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getparam: make --rate accept "number of units"

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Do no more than 5 transfers per 15 seconds with "5/15s" or limit it to 3
transfers per 4 hours with "3/4h" etc.

Previously it would always only work with a single time unit.

Ref: #14242
Closes #14245
This commit is contained in:
Daniel Stenberg 2024-07-20 17:54:44 +02:00
parent 2d8464c4cb
commit b80798c24d
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2 changed files with 26 additions and 0 deletions
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22
src/tool_getparam.c
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@ -1244,6 +1244,20 @@ static ParameterError set_rate(struct GlobalConfig *global,
if(div) {
char unit = div[1];
curl_off_t numunits;
char *endp;
if(curlx_strtoofft(&div[1], &endp, 10, &numunits)) {
/* if it fails, there is no legit number specified */
if(endp == &div[1])
/* if endp did not move, accept it as a 1 */
numunits = 1;
else
return PARAM_BAD_USE;
}
else
unit = *endp;
switch(unit) {
case 's': /* per second */
numerator = 1000;
@ -1261,6 +1275,14 @@ static ParameterError set_rate(struct GlobalConfig *global,
err = PARAM_BAD_USE;
break;
}
if((LONG_MAX / numerator) < numunits) {
/* overflow, too large number */
errorf(global, "too large --rate unit");
err = PARAM_NUMBER_TOO_LARGE;
}
/* this typecast is okay based on the check above */
numerator *= (long)numunits;
}
if(err)