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tools: kwboot: Fix detection of quit esc sequence

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Quit esc sequence may be also in the middle of the read buffer.
Fix the detection for that case.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár 2022-02-03 17:45:20 +01:00 committed by Stefan Roese
parent f99a169c19
commit de7514046e
1 changed files with 11 additions and 8 deletions
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19
tools/kwboot.c
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@ -1183,10 +1183,10 @@ kwboot_xmodem(int tty, const void *_img, size_t size, int baudrate)
static int
kwboot_term_pipe(int in, int out, const char *quit, int *s)
{
char buf[128];
ssize_t nin;
char _buf[128], *buf = _buf;
nin = read(in, buf, sizeof(_buf));
nin = read(in, buf, sizeof(buf));
if (nin <= 0)
return -1;
@ -1194,18 +1194,21 @@ kwboot_term_pipe(int in, int out, const char *quit, int *s)
int i;
for (i = 0; i < nin; i++) {
if (*buf == quit[*s]) {
if (buf[i] == quit[*s]) {
(*s)++;
if (!quit[*s])
return 0;
buf++;
nin--;
if (!quit[*s]) {
nin = i - *s;
break;
}
} else {
if (kwboot_write(out, quit, *s) < 0)
if (*s > i && kwboot_write(out, quit, *s - i) < 0)
return -1;
*s = 0;
}
}
if (i == nin)
nin -= *s;
}
if (kwboot_write(out, buf, nin) < 0)