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authorEric Andersen <andersen@codepoet.org>2004-03-23 23:15:36 +0000
committerEric Andersen <andersen@codepoet.org>2004-03-23 23:15:36 +0000
commit97310d025390e96f34140cff13034fcd2b5da18f (patch)
treebe9b3406b9b0598d0bc42d6912a7855f7ee11819 /util-linux
parent6bb80870b839cc812d55b28f886bf3e001e4a00e (diff)
downloadbusybox-97310d025390e96f34140cff13034fcd2b5da18f.tar.gz
Brian Pomerantz writes:
I've noticed a bug in the "autowidth" feature more, and is probably in others. The call to the function get_terminal_width_height() passes in a file descriptor but that file descriptor is never used, instead the ioctl() is called with 0. In more_main() the call to get_terminal_width_height() passes 0 as the file descriptor instead of fileno(cin). This isn't a problem when you more a file (e.g. "more /etc/passwd") but when you pipe a file to it (e.g. "cat /etc/passwd | more") the size of the terminal cannot be determined because file descriptor 0 is not a terminal. The fix is simple, I've attached a patch for more.c and get_terminal_width_height.c. BAPper
Diffstat (limited to 'util-linux')
-rw-r--r--util-linux/more.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/util-linux/more.c b/util-linux/more.c
index d7b7ce22f..04b29de17 100644
--- a/util-linux/more.c
+++ b/util-linux/more.c
@@ -67,6 +67,7 @@ extern int more_main(int argc, char **argv)
int please_display_more_prompt = -1;
struct stat st;
FILE *file;
+ FILE *in_file = stdin;
int len, page_height;
argc--;
@@ -78,6 +79,7 @@ extern int more_main(int argc, char **argv)
cin = fopen(CURRENT_TTY, "r");
if (!cin)
cin = bb_xfopen(CONSOLE_DEV, "r");
+ in_file = cin;
please_display_more_prompt = 0;
#ifdef CONFIG_FEATURE_USE_TERMIOS
getTermSettings(fileno(cin), &initial_settings);
@@ -108,7 +110,7 @@ extern int more_main(int argc, char **argv)
if(please_display_more_prompt>0)
please_display_more_prompt = 0;
- get_terminal_width_height(0, &terminal_width, &terminal_height);
+ get_terminal_width_height(fileno(in_file), &terminal_width, &terminal_height);
if (terminal_height > 4)
terminal_height -= 2;
if (terminal_width > 0)