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authorDan McGee <dan@archlinux.org>2011-08-08 18:18:09 -0500
committerDan McGee <dan@archlinux.org>2011-08-08 18:18:09 -0500
commit4885a7fa3a54e9a81831916c7925b2996b695f50 (patch)
treeaffcadfe972f4d50b5b50e6307b6de12e1737f42
parent67445334e71eaf6138561eee8e5561733a59fc69 (diff)
downloadpacman-4885a7fa3a54e9a81831916c7925b2996b695f50.tar.xz
Fix divide by zero when downloading zero length files
If someone did a 'touch bogusrepo.db', we had the potential to throw a SIGFPE or divide by zero, given that the total file size was 0 and getting passed up to the pacman callback. Fix this so we get weird but sane output and don't blow up when downloading: :: Synchronizing package databases... core 35.7K 306.7K/s 00:00:00 [###################] 100% bogusrepo 0.0K 0.0K/s 00:00:00 [###################] 100% Exception as seen in gdb: Program received signal SIGFPE, Arithmetic exception. 0x000000000040cc73 in cb_dl_progress (filename=0x619dfc "bogusrepo.db", file_xfered=0, file_total=0) at callback.c:584 584 file_percent = (file_xfered * 100) / file_total; Signed-off-by: Dan McGee <dan@archlinux.org>
-rw-r--r--src/pacman/callback.c25
1 files changed, 19 insertions, 6 deletions
diff --git a/src/pacman/callback.c b/src/pacman/callback.c
index 46ff2e88..68672b4f 100644
--- a/src/pacman/callback.c
+++ b/src/pacman/callback.c
@@ -27,6 +27,7 @@
#include <sys/types.h> /* off_t */
#include <unistd.h>
#include <wchar.h>
+#include <limits.h> /* UINT_MAX */
#include <alpm.h>
@@ -561,10 +562,13 @@ void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total)
diff_sec = current_time.tv_sec - initial_time.tv_sec;
diff_usec = current_time.tv_usec - initial_time.tv_usec;
timediff = diff_sec + (diff_usec / 1000000.0);
- rate = xfered / (timediff * 1024.0);
-
- /* round elapsed time to the nearest second */
- eta_s = (int)(timediff + 0.5);
+ if(timediff > 0.0) {
+ rate = xfered / (timediff * 1024.0);
+ /* round elapsed time to the nearest second */
+ eta_s = (unsigned int)(timediff + 0.5);
+ } else {
+ eta_s = 0;
+ }
} else {
/* compute current average values */
timediff = get_update_timediff(0);
@@ -576,12 +580,20 @@ void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total)
rate = (xfered - xfered_last) / (timediff * 1024.0);
/* average rate to reduce jumpiness */
rate = (rate + 2 * rate_last) / 3;
- eta_s = (total - xfered) / (rate * 1024.0);
+ if(rate > 0.0) {
+ eta_s = (total - xfered) / (rate * 1024.0);
+ } else {
+ eta_s = UINT_MAX;
+ }
rate_last = rate;
xfered_last = xfered;
}
- file_percent = (file_xfered * 100) / file_total;
+ if(file_total) {
+ file_percent = (file_xfered * 100) / file_total;
+ } else {
+ file_percent = 100;
+ }
if(totaldownload) {
total_percent = ((list_xfered + file_xfered) * 100) /
@@ -658,6 +670,7 @@ void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total)
}
/* 1 space + filenamelen + 1 space + 7 for size + 1 + 7 for rate + 2 for /s + 1 space + 8 for eta */
+ /* TODO: if eta_h > 99, formatting gets all messed up */
printf(" %ls%-*s %6.1f%c %#6.1f%c/s %02u:%02u:%02u", wcfname,
padwid, "", f_xfered, xfered_size,
rate, rate_size, eta_h, eta_m, eta_s);