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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-08-02 22:23:47 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-08-02 22:23:47 +0000
commitc01af95c398b21203cd991917101e29b21821284 (patch)
treec93fdf7527f67950364d8e355ffaa6073d99688e /miscutils
parent1caca34aa67b2f267d0049d17e5430ca9c58ac3f (diff)
downloadbusybox-c01af95c398b21203cd991917101e29b21821284.tar.gz
busybox-c01af95c398b21203cd991917101e29b21821284.tar.bz2
ttysize: new applet. +200 bytes
Diffstat (limited to 'miscutils')
-rw-r--r--miscutils/Config.in8
-rw-r--r--miscutils/Kbuild1
-rw-r--r--miscutils/ttysize.c39
3 files changed, 48 insertions, 0 deletions
diff --git a/miscutils/Config.in b/miscutils/Config.in
index 170310fda..3dd2674d6 100644
--- a/miscutils/Config.in
+++ b/miscutils/Config.in
@@ -366,6 +366,14 @@ config TIME
When the command finishes, time writes a message to standard output
giving timing statistics about this program run.
+config TTYSIZE
+ bool "ttysize"
+ default n
+ help
+ A replacement for "stty size". Unlike stty, can report only width,
+ only height, or both, in any order. It also does not complain on error,
+ but returns default 80x24. Usage in shell scripts: width=`ttysize w`.
+
config WATCHDOG
bool "watchdog"
default n
diff --git a/miscutils/Kbuild b/miscutils/Kbuild
index 22b4564df..b420d68e7 100644
--- a/miscutils/Kbuild
+++ b/miscutils/Kbuild
@@ -27,4 +27,5 @@ lib-$(CONFIG_SETSID) += setsid.o
lib-$(CONFIG_STRINGS) += strings.o
lib-$(CONFIG_TASKSET) += taskset.o
lib-$(CONFIG_TIME) += time.o
+lib-$(CONFIG_TTYSIZE) += ttysize.o
lib-$(CONFIG_WATCHDOG) += watchdog.o
diff --git a/miscutils/ttysize.c b/miscutils/ttysize.c
new file mode 100644
index 000000000..c1b702c2c
--- /dev/null
+++ b/miscutils/ttysize.c
@@ -0,0 +1,39 @@
+/*
+ * Replacement for "stty size", which is awkward for shell script use.
+ * - Allows to request width, height, or both, in any order.
+ * - Does not complain on error, but returns default 80x24.
+ * - Size: less than 200 bytes
+ */
+#include "libbb.h"
+
+int ttysize_main(int argc, char **argv);
+int ttysize_main(int argc, char **argv)
+{
+ unsigned w,h;
+ struct winsize wsz;
+
+ w = 80;
+ h = 24;
+ if (!ioctl(0, TIOCGWINSZ, &wsz)) {
+ w = wsz.ws_col;
+ h = wsz.ws_row;
+ }
+
+ if (argc == 1) {
+ printf("%u %u", w, h);
+ } else {
+ const char *fmt, *arg;
+
+ fmt = "%u %u" + 3; /* "%u" */
+ while ((arg = *++argv) != NULL) {
+ char c = arg[0];
+ if (c == 'w')
+ printf(fmt, w);
+ if (c == 'h')
+ printf(fmt, h);
+ fmt = "%u %u" + 2; /* " %u" */
+ }
+ }
+ putchar('\n');
+ return 0;
+}