# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1203606846 0
# Node ID 9f39827ea86ad15f21a07fe75ac3859d16f44b4c
# Parent 068936bf586a61c76ffecfb9717502b54155560b
xenconsoled: don't force newline with timestamps
Previously a newline was forced after every call to
write_with_timestamp. This could result in some ugly logs when a
single console line stretched over multiple calls. This change carries
some extra state to determine if we ended the last call to
write_with_timestamp on a newline, and prints the timestamp as
appropriate.
This also fixes a bug where logging hv messages was dependent on the
guest timestamp flag.
Signed-off-by: Cole Robinson <crobinso@xxxxxxxxxx>
xen-unstable changeset: 17095:28dcae176191b7b5aadc2bed44e252f0f5b5fb71
xen-unstable date: Wed Feb 20 18:00:28 2008 +0000
---
tools/console/daemon/io.c | 91 +++++++++++++++++++++++++++-------------------
1 files changed, 54 insertions(+), 37 deletions(-)
diff -r 068936bf586a -r 9f39827ea86a tools/console/daemon/io.c
--- a/tools/console/daemon/io.c Thu Feb 21 15:13:42 2008 +0000
+++ b/tools/console/daemon/io.c Thu Feb 21 15:14:06 2008 +0000
@@ -64,13 +64,14 @@ extern int log_time_guest;
extern int log_time_guest;
extern char *log_dir;
+static int log_time_hv_needts = 1;
+static int log_time_guest_needts = 1;
static int log_hv_fd = -1;
static evtchn_port_or_error_t log_hv_evtchn = -1;
static int xc_handle = -1;
static int xce_handle = -1;
-struct buffer
-{
+struct buffer {
char *data;
size_t consumed;
size_t size;
@@ -78,8 +79,7 @@ struct buffer
size_t max_capacity;
};
-struct domain
-{
+struct domain {
int domid;
int master_fd;
int slave_fd;
@@ -116,30 +116,32 @@ static int write_all(int fd, const char*
return 0;
}
-static int write_with_timestamp(int fd, const char *data, size_t sz)
-{
- char buf[sz+1];
+static int write_with_timestamp(int fd, const char *data, size_t sz,
+ int *needts)
+{
char ts[32];
time_t now = time(NULL);
const struct tm *tmnow = localtime(&now);
size_t tslen = strftime(ts, sizeof(ts), "[%Y-%m-%d %H:%M:%S] ", tmnow);
-
- memcpy(buf, data, sz);
- while (sz > 0 && buf[sz-1] == '\r')
- sz--; // Don't print trailing \r's
- if (sz > 0 && buf[sz-1] != '\n')
- buf[sz++] = '\n'; // Force ending newline
- data = buf;
-
- while (sz > 0) {
- const char *nl = strchr(data, '\n') + 1;
- size_t towrite = nl - data;
- if (write_all(fd, ts, tslen) < 0)
+ const char *last_byte = data + sz - 1;
+
+ while (data <= last_byte) {
+ const char *nl = memchr(data, '\n', sz);
+ int found_nl = (nl != NULL);
+ if (!found_nl)
+ nl = last_byte;
+
+ if ((*needts && write_all(fd, ts, tslen))
+ || write_all(fd, data, nl + 1 - data))
return -1;
- if (write_all(fd, data, towrite))
- return -1;
- sz -= towrite;
- data = nl;
+
+ *needts = found_nl;
+ data = nl + 1;
+ if (found_nl) {
+ // If we printed a newline, strip all \r following it
+ while (data <= last_byte && *data == '\r')
+ data++;
+ }
}
return 0;
@@ -183,12 +185,19 @@ static void buffer_append(struct domain
if (dom->log_fd != -1) {
int logret;
if (log_time_guest) {
- logret = write_with_timestamp(dom->log_fd, buffer->data
+ buffer->size - size, size);
+ logret = write_with_timestamp(
+ dom->log_fd,
+ buffer->data + buffer->size - size,
+ size, &log_time_guest_needts);
} else {
- logret = write_all(dom->log_fd, buffer->data +
buffer->size - size, size);
- }
+ logret = write_all(
+ dom->log_fd,
+ buffer->data + buffer->size - size,
+ size);
+ }
if (logret < 0)
- dolog(LOG_ERR, "Write to log failed on domain %d: %d
(%s)\n",
+ dolog(LOG_ERR, "Write to log failed "
+ "on domain %d: %d (%s)\n",
dom->domid, errno, strerror(errno));
}
@@ -246,7 +255,8 @@ static int create_hv_log(void)
logfile, errno, strerror(errno));
if (fd != -1 && log_time_hv) {
if (write_with_timestamp(fd, "Logfile Opened",
- strlen("Logfile Opened")) < 0) {
+ strlen("Logfile Opened"),
+ &log_time_hv_needts) < 0) {
dolog(LOG_ERR, "Failed to log opening timestamp "
"in %s: %d (%s)", logfile, errno,
strerror(errno));
@@ -289,7 +299,8 @@ static int create_domain_log(struct doma
logfile, errno, strerror(errno));
if (fd != -1 && log_time_guest) {
if (write_with_timestamp(fd, "Logfile Opened",
- strlen("Logfile Opened")) < 0) {
+ strlen("Logfile Opened"),
+ &log_time_guest_needts) < 0) {
dolog(LOG_ERR, "Failed to log opening timestamp "
"in %s: %d (%s)", logfile, errno,
strerror(errno));
@@ -314,7 +325,7 @@ static void domain_close_tty(struct doma
#ifdef __sun__
static int openpty(int *amaster, int *aslave, char *name,
- struct termios *termp, struct winsize *winp)
+ struct termios *termp, struct winsize *winp)
{
const char *slave;
int mfd = -1, sfd = -1;
@@ -389,14 +400,16 @@ static int domain_create_tty(struct doma
if (openpty(&dom->master_fd, &dom->slave_fd, NULL, &term, NULL) < 0) {
err = errno;
- dolog(LOG_ERR, "Failed to create tty for domain-%d (errno = %i,
%s)",
+ dolog(LOG_ERR, "Failed to create tty for domain-%d "
+ "(errno = %i, %s)",
dom->domid, err, strerror(err));
return 0;
}
if ((slave = ptsname(dom->master_fd)) == NULL) {
err = errno;
- dolog(LOG_ERR, "Failed to get slave name for domain-%d (errno =
%i, %s)",
+ dolog(LOG_ERR, "Failed to get slave name for domain-%d "
+ "(errno = %i, %s)",
dom->domid, err, strerror(err));
goto out;
}
@@ -886,8 +899,9 @@ static void handle_hv_logs(void)
if (xc_readconsolering(xc_handle, &bufptr, &size, 0, 1, &index) == 0 &&
size > 0) {
int logret;
- if (log_time_guest)
- logret = write_with_timestamp(log_hv_fd, buffer, size);
+ if (log_time_hv)
+ logret = write_with_timestamp(log_hv_fd, buffer, size,
+ &log_time_hv_needts);
else
logret = write_all(log_hv_fd, buffer, size);
@@ -1048,14 +1062,17 @@ void handle_io(void)
n = d->next;
if (d->event_count < RATE_LIMIT_ALLOWANCE) {
if (d->xce_handle != -1 &&
- FD_ISSET(xc_evtchn_fd(d->xce_handle),
&readfds))
+ FD_ISSET(xc_evtchn_fd(d->xce_handle),
+ &readfds))
handle_ring_read(d);
}
- if (d->master_fd != -1 && FD_ISSET(d->master_fd,
&readfds))
+ if (d->master_fd != -1 && FD_ISSET(d->master_fd,
+ &readfds))
handle_tty_read(d);
- if (d->master_fd != -1 && FD_ISSET(d->master_fd,
&writefds))
+ if (d->master_fd != -1 && FD_ISSET(d->master_fd,
+ &writefds))
handle_tty_write(d);
if (d->is_dead)
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