All the output assumes the terminal width is 80 cols min, check the terminal
size in order to detect a smaller terminal and prevent to have a nested
output.
Signed-off-by: Daniel Lezcano <daniel.lezc...@linaro.org>
---
idlestat.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/idlestat.c b/idlestat.c
index a0ef2dd..245be9e 100644
--- a/idlestat.c
+++ b/idlestat.c
@@ -34,6 +34,7 @@
#include <sched.h>
#include <string.h>
#include <float.h>
+#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/resource.h>
@@ -1380,6 +1381,23 @@ static int execute(int argc, char *argv[], char *const
envp[],
return -1;
}
+static int check_window_size(void)
+{
+ struct winsize winsize;
+
+ /* Output is redirected */
+ if (!isatty(STDOUT_FILENO))
+ return 0;
+
+ /* Get terminal window size */
+ ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize);
+
+ if (winsize.ws_col >= 80)
+ return 0;
+
+ return -1;
+}
+
int main(int argc, char *argv[], char *const envp[])
{
struct cpuidle_datas *datas;
@@ -1397,6 +1415,12 @@ int main(int argc, char *argv[], char *const envp[])
return -1;
}
+ if (check_window_size()) {
+ fprintf(stderr, "The terminal must be at least "
+ "80 columns wide\n");
+ return -1;
+ }
+
/* init cpu topoinfo */
init_cpu_topo_info();
--
1.7.9.5
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