v42.

We trigger redownloads from the server if the timestamp of
downloaded tar files is too new. An easy way around this issue
is to request the timestamp from the server instead of using
the download time. A `touch` of the tar then assures that
the downloaded file has the same timestamp as the server has.

configure.ac

@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.66])
-AC_INIT(clr-debug-info, 38, arjan@linux.intel.com)
+AC_INIT(clr-debug-info, 42, arjan@linux.intel.com)
 AM_INIT_AUTOMAKE([foreign -Wall -W subdir-objects])
 AM_SILENT_RULES([yes])
 AC_PROG_CC

src/server.c

@@ -162,6 +162,7 @@ static int curl_get_file(const char *url, const char *prefix, time_t timestamp)
 {
         CURLcode code;
         long ret;
+        long changed;
         int fd;
         char filename[PATH_MAX];
         CURL *curl = NULL;
@@ -203,6 +204,9 @@ static int curl_get_file(const char *url, const char *prefix, time_t timestamp)
         curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 30);
         curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 1024);
 
+        /* request timestamp of files from server */
+        curl_easy_setopt(curl, CURLOPT_FILETIME, 1);
+
         if (timestamp) {
                 curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
                 curl_easy_setopt(curl, CURLOPT_TIMEVALUE, timestamp);
@@ -230,6 +234,17 @@ static int curl_get_file(const char *url, const char *prefix, time_t timestamp)
         }
 
         if (ret == 200) {
+                /* get timestamp, if any */
+                curl_easy_getinfo(curl, CURLINFO_FILETIME, &changed);
+                if (changed >= 0) {
+                        struct timespec times[2];
+                        times[0].tv_sec = (time_t)changed;
+                        times[0].tv_nsec = 0;
+                        times[1].tv_sec = (time_t)changed;
+                        times[1].tv_nsec = 0;
+                        futimens(fd, times);
+                }
+
                 autofree(char) *command = NULL;
                 //		printf("Filename is %s\n", filename);