Daniel P. Berrange wrote: ...
That patch looks fine, and is nicely minimal. However, it does relax the test significantly. Rather than requiring that QEMU_VERSION_STR be a prefix, it would allow it to appear anywhere within the -help output. ... ACK, prefer the stricter check. One day QEMU might even provide this in a reliably parsable format like JSON...
FYI, here's the complete patch I'll push in an hour or so. Note that I reordered, so that we check the new string before the "old" one.
From 3b7179866bd9e495332335df74b327cc156a298c Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering@redhat.com> Date: Thu, 20 May 2010 15:43:47 +0200 Subject: [PATCH] qemu_conf.c: also recognize new first line of qemu -help output
* src/qemu/qemu_conf.c (QEMU_VERSION_STR_1, QEMU_VERSION_STR_2): Define these instead of... (QEMU_VERSION_STR): ... this. Remove definition. (qemudParseHelpStr): Check first for the new, shorter prefix, "QEMU emulator version", and then for the old one, "QEMU PC emulator version" when trying to parse the version number. Based on a patch by Chris Wright. --- src/qemu/qemu_conf.c | 15 ++++++++++----- 1 files changed, 10 insertions(+), 5 deletions(-) diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 5c14eb8..e1be340 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -1246,7 +1246,9 @@ static unsigned long long qemudComputeCmdFlags(const char *help, /* We parse the output of 'qemu -help' to get the QEMU * version number. The first bit is easy, just parse - * 'QEMU PC emulator version x.y.z'. + * 'QEMU PC emulator version x.y.z' + * or + * 'QEMU emulator version x.y.z'. * * With qemu-kvm, however, that is followed by a string * in parenthesis as follows: @@ -1259,7 +1261,8 @@ static unsigned long long qemudComputeCmdFlags(const char *help, * and later, we just need the QEMU version number and * whether it is KVM QEMU or mainline QEMU. */ -#define QEMU_VERSION_STR "QEMU PC emulator version" +#define QEMU_VERSION_STR_1 "QEMU emulator version" +#define QEMU_VERSION_STR_2 "QEMU PC emulator version" #define QEMU_KVM_VER_PREFIX "(qemu-kvm-" #define KVM_VER_PREFIX "(kvm-" @@ -1277,11 +1280,13 @@ int qemudParseHelpStr(const char *qemu, *flags = *version = *is_kvm = *kvm_version = 0; - if (!STRPREFIX(p, QEMU_VERSION_STR)) + if (STRPREFIX(p, QEMU_VERSION_STR_1)) + p += strlen(QEMU_VERSION_STR_1); + else if (STRPREFIX(p, QEMU_VERSION_STR_2)) + p += strlen(QEMU_VERSION_STR_2); + else goto fail; - p += strlen(QEMU_VERSION_STR); - SKIP_BLANKS(p); major = virParseNumber(&p); -- 1.7.1.262.g5ef3d