diff options
| -rw-r--r-- | usr.bin/m4/gnum4.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/usr.bin/m4/gnum4.c b/usr.bin/m4/gnum4.c index 553ef38da1a..3f6c41ee891 100644 --- a/usr.bin/m4/gnum4.c +++ b/usr.bin/m4/gnum4.c @@ -1,4 +1,4 @@ -/* $OpenBSD: gnum4.c,v 1.20 2003/06/08 20:11:45 espie Exp $ */ +/* $OpenBSD: gnum4.c,v 1.21 2003/06/08 22:42:27 espie Exp $ */ /* * Copyright (c) 1999 Marc Espie @@ -436,7 +436,11 @@ dopatsubst(const char *argv[], int argc) /* special case: empty regexp */ if (argv[3][0] == '\0') { const char *s; - size_t len = strlen(argv[4]); + size_t len; + if (argv[4] && argc > 4) + len = strlen(argv[4]); + else + len = 0; for (s = argv[2]; *s != '\0'; s++) { addchars(argv[4], len); addchar(*s); @@ -453,7 +457,7 @@ dopatsubst(const char *argv[], int argc) pmatch = xalloc(sizeof(regmatch_t) * (re.re_nsub+1)); do_subst(argv[2], &re, - argc != 4 && argv[4] != NULL ? argv[4] : "", pmatch); + argc > 4 && argv[4] != NULL ? argv[4] : "", pmatch); free(pmatch); regfree(&re); } |