commit 6f1e4abb64c2d4204c722d5357da004062f90b92
Author: Jochen Sprickerhof <[email protected]>
AuthorDate: Wed Apr 15 23:08:35 2020 +0200
Commit: Jochen Sprickerhof <[email protected]>
CommitDate: Wed Apr 15 23:08:35 2020 +0200
Error handling for getcursorposition
diff --git a/scroll.c b/scroll.c
index dd44d8d..a87ac88 100644
--- a/scroll.c
+++ b/scroll.c
@@ -254,10 +254,17 @@ void
getcursorposition(int *x, int *y)
{
char input[BUFSIZ];
- write(STDOUT_FILENO, "\033[6n", 4);
- ssize_t n = read(STDIN_FILENO, input, sizeof(input)-1);
+ ssize_t n;
+
+ if (write(STDOUT_FILENO, "\033[6n", 4) < 0)
+ die("requesting cursor position");
+
+ if ((n = read(STDIN_FILENO, input, sizeof(input)-1)) < 0)
+ die("reading cursor position");
input[n] = '\0';
- sscanf(input, "\033[%d;%dR", x, y);
+
+ if (sscanf(input, "\033[%d;%dR", x, y) != 2)
+ die("parsing cursor position");
}
void
