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-rw-r--r--shell/math.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/shell/math.c b/shell/math.c
index eaf4f2453..0c806ad39 100644
--- a/shell/math.c
+++ b/shell/math.c
@@ -538,9 +538,16 @@ static arith_t strto_arith_t(const char *nptr, char **endptr)
538 n = 0; 538 n = 0;
539 nptr = *endptr + 1; 539 nptr = *endptr + 1;
540 /* bash allows "N#" (empty "nnnn" part) */ 540 /* bash allows "N#" (empty "nnnn" part) */
541 while (isdigit(*nptr)) { 541 for (;;) {
542 unsigned digit = (unsigned)*nptr - '0';
543 if (digit >= 10 || digit >= base) {
544 digit = (unsigned)(*nptr | 0x20) - ('a' - 10);
545 if (digit >= base)
546 break;
547 }
542 /* bash does not check for overflows */ 548 /* bash does not check for overflows */
543 n = n * base + (*nptr++ - '0'); 549 n = n * base + digit;
550 nptr++;
544 } 551 }
545 *endptr = (char*)nptr; 552 *endptr = (char*)nptr;
546 return n; 553 return n;