It can be useful to dump the log into the file, e.g. when doing an
update from a USB flash drive with no serial peer attached. Board code
could use log_dprint to dump the log onto the drive. Add a function
to facilitate this.

Signed-off-by: Ahmad Fatoum <[email protected]>
---
 common/console_common.c | 15 +++++++++++++++
 include/printk.h        |  1 +
 2 files changed, 16 insertions(+)

diff --git a/common/console_common.c b/common/console_common.c
index 3e0741572398..77ad4728fbfd 100644
--- a/common/console_common.c
+++ b/common/console_common.c
@@ -182,6 +182,21 @@ static int console_common_init(void)
 }
 device_initcall(console_common_init);
 
+int log_dprint(int fd)
+{
+       struct log_entry *log;
+       int nbytes = 0;
+
+       list_for_each_entry(log, &barebox_logbuf, list) {
+               int ret = dputs(fd, log->msg);
+               if (ret < 0)
+                       return ret;
+               nbytes += ret;
+       }
+
+       return nbytes;
+}
+
 void log_print(unsigned flags, unsigned levels)
 {
        struct log_entry *log;
diff --git a/include/printk.h b/include/printk.h
index 94a25ec9ebac..798acfdbf188 100644
--- a/include/printk.h
+++ b/include/printk.h
@@ -141,6 +141,7 @@ extern void log_clean(unsigned int limit);
 #define BAREBOX_LOG_PRINT_ALERT                BIT(1)
 #define BAREBOX_LOG_PRINT_EMERG                BIT(0)
 
+int log_dprint(int fd);
 void log_print(unsigned flags, unsigned levels);
 
 struct va_format {
-- 
2.29.2


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