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cpukit/shell: Add window size retrieval control

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This adds an environment variable that can be used to enable or disable
window size retrieval for the RTEMS shell. This will also disable window
size retrieval upon failure while allowing the user to re-enable it.
This commit is contained in:
Kinsey Moore
2024-07-12 08:30:29 -05:00
committed by Amar Takhar
parent 8eb4932b13
commit 174b69afd6
1 changed files with 17 additions and 0 deletions
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17
cpukit/libmisc/shell/shell.c
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@@ -936,6 +936,21 @@ static void rtems_shell_winsize( void )
int lines = 0;
int cols = 0;
int r;
const char *detect = getenv("TERM_SIZE_DETECT");
if (detect) {
/* Skip window size detection if set to False, false, or 0 */
if (strcmp(detect, "false") == 0) {
return;
}
if (strcmp(detect, "False") == 0) {
return;
}
if (strcmp(detect, "0") == 0) {
return;
}
}
r = ioctl(fd, TIOCGWINSZ, &ws);
if (r == 0) {
ok = true;
@@ -992,6 +1007,8 @@ static void rtems_shell_winsize( void )
setenv("LINES", buf, 1);
snprintf(buf, sizeof(buf) - 1, "%d", cols);
setenv("COLUMNS", buf, 1);
} else {
setenv("TERM_SIZE_DETECT", "0", 1);
}
}