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From: Stefano Brivio <sbrivio@redhat.com>
To: passt-dev@passt.top
Cc: Yalan Zhang <yalzhang@redhat.com>
Subject: [PATCH 4/6] log: Add _perror() logging function variants
Date: Mon, 17 Jun 2024 14:03:17 +0200	[thread overview]
Message-ID: <20240617120319.1206857-5-sbrivio@redhat.com> (raw)
In-Reply-To: <20240617120319.1206857-1-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>
---
 log.c | 21 +++++++++++++++++++++
 log.h | 21 +++++++++++++++++----
 2 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/log.c b/log.c
index 939bb93..6764b2b 100644
--- a/log.c
+++ b/log.c
@@ -80,6 +80,11 @@ 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;
@@ -89,6 +94,22 @@ 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, ...)
+{
+	va_list ap;
+
+	logmsg(pri, "%s: ", strerror(errno));
+
+	va_start(ap, format);
+	vlogmsg(pri, format, ap);
+	va_end(ap);
+}
+
 /* 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 680baab..5be0be9 100644
--- a/log.h
+++ b/log.h
@@ -19,11 +19,18 @@
 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 {								\
@@ -31,6 +38,12 @@ 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;
 void trace_init(int enable);
 #define trace(...)							\
-- 
@@ -19,11 +19,18 @@
 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 {								\
@@ -31,6 +38,12 @@ 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;
 void trace_init(int enable);
 #define trace(...)							\
-- 
2.43.0


  parent reply	other threads:[~2024-06-17 12:03 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-06-17 12:03 [PATCH 0/6] Fixes for early logging/prints and related cleanups Stefano Brivio
2024-06-17 12:03 ` [PATCH 1/6] conf, passt: Don't try to log to stderr after we close it Stefano Brivio
2024-06-18  0:36   ` David Gibson
2024-06-18  6:00     ` Stefano Brivio
2024-06-19  2:06       ` David Gibson
2024-06-19  8:13         ` Stefano Brivio
2024-06-20  0:12           ` David Gibson
2024-06-17 12:03 ` [PATCH 2/6] conf, log: Introduce internal log flags, instead of abusing log levels Stefano Brivio
2024-06-18  0:39   ` David Gibson
2024-06-18  6:01     ` Stefano Brivio
2024-06-17 12:03 ` [PATCH 3/6] log, passt: Always print to stderr before initialisation is complete Stefano Brivio
2024-06-18  0:44   ` David Gibson
2024-06-18  6:01     ` Stefano Brivio
2024-06-19  2:10       ` David Gibson
2024-06-19  8:17         ` Stefano Brivio
2024-06-20  0:12           ` David Gibson
2024-06-17 12:03 ` Stefano Brivio [this message]
2024-06-18  0:46   ` [PATCH 4/6] log: Add _perror() logging function variants David Gibson
2024-06-18  6:02     ` Stefano Brivio
2024-06-19  2:11       ` David Gibson
2024-06-19  8:25         ` Stefano Brivio
2024-06-20  0:13           ` David Gibson
2024-06-17 12:03 ` [PATCH 5/6] treewide: Replace perror() calls with calls to logging functions Stefano Brivio
2024-06-18  0:50   ` David Gibson
2024-06-17 12:03 ` [PATCH 6/6] treewide: Replace strerror() calls Stefano Brivio
2024-06-18  0:51   ` David Gibson
2024-06-18  6:02     ` Stefano Brivio

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