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Error handling for getcursorposition - scroll - scrollbackbuffer program for st |
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git clone git://git.suckless.org/scroll |
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--- |
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commit 6f1e4abb64c2d4204c722d5357da004062f90b92 |
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parent 177976ae00fc60658c6f21739a3fd2462a02917f |
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Author: Jochen Sprickerhof <[email protected]> |
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Date: Wed, 15 Apr 2020 23:08:35 +0200 |
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Error handling for getcursorposition |
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Diffstat: |
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M scroll.c | 13 ++++++++++--- |
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1 file changed, 10 insertions(+), 3 deletions(-) |
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--- |
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diff --git a/scroll.c b/scroll.c |
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@@ -254,10 +254,17 @@ void |
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getcursorposition(int *x, int *y) |
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{ |
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char input[BUFSIZ]; |
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- write(STDOUT_FILENO, "\033[6n", 4); |
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- ssize_t n = read(STDIN_FILENO, input, sizeof(input)-1); |
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+ ssize_t n; |
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+ |
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+ if (write(STDOUT_FILENO, "\033[6n", 4) < 0) |
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+ die("requesting cursor position"); |
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+ |
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+ if ((n = read(STDIN_FILENO, input, sizeof(input)-1)) < 0) |
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+ die("reading cursor position"); |
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input[n] = '\0'; |
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- sscanf(input, "\033[%d;%dR", x, y); |
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+ |
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+ if (sscanf(input, "\033[%d;%dR", x, y) != 2) |
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+ die("parsing cursor position"); |
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} |
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void |
