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authorJoe Hershberger <joe.hershberger@ni.com>2012-10-03 13:09:15 +0000
committerTom Rini <trini@ti.com>2012-10-03 16:13:34 -0700
commitbb64d1c92fbbc2441772f2eb9b4527499955c04e (patch)
treee0e6c9db0ce729c2996c9e63ecaedfa5b830e687
parentda83bcd7b33d9e4dca3913cb5c0827dce0f8672a (diff)
downloadu-boot-linaro-stable-bb64d1c92fbbc2441772f2eb9b4527499955c04e.tar.gz
Output strings from echo with puts where easy
Change echo to puts characters together where it knows about them together. This improves netconsole performance by greatly reducing the number of packets that are sent. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
-rw-r--r--common/cmd_echo.c28
1 files changed, 21 insertions, 7 deletions
diff --git a/common/cmd_echo.c b/common/cmd_echo.c
index 43a6da572..1e499fb0d 100644
--- a/common/cmd_echo.c
+++ b/common/cmd_echo.c
@@ -30,17 +30,31 @@ int do_echo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
int putnl = 1;
for (i = 1; i < argc; i++) {
- char *p = argv[i], c;
+ char *p = argv[i];
+ char *nls; /* new-line suppression */
if (i > 1)
putc(' ');
- while ((c = *p++) != '\0') {
- if (c == '\\' && *p == 'c') {
- putnl = 0;
- p++;
- } else {
- putc(c);
+
+ nls = strstr(p, "\\c");
+ if (nls) {
+ char *prenls = p;
+
+ putnl = 0;
+ /*
+ * be paranoid and guess that someone might
+ * say \c more than once
+ */
+ while (nls) {
+ *nls = '\0';
+ puts(prenls);
+ *nls = '\\';
+ prenls = nls + 2;
+ nls = strstr(prenls, "\\c");
}
+ puts(prenls);
+ } else {
+ puts(p);
}
}