diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/dynamic_debug.c | 53 |
1 files changed, 33 insertions, 20 deletions
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 9e123ae326bc..833139ce1e22 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -196,32 +196,45 @@ static void ddebug_change(const struct ddebug_query *query, } /* - * Wrapper around strsep() to collapse the multiple empty tokens - * that it returns when fed sequences of separator characters. - * Now, if we had strtok_r()... - */ -static inline char *nearly_strtok_r(char **p, const char *sep) -{ - char *r; - - while ((r = strsep(p, sep)) != NULL && *r == '\0') - ; - return r; -} - -/* * Split the buffer `buf' into space-separated words. - * Return the number of such words or <0 on error. + * Handles simple " and ' quoting, i.e. without nested, + * embedded or escaped \". Return the number of words + * or <0 on error. */ static int ddebug_tokenize(char *buf, char *words[], int maxwords) { int nwords = 0; - while (nwords < maxwords && - (words[nwords] = nearly_strtok_r(&buf, " \t\r\n")) != NULL) - nwords++; - if (buf) - return -EINVAL; /* ran out of words[] before bytes */ + while (*buf) { + char *end; + + /* Skip leading whitespace */ + while (*buf && isspace(*buf)) + buf++; + if (!*buf) + break; /* oh, it was trailing whitespace */ + + /* Run `end' over a word, either whitespace separated or quoted */ + if (*buf == '"' || *buf == '\'') { + int quote = *buf++; + for (end = buf ; *end && *end != quote ; end++) + ; + if (!*end) + return -EINVAL; /* unclosed quote */ + } else { + for (end = buf ; *end && !isspace(*end) ; end++) + ; + BUG_ON(end == buf); + } + /* Here `buf' is the start of the word, `end' is one past the end */ + + if (nwords == maxwords) + return -EINVAL; /* ran out of words[] before bytes */ + if (*end) + *end++ = '\0'; /* terminate the word */ + words[nwords++] = buf; + buf = end; + } if (verbose) { int i; |