[PATCH v4 5/8] log: Add _perror() logging function variants

public inbox for passt-dev@passt.top
 help / color / mirror / code / Atom feed

From: Stefano Brivio <sbrivio@redhat.com>
To: passt-dev@passt.top
Cc: Yalan Zhang <yalzhang@redhat.com>,
	David Gibson <david@gibson.dropbear.id.au>
Subject: [PATCH v4 5/8] log: Add _perror() logging function variants
Date: Thu, 20 Jun 2024 06:07:57 +0200	[thread overview]
Message-ID: <20240620040800.3065684-6-sbrivio@redhat.com> (raw)
In-Reply-To: <20240620040800.3065684-1-sbrivio@redhat.com>

In many places, we have direct perror() calls, which completely bypass
logging functions and log files.

They are definitely convenient: offer similar convenience with
_perror() logging variants, so that we can drop those direct perror()
calls.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
 log.c | 22 ++++++++++++++++++++++
 log.h | 21 +++++++++++++++++----
 2 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/log.c b/log.c
index 025129a..a352b06 100644
--- a/log.c
+++ b/log.c
@@ -78,6 +78,11 @@ void vlogmsg(int pri, const char *format, va_list ap)
 	}
 }
 
+/**
+ * logmsg() - vlogmsg() wrapper for variable argument lists
+ * @pri:	Facility and level map, same as priority for vsyslog()
+ * @format:	Message
+ */
 void logmsg(int pri, const char *format, ...)
 {
 	va_list ap;
@@ -87,6 +92,23 @@ void logmsg(int pri, const char *format, ...)
 	va_end(ap);
 }
 
+/**
+ * logmsg_perror() - vlogmsg() wrapper with perror()-like functionality
+ * @pri:	Facility and level map, same as priority for vsyslog()
+ * @format:	Message
+ */
+void logmsg_perror(int pri, const char *format, ...)
+{
+	int errno_copy = errno;
+	va_list ap;
+
+	va_start(ap, format);
+	vlogmsg(pri, format, ap);
+	va_end(ap);
+
+	logmsg(pri, ": %s", strerror(errno_copy));
+}
+
 /* Prefixes for log file messages, indexed by priority */
 const char *logfile_prefix[] = {
 	NULL, NULL, NULL,	/* Unused: LOG_EMERG, LOG_ALERT, LOG_CRIT */
diff --git a/log.h b/log.h
index 7bfd92d..d46bbaa 100644
--- a/log.h
+++ b/log.h
@@ -16,11 +16,18 @@
 void vlogmsg(int pri, const char *format, va_list ap);
 void logmsg(int pri, const char *format, ...)
 	__attribute__((format(printf, 2, 3)));
+void logmsg_perror(int pri, const char *format, ...)
+	__attribute__((format(printf, 2, 3)));
+
+#define err(...)		logmsg(		LOG_ERR,	__VA_ARGS__)
+#define warn(...)		logmsg(		LOG_WARNING,	__VA_ARGS__)
+#define info(...)		logmsg(		LOG_INFO,	__VA_ARGS__)
+#define debug(...)		logmsg(		LOG_DEBUG,	__VA_ARGS__)
 
-#define err(...)	logmsg(LOG_ERR, __VA_ARGS__)
-#define warn(...)	logmsg(LOG_WARNING, __VA_ARGS__)
-#define info(...)	logmsg(LOG_INFO, __VA_ARGS__)
-#define debug(...)	logmsg(LOG_DEBUG, __VA_ARGS__)
+#define err_perror(...)		logmsg_perror(	LOG_ERR,	__VA_ARGS__)
+#define warn_perror(...)	logmsg_perror(	LOG_WARNING,	__VA_ARGS__)
+#define info_perror(...)	logmsg_perror(	LOG_INFO,	__VA_ARGS__)
+#define debug_perror(...)	logmsg_perror(	LOG_DEBUG,	__VA_ARGS__)
 
 #define die(...)							\
 	do {								\
@@ -28,6 +35,12 @@ void logmsg(int pri, const char *format, ...)
 		exit(EXIT_FAILURE);					\
 	} while (0)
 
+#define die_perror(...)							\
+	do {								\
+		err_perror(__VA_ARGS__);				\
+		exit(EXIT_FAILURE);					\
+	} while (0)
+
 extern int log_trace;
 extern bool log_conf_parsed;
 extern bool log_daemonised;
-- 
@@ -16,11 +16,18 @@
 void vlogmsg(int pri, const char *format, va_list ap);
 void logmsg(int pri, const char *format, ...)
 	__attribute__((format(printf, 2, 3)));
+void logmsg_perror(int pri, const char *format, ...)
+	__attribute__((format(printf, 2, 3)));
+
+#define err(...)		logmsg(		LOG_ERR,	__VA_ARGS__)
+#define warn(...)		logmsg(		LOG_WARNING,	__VA_ARGS__)
+#define info(...)		logmsg(		LOG_INFO,	__VA_ARGS__)
+#define debug(...)		logmsg(		LOG_DEBUG,	__VA_ARGS__)
 
-#define err(...)	logmsg(LOG_ERR, __VA_ARGS__)
-#define warn(...)	logmsg(LOG_WARNING, __VA_ARGS__)
-#define info(...)	logmsg(LOG_INFO, __VA_ARGS__)
-#define debug(...)	logmsg(LOG_DEBUG, __VA_ARGS__)
+#define err_perror(...)		logmsg_perror(	LOG_ERR,	__VA_ARGS__)
+#define warn_perror(...)	logmsg_perror(	LOG_WARNING,	__VA_ARGS__)
+#define info_perror(...)	logmsg_perror(	LOG_INFO,	__VA_ARGS__)
+#define debug_perror(...)	logmsg_perror(	LOG_DEBUG,	__VA_ARGS__)
 
 #define die(...)							\
 	do {								\
@@ -28,6 +35,12 @@ void logmsg(int pri, const char *format, ...)
 		exit(EXIT_FAILURE);					\
 	} while (0)
 
+#define die_perror(...)							\
+	do {								\
+		err_perror(__VA_ARGS__);				\
+		exit(EXIT_FAILURE);					\
+	} while (0)
+
 extern int log_trace;
 extern bool log_conf_parsed;
 extern bool log_daemonised;
-- 
2.43.0

next prev parent reply	other threads:[~2024-06-20  4:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-06-20  4:07 [PATCH v4 0/8] Fixes for early logging/prints and related cleanups Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 1/8] conf, passt: Don't try to log to stderr after we close it Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 2/8] conf, passt: Make --stderr do nothing, and deprecate it Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 3/8] conf, log: Instead of abusing log levels, add log_conf_parsed flag Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 4/8] log, passt: Always print to stderr before initialisation is complete Stefano Brivio
2024-06-20  4:34   ` David Gibson
2024-06-20  4:07 ` Stefano Brivio [this message]
2024-06-20  4:07 ` [PATCH v4 6/8] treewide: Replace perror() calls with calls to logging functions Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 7/8] treewide: Replace strerror() calls Stefano Brivio
2024-06-20  4:08 ` [PATCH v4 8/8] conf, passt: Don't call __openlog() if a log file is used Stefano Brivio

find likely ancestor, descendant, or conflicting patches for this message:
dfblob:025129a dfblob:7bfd92d dfblob:a352b06 dfblob:d46bbaa
	(help)

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20240620040800.3065684-6-sbrivio@redhat.com \
    --to=sbrivio@redhat.com \
    --cc=david@gibson.dropbear.id.au \
    --cc=passt-dev@passt.top \
    --cc=yalzhang@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Be sure your reply has a Subject: header at the top and a blank line before the message body.

Code repositories for project(s) associated with this public inbox

	https://passt.top/passt

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for IMAP folder(s).