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Check for format character precision argument before using it

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This commit is contained in:
Cody Peter Mello 2018-09-14 17:29:06 -07:00
parent 2dc7e5ff1a
commit 6cf37e9d15
4 changed files with 9 additions and 0 deletions
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3
bugs-fixed/README
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@ -23,3 +23,6 @@ and also if CONVFMT changed.
7. unary-plus: Unary plus on a string constant returned the string. 7. unary-plus: Unary plus on a string constant returned the string.
Instead, it should convert the value to numeric and give that value. Instead, it should convert the value to numeric and give that value.
8. missing-precision: When using the format string "%*s", the precision
argument was used without checking if it was present first.

1
bugs-fixed/missing-precision.awk Normal file
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@ -0,0 +1 @@
BEGIN { printf("%*s"); }

2
bugs-fixed/missing-precision.ok Normal file
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@ -0,0 +1,2 @@
./a.out: not enough args in printf(%*s)
source line number 1

3
run.c
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@ -863,6 +863,9 @@ int format(char **pbuf, int *pbufsize, const char *s, Node *a) /* printf-like co
FATAL("'$' not permitted in awk formats"); FATAL("'$' not permitted in awk formats");
} }
if (*s == '*') { if (*s == '*') {
if (a == NULL) {
FATAL("not enough args in printf(%s)", os);
}
x = execute(a); x = execute(a);
a = a->nnext; a = a->nnext;
sprintf(t-1, "%d", fmtwd=(int) getfval(x)); sprintf(t-1, "%d", fmtwd=(int) getfval(x));