diff options
Diffstat (limited to 'posix')
| -rw-r--r-- | posix/wordexp.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/posix/wordexp.c b/posix/wordexp.c index 268a0e8c86..1df552a66f 100644 --- a/posix/wordexp.c +++ b/posix/wordexp.c @@ -1220,10 +1220,9 @@ parse_param (char **word, size_t *word_length, size_t *max_length, continue; } - special = (strchr ("*@$", words[*offset]) != NULL - || isdigit (words[*offset])); + special = strchr ("*@$", words[*offset]) != NULL; - if (!isalpha (words[*offset]) && !special) + if (!isalnum (words[*offset]) && !special) /* Stop and evaluate, remembering char we stopped at */ break; @@ -1273,11 +1272,13 @@ envsubst: } /* Is it a special parameter? */ - if (strpbrk (env, "0123456789*@$")) + if (strpbrk (env, "*@$") || isdigit (*env)) { - if (env[1]) + if ((isdigit(*env) && strcspn (env, "1234567890")) || + (!isdigit(*env) && env[1] != '\0')) { - /* Bad substitution if there is more than one character */ + /* Bad substitution if it isn't "*", "@", "$", or just a number. */ + bad_subst: free (env); fprintf (stderr, "${%s}: bad substitution\n", env); return WRDE_SYNTAX; @@ -1286,7 +1287,11 @@ envsubst: /* Is it a digit? */ if (isdigit(*env)) { - int n = *env - '0'; + char *endp; + int n = strtol (env, &endp, 10); + + if (*endp != '\0') + goto bad_subst; free (env); if (n >= __libc_argc) |