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Replace all uses of sprintf with snprintf

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In all the cases where sprintf was being used within htop, snprintf
could have been used. This patch replaces all uses of sprintf with
snprintf which makes sure that if a buffer is too small to hold the
resulting string, the string is simply cut short instead of causing
a buffer overflow which leads to undefined behaviour.

`sizeof(variable)` was used in these cases, as opposed to `sizeof
variable` which is my personal preference because `sizeof(variable)`
was already used in one way or another in other parts of the code.
This commit is contained in:
Tomasz Kramkowski
2016-12-29 19:42:41 +01:00
parent 8af4d9f453
commit 2b5c1b4b13
6 changed files with 25 additions and 25 deletions
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6
UptimeMeter.c
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@ -33,11 +33,11 @@ static void UptimeMeter_updateValues(Meter* this, char* buffer, int len) {
}
char daysbuf[15];
if (days > 100) {
sprintf(daysbuf, "%d days(!), ", days);
snprintf(daysbuf, sizeof(daysbuf), "%d days(!), ", days);
} else if (days > 1) {
sprintf(daysbuf, "%d days, ", days);
snprintf(daysbuf, sizeof(daysbuf), "%d days, ", days);
} else if (days == 1) {
sprintf(daysbuf, "1 day, ");
snprintf(daysbuf, sizeof(daysbuf), "1 day, ");
} else {
daysbuf[0] = '\0';
}