Added sendvile64() limit of 620756992 (0x25000000) bytes failed and did not continus if more)

src/imgsrv.c

@@ -39,6 +39,8 @@
 
 #include <sys/reboot.h>
 
+// sendfile64 failed at this size: //620756992='0x25000000'
+#define MAX_SENDFILE_SIZE 620756992
 
  // change to 0 when done
 #define ELPHEL_DEBUG 0
@@ -2152,7 +2154,7 @@ void listener_loop(struct file_set *fset)
     int tiff_bin_shift =   3; // histogram bin size is 1<<3 == 8
     int tiff_bin = 1;
     int tiff_auto = -1;
-    long long ssd_offs_byte, ssd_count_bytes, ssd_sent_bytes; //, ssd_set_byte;
+    long long ssd_offs_byte, ssd_count_bytes, ssd_sent_bytes, ssd_limited_count; //, ssd_set_byte;
     // imgsrv -p 2323 -s /dev/sda2
 
 //	  int    bin_shift,   // binsize = 1 << bin_shift
@@ -2244,7 +2246,9 @@ void listener_loop(struct file_set *fset)
 				//STDOUT_FILENO
 //ssize_t sendfile(int out_fd, int in_fd, off_t *offset, size_t count);
 				fprintf(stderr, "Sending %lld bytes, offs=%lld\n", ssd_count_bytes, ssd_offs_byte);
+
 #if 0
+				// not updated with MAX_SENDFILE_SIZE
 				ssd_offs_byte=lseek64(fset->ssd_fd, ssd_offs_byte, SEEK_SET);
 				fprintf(stderr, "lseek64()-> %lld, STDOUT_FILENO=%d, errno=%d\n", ssd_offs_byte, STDOUT_FILENO, errno);
 				while (ssd_count_bytes > 0) {
@@ -2260,8 +2264,13 @@ void listener_loop(struct file_set *fset)
 					ssd_count_bytes -= ssd_sent_bytes;
 				}
 #else
+				//MAX_SENDFILE_SIZE
 				while (ssd_count_bytes > 0) {
-					ssd_sent_bytes = sendfile64(STDOUT_FILENO, fset->ssd_fd, &ssd_offs_byte, ssd_count_bytes);
+					ssd_limited_count = ssd_count_bytes;
+					if (ssd_limited_count > MAX_SENDFILE_SIZE) {
+						ssd_limited_count = MAX_SENDFILE_SIZE;
+					}
+					ssd_sent_bytes = sendfile64(STDOUT_FILENO, fset->ssd_fd, &ssd_offs_byte, ssd_limited_count);
 					if (ssd_sent_bytes <= 0){
 						fprintf(stderr, "sendfile64() failed: sent %lld bytes (wanted %lld), offs=%lld, errno=%d\n", \
 								ssd_sent_bytes, ssd_count_bytes, ssd_offs_byte, errno);