-c zero: assume zero counter value.

[tfcrypt.git] / tfc_random.c

diff --git a/tfc_random.c b/tfc_random.c
index 4b82aee99de018504f09a0686dd43afb1a24ab7e..03f9dad78339d5c5c66ad30fe8b6f455b992167b 100644 (file)
--- a/tfc_random.c
+++ b/tfc_random.c
@@ -44,7 +44,7 @@ static void get_urandom(const char *src, void *buf, size_t size)
        if (fd == -1) fd = open("/dev/random", O_RDONLY);
        if (fd == -1) xerror(NO, YES, YES, "random source is required (tried %s)", src);
 
-_again:        rd = read(fd, ubuf, sz);
+_again:        rd = xread(fd, ubuf, sz);
        if (rd < sz && rd != NOSIZE) {
                ubuf += rd;
                sz -= rd;
@@ -83,8 +83,10 @@ void tfc_getrandom(void *buf, size_t sz)
 
 void gen_write_bytes(const char *foutname, tfc_fsize offset, tfc_fsize nrbytes)
 {
+       static tfc_fsize wrpos = NOFSIZE;
        int fd, x;
-       size_t lblock;
+       size_t lblock, lio, lrem;
+       tfc_byte *pblk;
 
        for (x = 1; x < NSIG; x++) signal(x, SIG_IGN);
        memset(&sigact, 0, sizeof(sigact));
@@ -128,7 +130,7 @@ void gen_write_bytes(const char *foutname, tfc_fsize offset, tfc_fsize nrbytes)
 
        if (offset) {
                if (lseek(fd, offset, SEEK_SET) == -1)
-                       xerror(YES, NO, NO, "%s: seek failed", foutname);
+                       xerror(ignore_seek_errors, NO, NO, "%s: seek failed", foutname);
        }
 
        if (ctr_mode == TFC_MODE_PLAIN) memset(srcblk, 0, sizeof(srcblk));
@@ -140,13 +142,33 @@ void gen_write_bytes(const char *foutname, tfc_fsize offset, tfc_fsize nrbytes)
        do_stop = NO;
        while (1) {
                if (do_stop) break;
-               lblock = blk_len_adj(nrbytes, total_processed_src, sizeof(srcblk));
+               pblk = srcblk;
+               lblock = lrem = blk_len_adj(nrbytes, total_processed_src, blksize);
 
                if (ctr_mode != TFC_MODE_PLAIN) tfc_getrandom(srcblk, lblock);
 
-               if (write(fd, srcblk, lblock) == -1)
-                       xerror(NO, NO, YES, "%s", foutname);
+               if (error_action == TFC_ERRACT_SYNC) wrpos = tfc_fdgetpos(fd);
+_wagain:       lio = xwrite(fd, pblk, lrem);
+               if (lio == NOSIZE) {
+                       if (errno != EIO && catch_all_errors != YES)
+                               xerror(NO, NO, YES, "%s", foutname);
+                       switch (error_action) {
+                               case TFC_ERRACT_CONT: xerror(YES, NO, YES, "%s", foutname); goto _wagain; break;
+                               case TFC_ERRACT_SYNC:
+                               case TFC_ERRACT_LSYNC:
+                                       xerror(YES, NO, YES, "%s", foutname);
+                                       if (wrpos == NOFSIZE) lseek(fd, lblock, SEEK_CUR);
+                                       else lseek(fd, wrpos + lblock, SEEK_SET);
+                                       break;
+                               default: xerror(NO, NO, YES, "%s", foutname); break;
+                       }
+               }
                if (do_fsync && fsync(fd) == -1) xerror(NO, NO, YES, "%s", foutname);
+               if (lio < lrem) {
+                       pblk += lio;
+                       lrem -= lio;
+                       goto _wagain;
+               }
 
                total_processed_src += lblock;
                delta_processed += lblock;