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authorGuillaume Chazarain <guichaz@yahoo.fr>2006-01-08 01:02:41 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:13:52 -0800
commit025510cd20f4c35c3958bea133d96c9bd7c6ef9e (patch)
treea1d7946374dc6db660ffbf76a1ae862c629566d1
parent2520f14ca85e38f575eed6acc6e586df246abea6 (diff)
[PATCH] printk return value: fix it
What's the true meaning of the printk return value? Should it include the priority prefix length of 3? and what about the timing information? In both cases it was broken: strace -e write echo 1 > /dev/kmsg => write(1, "1\n", 2) = 5 strace -e write echo "<1>1" > /dev/kmsg => write(1, "<1>1\n", 5) = 8 The returned length was "length of input string + 3", I made it "length of string output to the log buffer". Note that I couldn't find any printk caller in the kernel interested by its return value besides kmsg_write. Signed-off-by: Guillaume Chazarain <guichaz@yahoo.fr> Acked-By: Tim Bird <tim.bird@am.sony.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--kernel/printk.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/printk.c b/kernel/printk.c
index 5287be83e3e..2251be80cd2 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -569,7 +569,7 @@ asmlinkage int vprintk(const char *fmt, va_list args)
p[1] <= '7' && p[2] == '>') {
loglev_char = p[1];
p += 3;
- printed_len += 3;
+ printed_len -= 3;
} else {
loglev_char = default_message_loglevel
+ '0';
@@ -584,7 +584,7 @@ asmlinkage int vprintk(const char *fmt, va_list args)
for (tp = tbuf; tp < tbuf + tlen; tp++)
emit_log_char(*tp);
- printed_len += tlen - 3;
+ printed_len += tlen;
} else {
if (p[0] != '<' || p[1] < '0' ||
p[1] > '7' || p[2] != '>') {
@@ -592,8 +592,8 @@ asmlinkage int vprintk(const char *fmt, va_list args)
emit_log_char(default_message_loglevel
+ '0');
emit_log_char('>');
+ printed_len += 3;
}
- printed_len += 3;
}
log_level_unknown = 0;
if (!*p)