time-util: make parse_sec() not accept "12.34.56"
This also changes the rational number treatment. So, the limitations introduced by8079c90333andf6a178e91dare relaxed. Fixes #10619.
This commit is contained in:
Yu Watanabe
committed by
Lennart Poettering
Lennart Poettering
parent
a0ca258adf
commit
ed2e7967be
+111
-102
@@ -868,7 +868,7 @@ int parse_timestamp(const char *t, usec_t *usec) {
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return tmp.return_value;
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}
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static char* extract_multiplier(char *p, usec_t *multiplier) {
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static const char* extract_multiplier(const char *p, usec_t *multiplier) {
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static const struct {
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const char *suffix;
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usec_t usec;
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@@ -942,8 +942,7 @@ int parse_time(const char *t, usec_t *usec, usec_t default_unit) {
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for (;;) {
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usec_t multiplier = default_unit, k;
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long long l, z = 0;
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unsigned n = 0;
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long long l;
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char *e;
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p += strspn(p, WHITESPACE);
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@@ -966,46 +965,47 @@ int parse_time(const char *t, usec_t *usec, usec_t default_unit) {
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return -ERANGE;
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if (*e == '.') {
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char *b = e + 1;
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/* Don't allow "0.-0", "3.+1" or "3. 1" */
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if (IN_SET(*b, '-', '+') || isspace(*b))
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return -EINVAL;
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errno = 0;
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z = strtoll(b, &e, 10);
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if (errno > 0)
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return -errno;
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if (z < 0)
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return -ERANGE;
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if (e == b)
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return -EINVAL;
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n = e - b;
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p = e + 1;
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p += strspn(p, DIGITS);
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} else if (e == p)
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return -EINVAL;
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else
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p = e;
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e += strspn(e, WHITESPACE);
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p = extract_multiplier(e, &multiplier);
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s = extract_multiplier(p + strspn(p, WHITESPACE), &multiplier);
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if (s == p && *s != '\0')
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/* Don't allow '12.34.56', but accept '12.34 .56' or '12.34s.56'*/
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return -EINVAL;
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something = true;
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p = s;
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k = ((usec_t) -1) / multiplier;
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if ((usec_t) l + 1 >= k || (usec_t) z >= k)
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if ((usec_t) l >= USEC_INFINITY / multiplier)
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return -ERANGE;
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k = (usec_t) z * multiplier;
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for (; n > 0; n--)
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k /= 10;
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k += (usec_t) l * multiplier;
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if (k >= ((usec_t) -1) - r)
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k = (usec_t) l * multiplier;
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if (k >= USEC_INFINITY - r)
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return -ERANGE;
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r += k;
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something = true;
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if (*e == '.') {
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usec_t m = multiplier / 10;
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const char *b;
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for (b = e + 1; *b >= '0' && *b <= '9'; b++, m /= 10) {
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k = (usec_t) (*b - '0') * m;
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if (k >= USEC_INFINITY - r)
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return -ERANGE;
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r += k;
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}
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/* Don't allow "0.-0", "3.+1", "3. 1", "3.sec" or "3.hoge"*/
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if (b == e + 1)
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return -EINVAL;
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}
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}
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*usec = r;
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@@ -1032,44 +1032,60 @@ int parse_sec_fix_0(const char *t, usec_t *ret) {
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return r;
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}
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int parse_nsec(const char *t, nsec_t *nsec) {
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static const char* extract_nsec_multiplier(const char *p, nsec_t *multiplier) {
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static const struct {
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const char *suffix;
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nsec_t nsec;
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} table[] = {
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{ "seconds", NSEC_PER_SEC },
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{ "second", NSEC_PER_SEC },
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{ "sec", NSEC_PER_SEC },
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{ "s", NSEC_PER_SEC },
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{ "seconds", NSEC_PER_SEC },
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{ "second", NSEC_PER_SEC },
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{ "sec", NSEC_PER_SEC },
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{ "s", NSEC_PER_SEC },
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{ "minutes", NSEC_PER_MINUTE },
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{ "minute", NSEC_PER_MINUTE },
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{ "min", NSEC_PER_MINUTE },
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{ "months", NSEC_PER_MONTH },
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{ "month", NSEC_PER_MONTH },
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{ "msec", NSEC_PER_MSEC },
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{ "ms", NSEC_PER_MSEC },
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{ "m", NSEC_PER_MINUTE },
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{ "hours", NSEC_PER_HOUR },
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{ "hour", NSEC_PER_HOUR },
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{ "hr", NSEC_PER_HOUR },
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{ "h", NSEC_PER_HOUR },
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{ "days", NSEC_PER_DAY },
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{ "day", NSEC_PER_DAY },
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{ "d", NSEC_PER_DAY },
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{ "weeks", NSEC_PER_WEEK },
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{ "week", NSEC_PER_WEEK },
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{ "w", NSEC_PER_WEEK },
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{ "years", NSEC_PER_YEAR },
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{ "year", NSEC_PER_YEAR },
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{ "y", NSEC_PER_YEAR },
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{ "usec", NSEC_PER_USEC },
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{ "us", NSEC_PER_USEC },
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{ "µs", NSEC_PER_USEC },
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{ "nsec", 1ULL },
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{ "ns", 1ULL },
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{ "", 1ULL }, /* default is nsec */
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{ "minute", NSEC_PER_MINUTE },
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{ "min", NSEC_PER_MINUTE },
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{ "months", NSEC_PER_MONTH },
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{ "month", NSEC_PER_MONTH },
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{ "M", NSEC_PER_MONTH },
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{ "msec", NSEC_PER_MSEC },
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{ "ms", NSEC_PER_MSEC },
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{ "m", NSEC_PER_MINUTE },
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{ "hours", NSEC_PER_HOUR },
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{ "hour", NSEC_PER_HOUR },
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{ "hr", NSEC_PER_HOUR },
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{ "h", NSEC_PER_HOUR },
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{ "days", NSEC_PER_DAY },
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{ "day", NSEC_PER_DAY },
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{ "d", NSEC_PER_DAY },
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{ "weeks", NSEC_PER_WEEK },
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{ "week", NSEC_PER_WEEK },
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{ "w", NSEC_PER_WEEK },
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{ "years", NSEC_PER_YEAR },
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{ "year", NSEC_PER_YEAR },
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{ "y", NSEC_PER_YEAR },
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{ "usec", NSEC_PER_USEC },
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{ "us", NSEC_PER_USEC },
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{ "µs", NSEC_PER_USEC },
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{ "nsec", 1ULL },
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{ "ns", 1ULL },
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{ "", 1ULL }, /* default is nsec */
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};
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size_t i;
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for (i = 0; i < ELEMENTSOF(table); i++) {
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char *e;
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e = startswith(p, table[i].suffix);
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if (e) {
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*multiplier = table[i].nsec;
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return e;
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}
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}
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return p;
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}
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int parse_nsec(const char *t, nsec_t *nsec) {
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const char *p, *s;
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nsec_t r = 0;
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bool something = false;
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@@ -1091,8 +1107,8 @@ int parse_nsec(const char *t, nsec_t *nsec) {
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}
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for (;;) {
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long long l, z = 0;
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size_t n = 0, i;
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nsec_t multiplier = 1, k;
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long long l;
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char *e;
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p += strspn(p, WHITESPACE);
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@@ -1104,7 +1120,7 @@ int parse_nsec(const char *t, nsec_t *nsec) {
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break;
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}
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if (*p == '-')
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if (*p == '-') /* Don't allow "-0" */
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return -ERANGE;
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errno = 0;
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@@ -1115,54 +1131,47 @@ int parse_nsec(const char *t, nsec_t *nsec) {
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return -ERANGE;
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if (*e == '.') {
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char *b = e + 1;
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if (IN_SET(*b, '-', '+') || isspace(*b))
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return -EINVAL;
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errno = 0;
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z = strtoll(b, &e, 10);
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if (errno > 0)
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return -errno;
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if (z < 0)
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return -ERANGE;
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if (e == b)
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return -EINVAL;
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n = e - b;
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p = e + 1;
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p += strspn(p, DIGITS);
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} else if (e == p)
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return -EINVAL;
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else
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p = e;
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e += strspn(e, WHITESPACE);
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s = extract_nsec_multiplier(p + strspn(p, WHITESPACE), &multiplier);
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if (s == p && *s != '\0')
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/* Don't allow '12.34.56', but accept '12.34 .56' or '12.34s.56'*/
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return -EINVAL;
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for (i = 0; i < ELEMENTSOF(table); i++)
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if (startswith(e, table[i].suffix)) {
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nsec_t k;
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p = s;
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k = ((nsec_t) -1) / table[i].nsec;
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if ((nsec_t) l + 1 >= k || (nsec_t) z >= k)
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return -ERANGE;
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if ((nsec_t) l >= NSEC_INFINITY / multiplier)
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return -ERANGE;
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k = (nsec_t) z * table[i].nsec;
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k = (nsec_t) l * multiplier;
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if (k >= NSEC_INFINITY - r)
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return -ERANGE;
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for (; n > 0; n--)
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k /= 10;
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r += k;
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k += (nsec_t) l * table[i].nsec;
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if (k >= ((nsec_t) -1) - r)
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something = true;
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if (*e == '.') {
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nsec_t m = multiplier / 10;
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const char *b;
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for (b = e + 1; *b >= '0' && *b <= '9'; b++, m /= 10) {
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k = (nsec_t) (*b - '0') * m;
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if (k >= NSEC_INFINITY - r)
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return -ERANGE;
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r += k;
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p = e + strlen(table[i].suffix);
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something = true;
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break;
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}
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if (i >= ELEMENTSOF(table))
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return -EINVAL;
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/* Don't allow "0.-0", "3.+1", "3. 1", "3.sec" or "3.hoge"*/
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if (b == e + 1)
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return -EINVAL;
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}
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}
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*nsec = r;
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