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GET /api/patches/2195645/?format=api
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{
    "id": 2195645,
    "url": "http://patchwork.ozlabs.org/api/patches/2195645/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260211152508.732487-26-berrange@redhat.com/",
    "project": {
        "id": 14,
        "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api",
        "name": "QEMU Development",
        "link_name": "qemu-devel",
        "list_id": "qemu-devel.nongnu.org",
        "list_email": "qemu-devel@nongnu.org",
        "web_url": "",
        "scm_url": "",
        "webscm_url": "",
        "list_archive_url": "",
        "list_archive_url_format": "",
        "commit_url_format": ""
    },
    "msgid": "<20260211152508.732487-26-berrange@redhat.com>",
    "list_archive_url": null,
    "date": "2026-02-11T15:25:06",
    "name": "[v6,25/27] util: add support for formatting a program name in messages",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "611050b98026a7a65ba458643ba35752afb66fa9",
    "submitter": {
        "id": 2694,
        "url": "http://patchwork.ozlabs.org/api/people/2694/?format=api",
        "name": "Daniel P. Berrangé",
        "email": "berrange@redhat.com"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260211152508.732487-26-berrange@redhat.com/mbox/",
    "series": [
        {
            "id": 491862,
            "url": "http://patchwork.ozlabs.org/api/series/491862/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=491862",
            "date": "2026-02-11T15:24:41",
            "name": "util: sync error_report & qemu_log output more closely",
            "version": 6,
            "mbox": "http://patchwork.ozlabs.org/series/491862/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2195645/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2195645/checks/",
    "tags": {},
    "related": [],
    "headers": {
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        "From": "=?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= <berrange@redhat.com>",
        "To": "qemu-devel@nongnu.org",
        "Cc": "Manos Pitsidianakis <manos.pitsidianakis@linaro.org>,\n Stefan Weil <sw@weilnetz.de>, \"Dr. David Alan Gilbert\" <dave@treblig.org>,\n Pierrick Bouvier <pierrick.bouvier@linaro.org>, devel@lists.libvirt.org,\n\t=?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= <philmd@linaro.org>, =?utf-8?q?Marc?=\n\t=?utf-8?q?-Andr=C3=A9_Lureau?= <marcandre.lureau@redhat.com>,\n Hanna Reitz <hreitz@redhat.com>, Kevin Wolf <kwolf@redhat.com>,\n qemu-block@nongnu.org, qemu-rust@nongnu.org,\n Paolo Bonzini <pbonzini@redhat.com>, Markus Armbruster <armbru@redhat.com>,\n Gerd Hoffmann <kraxel@redhat.com>,\n =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= <berrange@redhat.com>,\n Christian Schoenebeck <qemu_oss@crudebyte.com>,\n Richard Henderson <richard.henderson@linaro.org>",
        "Subject": "[PATCH v6 25/27] util: add support for formatting a program name in\n messages",
        "Date": "Wed, 11 Feb 2026 15:25:06 +0000",
        "Message-ID": "<20260211152508.732487-26-berrange@redhat.com>",
        "In-Reply-To": "<20260211152508.732487-1-berrange@redhat.com>",
        "References": "<20260211152508.732487-1-berrange@redhat.com>",
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    },
    "content": "The error_report function can include the program name in any\nmessages it prints. The qemu_log function has no equivalent\nbehaviour.\n\nThis introduces support for a \"program name\" in the new\nmessages API, which will be included by default for all\nbinaries.\n\nThis change tweaks the output of the error_report function,\nadding a space between the program name and the location\ninfo. The qemu_log function will gain the program name. This\ncan be easily seen with the 'log' trace backend, and how it\nis now more closely matching error_report output.\n\nBefore:\n\n  # qemu-system-x86_64 -object tls-creds-x509,id=t0,dir=fish -d 'trace:qcrypto*'\n  qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x5584e13937f0 dir=fish\n  qcrypto_tls_creds_get_path TLS creds path creds=0x5584e13937f0 filename=ca-cert.pem path=<none>\n  qemu-system-x86_64: Unable to access credentials fish/ca-cert.pem: No such file or directory\n\nAfter:\n\n  # qemu-system-x86_64 -object tls-creds-x509,id=t0,dir=fish -d 'trace:qcrypto*'\n  qemu-system-x86_64: qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x5584e13937f0 dir=fish\n  qemu-system-x86_64: qcrypto_tls_creds_get_path TLS creds path creds=0x5584e13937f0 filename=ca-cert.pem path=<none>\n  qemu-system-x86_64: Unable to access credentials fish/ca-cert.pem: No such file or directory\n\nWhen adding this the '-msg program-name=on|off' option is\nintroduced, so that the program name (which is enabled by\ndefault) can be supressed if desired. This could be useful\nif '-msg guest-name=on' is being used as a more informative\nidentifier.\n\nReviewed-by: Richard Henderson <richard.henderson@linaro.org>\nSigned-off-by: Daniel P. Berrangé <berrange@redhat.com>\n---\n include/qemu/message.h         |  1 +\n qemu-options.hx                |  9 +++++++--\n system/vl.c                    | 11 ++++++++++-\n tests/unit/test-error-report.c |  5 +++--\n util/error-report.c            |  4 ----\n util/message.c                 | 10 +++++++++-\n 6 files changed, 30 insertions(+), 10 deletions(-)",
    "diff": "diff --git a/include/qemu/message.h b/include/qemu/message.h\nindex cfc3c92648..b8518d06be 100644\n--- a/include/qemu/message.h\n+++ b/include/qemu/message.h\n@@ -6,6 +6,7 @@\n enum QMessageFormatFlags {\n     QMESSAGE_FORMAT_TIMESTAMP = (1 << 0),\n     QMESSAGE_FORMAT_WORKLOAD_NAME = (1 << 1),\n+    QMESSAGE_FORMAT_PROGRAM_NAME = (1 << 2),\n };\n \n /**\ndiff --git a/qemu-options.hx b/qemu-options.hx\nindex cdb7fa20c2..84dcbb0983 100644\n--- a/qemu-options.hx\n+++ b/qemu-options.hx\n@@ -5515,13 +5515,15 @@ ERST\n \n DEF(\"msg\", HAS_ARG, QEMU_OPTION_msg,\n     \"-msg [timestamp=on|off][,guest-name=on|off]\\n\"\n+    \"     [,program-name=on|off]\\n\"\n     \"                control error message format\\n\"\n     \"                timestamp=on enables timestamps (default: off)\\n\"\n     \"                guest-name=on enables guest name prefix but only if\\n\"\n-    \"                              -name guest option is set (default: off)\\n\",\n+    \"                              -name guest option is set (default: off)\\n\"\n+    \"                program-name=off disables program name prefix (default: on)\\n\",\n     QEMU_ARCH_ALL)\n SRST\n-``-msg [timestamp=on|off][,guest-name=on|off]``\n+``-msg [timestamp=on|off][,guest-name=on|off][,program-name=on|off]``\n     Control error message format.\n \n     ``timestamp=on|off``\n@@ -5530,6 +5532,9 @@ SRST\n     ``guest-name=on|off``\n         Prefix messages with guest name but only if -name guest option is set\n         otherwise the option is ignored. Default is off.\n+\n+    ``program-name=on|off``\n+        Prefix messages with the program name. Default is on.\n ERST\n \n DEF(\"dump-vmstate\", HAS_ARG, QEMU_OPTION_dump_vmstate,\ndiff --git a/system/vl.c b/system/vl.c\nindex be5862e55e..3e79bf47e0 100644\n--- a/system/vl.c\n+++ b/system/vl.c\n@@ -381,6 +381,12 @@ static QemuOptsList qemu_msg_opts = {\n             .help = \"Prepends guest name for error messages but only if \"\n                     \"-name guest is set otherwise option is ignored\\n\",\n         },\n+        {\n+            .name = \"program-name\",\n+            .type = QEMU_OPT_BOOL,\n+            .help = \"Prepends program name for error messages (enabled \"\n+                    \"by default)\\n\",\n+        },\n         { /* end of list */ }\n     },\n };\n@@ -819,13 +825,16 @@ static void realtime_init(void)\n \n static void configure_msg(QemuOpts *opts)\n {\n-    int flags = 0;\n+    int flags = QMESSAGE_FORMAT_PROGRAM_NAME;\n     if (qemu_opt_get_bool(opts, \"timestamp\", false)) {\n         flags |= QMESSAGE_FORMAT_TIMESTAMP;\n     }\n     if (qemu_opt_get_bool(opts, \"guest-name\", false)) {\n         flags |= QMESSAGE_FORMAT_WORKLOAD_NAME;\n     }\n+    if (!qemu_opt_get_bool(opts, \"program-name\", true)) {\n+        flags &= ~QMESSAGE_FORMAT_PROGRAM_NAME;\n+    }\n     qmessage_set_format(flags);\n }\n \ndiff --git a/tests/unit/test-error-report.c b/tests/unit/test-error-report.c\nindex 9c63019694..714eafc51e 100644\n--- a/tests/unit/test-error-report.c\n+++ b/tests/unit/test-error-report.c\n@@ -47,7 +47,7 @@ test_error_report_loc(void)\n     g_test_trap_subprocess(NULL, 0, 0);\n     g_test_trap_assert_passed();\n     g_test_trap_assert_stderr(\"\\\n-test-error-report:some-file.c:7717: test error1*\\\n+test-error-report: some-file.c:7717: test error1*\\\n test-error-report: test error2*\\\n \");\n }\n@@ -90,7 +90,8 @@ static void\n test_error_report_timestamp(void)\n {\n     if (g_test_subprocess()) {\n-        qmessage_set_format(QMESSAGE_FORMAT_TIMESTAMP);\n+        qmessage_set_format(QMESSAGE_FORMAT_TIMESTAMP |\n+                            QMESSAGE_FORMAT_PROGRAM_NAME);\n         warn_report(\"warn\");\n         error_report(\"err\");\n         return;\ndiff --git a/util/error-report.c b/util/error-report.c\nindex 3009b93c23..196d51618c 100644\n--- a/util/error-report.c\n+++ b/util/error-report.c\n@@ -179,10 +179,6 @@ static void print_loc(Monitor *cur)\n     int i;\n     const char *const *argp;\n \n-    if (!cur && g_get_prgname()) {\n-        fprintf(stderr, \"%s:\", g_get_prgname());\n-        sep = \" \";\n-    }\n     switch (cur_loc->kind) {\n     case LOC_CMDLINE:\n         argp = cur_loc->ptr;\ndiff --git a/util/message.c b/util/message.c\nindex fb2c947153..dd01bf7462 100644\n--- a/util/message.c\n+++ b/util/message.c\n@@ -5,7 +5,7 @@\n #include \"qemu/message.h\"\n #include \"monitor/monitor.h\"\n \n-static int message_format;\n+static int message_format = QMESSAGE_FORMAT_PROGRAM_NAME;\n static char *message_workloadname;\n \n void qmessage_set_format(int flags)\n@@ -32,4 +32,12 @@ void qmessage_context_print(FILE *fp)\n         fputs(message_workloadname, fp);\n         fputc(' ', fp);\n     }\n+\n+    if (message_format & QMESSAGE_FORMAT_PROGRAM_NAME) {\n+        const char *pgnamestr = g_get_prgname();\n+        if (pgnamestr) {\n+            fputs(pgnamestr, fp);\n+            fputs(\": \", fp);\n+        }\n+    }\n }\n",
    "prefixes": [
        "v6",
        "25/27"
    ]
}