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log: Don't prefix message with timestamp on --debug if it's a continuation

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If we prefix the second part of messages printed through
logmsg_perror() by the timestamp, on debug, we'll have two timestamps
and a weird separator in the result, such as this beauty:

  0.0013: Failed to clone process with detached namespaces0.0013: : Operation not permitted

Add a parameter to logmsg() and vlogmsg() which indicates a message
continuation. If that's set, don't print the timestamp in vlogmsg().

Link: https://github.com/moby/moby/issues/48257#issuecomment-2282875092
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Stefano Brivio 2024-08-12 10:20:34 +02:00
parent baccfb95ce
commit fecb1b65b1
3 changed files with 21 additions and 18 deletions

22
log.h
View file

@ -13,21 +13,21 @@
#define LOGFILE_CUT_RATIO 30 /* When full, cut ~30% size */
#define LOGFILE_SIZE_MIN (5UL * MAX(BUFSIZ, PAGE_SIZE))
void vlogmsg(bool newline, int pri, const char *format, va_list ap);
void logmsg(bool newline, int pri, const char *format, ...)
__attribute__((format(printf, 3, 4)));
void vlogmsg(bool newline, bool cont, int pri, const char *format, va_list ap);
void logmsg(bool newline, bool cont, int pri, const char *format, ...)
__attribute__((format(printf, 4, 5)));
void logmsg_perror(int pri, const char *format, ...)
__attribute__((format(printf, 2, 3)));
#define err(...) logmsg(true, LOG_ERR, __VA_ARGS__)
#define warn(...) logmsg(true, LOG_WARNING, __VA_ARGS__)
#define info(...) logmsg(true, LOG_INFO, __VA_ARGS__)
#define debug(...) logmsg(true, LOG_DEBUG, __VA_ARGS__)
#define err(...) logmsg(true, false, LOG_ERR, __VA_ARGS__)
#define warn(...) logmsg(true, false, LOG_WARNING, __VA_ARGS__)
#define info(...) logmsg(true, false, LOG_INFO, __VA_ARGS__)
#define debug(...) logmsg(true, false, 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 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 { \