEM String contains newline, dmidecode escapes it as a dot.
+ * If this is the case then run dmidecode again to get raw string.
+ * Unfortunately, we can't dinstinguish betwen dot an new line at
+ * this level. */
+ if (memchr(cur, '.', eol - cur)) {
+ char *str;
+
+ if (virSysinfoDMIDecodeOEMString(i, &str) < 0)
+ goto cleanup;
+
+ strings->values[strings->nvalues - 1] = g_steal_pointer(&str);
+ } else {
+ strings->values[strings->nvalues - 1] = g_strndup(cur, eol - cur);
+ }
+
+ i++;
+ cur = eol;
+ }
+
+ *stringsRet = g_steal_pointer(&strings);
+ ret = 0;
+
+ cleanup:
+ virSysinfoOEMStringsDefFree(strings);
+ return ret;
+}
+
+
static int
virSysinfoParseX86Processor(const char *base, virSysinfoDefPtr ret)
{
@@ -1119,7 +1216,7 @@ virSysinfoReadDMI(void)
g_autofree char *outbuf = NULL;
g_autoptr(virCommand) cmd = NULL;
- cmd = virCommandNewArgList(DMIDECODE, "-q", "-t", "0,1,2,3,4,17", NULL);
+ cmd = virCommandNewArgList(DMIDECODE, "-q", "-t", "0,1,2,3,4,11,17", NULL);
virCommandSetOutputBuffer(cmd, &outbuf);
if (virCommandRun(cmd, NULL) < 0)
return NULL;
@@ -1141,6 +1238,9 @@ virSysinfoReadDMI(void)
if (virSysinfoParseX86Chassis(outbuf, &ret->chassis) < 0)
return NULL;
+ if (virSysinfoParseOEMStrings(outbuf, &ret->oemStrings) < 0)
+ return NULL;
+
ret->nprocessor = 0;
ret->processor = NULL;
if (virSysinfoParseX86Processor(outbuf, ret) < 0)
diff --git a/tests/sysinfodata/x86sysinfo.data b/tests/sysinfodata/x86sysinfo.data
index 426261041d..3f0b654e4b 100644
--- a/tests/sysinfodata/x86sysinfo.data
+++ b/tests/sysinfodata/x86sysinfo.data
@@ -81,3 +81,9 @@ Memory Device
Serial Number: 29057112
Asset Tag: 0839
Part Number: IMSH2GS13A1F1C-10F
+
+OEM Strings
+ String 1: Hello
+ String 2: World
+ String 3: Ha ha ha try parsing\n. String 3: this correctly. String 4:then
+ String 4: This is, more tricky value=escaped
diff --git a/tests/sysinfodata/x86sysinfo.expect b/tests/sysinfodata/x86sysinfo.expect
index fcdd790cbd..05add8f031 100644
--- a/tests/sysinfodata/x86sysinfo.expect
+++ b/tests/sysinfodata/x86sysinfo.expect
@@ -50,4 +50,12 @@
<entry name='serial_number'>29057112</entry>
<entry name='part_number'>IMSH2GS13A1F1C-10F</entry>
</memory_device>
+ <oemStrings>
+ <entry>Hello</entry>
+ <entry>World</entry>
+ <entry>Ha ha ha try parsing\n
+ String 3: this correctly
+ String 4:then</entry>
+ <entry>This is, more tricky value=escaped</entry>
+ </oemStrings>
</sysinfo>
diff --git a/tests/sysinfotest.c b/tests/sysinfotest.c
index 10d24b823a..3b418955d0 100644
--- a/tests/sysinfotest.c
+++ b/tests/sysinfotest.c
@@ -56,10 +56,29 @@ testDMIDecodeDryRun(const char *const*args G_GNUC_UNUSED,
{
const char *sysinfo = opaque;
- if (virFileReadAll(sysinfo, 10 * 1024 * 1024, output) < 0) {
- *error = g_strdup(virGetLastErrorMessage());
- *status = EXIT_FAILURE;
- return;
+ if (STREQ_NULLABLE(args[1], "--dump") &&
+ STREQ_NULLABLE(args[2], "--oem-string")) {
+ if (!args[3]) {
+ *error = g_strdup("dmidecode: option '--oem-string' requires an argument");
+ *status = EXIT_FAILURE;
+ return;
+ }
+
+ if (STREQ(args[3], "3")) {
+ *output = g_strdup("Ha ha ha try parsing\\n\n"
+ " String 3: this correctly\n"
+ " String 4:then");
+ } else {
+ *error = g_strdup_printf("No OEM string number %s", args[3]);
+ *status = EXIT_FAILURE;
+ return;
+ }
+ } else {
+ if (virFileReadAll(sysinfo, 10 * 1024 * 1024, output) < 0) {
+ *error = g_strdup(virGetLastErrorMessage());
+ *status = EXIT_FAILURE;
+ return;
+ }
}
*error = g_strdup("");
--
2.26.2
