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curlx: curlx_strcopy() instead of strcpy()

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This function REQUIRES the size of the target buffer as well as the
length of the source string. Meant to make it harder to do a bad
strcpy().

Removes 23 calls to strcpy().

Closes #20067
This commit is contained in:
Daniel Stenberg 2025-12-21 23:40:24 +01:00
parent f099c2ca55
commit a535be4ea0
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GPG key ID: 5CC908FDB71E12C2
30 changed files with 195 additions and 97 deletions
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54
lib/progress.c
View file

@ -30,6 +30,7 @@
#include "progress.h"
#include "transfer.h"
#include "curlx/timeval.h"
#include "curlx/strcopy.h"
/* check rate limits within this many recent milliseconds, at minimum. */
#define MIN_RATE_LIMIT_PERIOD 3000
@ -37,18 +38,18 @@
#ifndef CURL_DISABLE_PROGRESS_METER
/* Provide a string that is 2 + 1 + 2 + 1 + 2 = 8 letters long (plus the zero
byte) */
static void time2str(char *r, curl_off_t seconds)
static void time2str(char *r, size_t rsize, curl_off_t seconds)
{
curl_off_t h;
if(seconds <= 0) {
strcpy(r, "--:--:--");
curlx_strcopy(r, rsize, "--:--:--", 8);
return;
}
h = seconds / 3600;
if(h <= 99) {
curl_off_t m = (seconds - (h * 3600)) / 60;
curl_off_t s = (seconds - (h * 3600)) - (m * 60);
curl_msnprintf(r, 9, "%2" FMT_OFF_T ":%02" FMT_OFF_T ":%02" FMT_OFF_T,
curl_msnprintf(r, rsize, "%2" FMT_OFF_T ":%02" FMT_OFF_T ":%02" FMT_OFF_T,
h, m, s);
}
else {
@ -57,21 +58,21 @@ static void time2str(char *r, curl_off_t seconds)
curl_off_t d = seconds / 86400;
h = (seconds - (d * 86400)) / 3600;
if(d <= 999)
curl_msnprintf(r, 9, "%3" FMT_OFF_T "d %02" FMT_OFF_T "h", d, h);
curl_msnprintf(r, rsize, "%3" FMT_OFF_T "d %02" FMT_OFF_T "h", d, h);
else
curl_msnprintf(r, 9, "%7" FMT_OFF_T "d", d);
curl_msnprintf(r, rsize, "%7" FMT_OFF_T "d", d);
}
}
/* The point of this function would be to return a string of the input data,
but never longer than 6 columns (+ one zero byte).
Add suffix k, M, G when suitable... */
static char *max6data(curl_off_t bytes, char *max6)
static char *max6out(curl_off_t bytes, char *max6, size_t mlen)
{
/* a signed 64-bit value is 8192 petabytes maximum, shown as
8.0E (exabytes)*/
if(bytes < 100000)
curl_msnprintf(max6, 7, "%6" CURL_FORMAT_CURL_OFF_T, bytes);
curl_msnprintf(max6, mlen, "%6" CURL_FORMAT_CURL_OFF_T, bytes);
else {
const char unit[] = { 'k', 'M', 'G', 'T', 'P', 'E', 0 };
int k = 0;
@ -85,7 +86,7 @@ static char *max6data(curl_off_t bytes, char *max6)
DEBUGASSERT(unit[k]);
} while(unit[k]);
/* xxx.yU */
curl_msnprintf(max6, 7, "%3" CURL_FORMAT_CURL_OFF_T
curl_msnprintf(max6, mlen, "%3" CURL_FORMAT_CURL_OFF_T
".%" CURL_FORMAT_CURL_OFF_T "%c", nbytes,
(bytes % 1024) / (1024 / 10), unit[k]);
}
@ -528,9 +529,10 @@ static void progress_meter(struct Curl_easy *data)
/* Since both happen at the same time, total expected duration is max. */
total_estm.secs = CURLMAX(ul_estm.secs, dl_estm.secs);
/* create the three time strings */
time2str(time_left, total_estm.secs > 0 ? (total_estm.secs - cur_secs) : 0);
time2str(time_total, total_estm.secs);
time2str(time_spent, cur_secs);
time2str(time_left, sizeof(time_left),
total_estm.secs > 0 ? (total_estm.secs - cur_secs) : 0);
time2str(time_total, sizeof(time_total), total_estm.secs);
time2str(time_spent, sizeof(time_spent), cur_secs);
/* Get the total amount of data expected to get transferred */
total_expected_size = p->ul_size_known ? p->ul.total_size : p->ul.cur_size;
@ -554,18 +556,24 @@ static void progress_meter(struct Curl_easy *data)
"%3" FMT_OFF_T " %s "
"%3" FMT_OFF_T " %s "
"%3" FMT_OFF_T " %s %s %s %s %s %s %s",
total_estm.percent, /* 3 letters */ /* total % */
max6data(total_expected_size, max6[2]), /* total size */
dl_estm.percent, /* 3 letters */ /* rcvd % */
max6data(p->dl.cur_size, max6[0]), /* rcvd size */
ul_estm.percent, /* 3 letters */ /* xfer % */
max6data(p->ul.cur_size, max6[1]), /* xfer size */
max6data(p->dl.speed, max6[3]), /* avrg dl speed */
max6data(p->ul.speed, max6[4]), /* avrg ul speed */
time_total, /* 8 letters */ /* total time */
time_spent, /* 8 letters */ /* time spent */
time_left, /* 8 letters */ /* time left */
max6data(p->current_speed, max6[5])
total_estm.percent, /* 3 letters */ /* total % */
max6out(total_expected_size, max6[2],
sizeof(max6[2])), /* total size */
dl_estm.percent, /* 3 letters */ /* rcvd % */
max6out(p->dl.cur_size, max6[0],
sizeof(max6[0])), /* rcvd size */
ul_estm.percent, /* 3 letters */ /* xfer % */
max6out(p->ul.cur_size, max6[1],
sizeof(max6[1])), /* xfer size */
max6out(p->dl.speed, max6[3],
sizeof(max6[3])), /* avrg dl speed */
max6out(p->ul.speed, max6[4],
sizeof(max6[4])), /* avrg ul speed */
time_total, /* 8 letters */ /* total time */
time_spent, /* 8 letters */ /* time spent */
time_left, /* 8 letters */ /* time left */
max6out(p->current_speed, max6[5],
sizeof(max6[5])) /* current speed */
);
/* we flush the output stream to make it appear as soon as possible */