15291 zfs-tests errno flaws exposed by 15220

*** 22,31 ****
--- 22,35 ----
  /*
   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
+ /*
+  * Copyright 2022 MNX Cloud, Inc.
+  */
+ 
  #include "../file_common.h"
  #include <libgen.h>
  
  static unsigned char bigbuffer[BIGBUFFERSIZE];
  
*** 57,66 ****
--- 61,71 ----
          char            *operation = NULL;
          offset_t        noffset, offset = 0;
          int             verbose = 0;
          int             rsync = 0;
          int             wsync = 0;
+         int             exitcode;
  
          /*
           * Process Arguments
           */
          while ((c = getopt(argc, argv, "b:c:d:s:f:o:vwr")) != -1) {
*** 164,182 ****
          /*
           * Given an operation (create/overwrite/append), open the file
           * accordingly and perform a write of the appropriate type.
           */
          if ((bigfd = open(filename, oflag, 0666)) == -1) {
                  (void) printf("open %s: failed [%s]%d. Aborting!\n", filename,
                      strerror(errno), errno);
!                 exit(errno);
          }
          noffset = llseek(bigfd, offset, SEEK_SET);
          if (noffset != offset) {
                  (void) printf("llseek %s (%lld/%lld) failed [%s]%d.Aborting!\n",
                      filename, offset, noffset, strerror(errno), errno);
!                 exit(errno);
          }
  
          if (verbose) {
                  (void) printf("%s: block_size = %d, write_count = %d, "
                      "offset = %lld, data = %s%d\n", filename, block_size,
--- 169,189 ----
          /*
           * Given an operation (create/overwrite/append), open the file
           * accordingly and perform a write of the appropriate type.
           */
          if ((bigfd = open(filename, oflag, 0666)) == -1) {
+                 exitcode = errno;
                  (void) printf("open %s: failed [%s]%d. Aborting!\n", filename,
                      strerror(errno), errno);
!                 exit(exitcode);
          }
          noffset = llseek(bigfd, offset, SEEK_SET);
          if (noffset != offset) {
+                 exitcode = errno;
                  (void) printf("llseek %s (%lld/%lld) failed [%s]%d.Aborting!\n",
                      filename, offset, noffset, strerror(errno), errno);
!                 exit(exitcode);
          }
  
          if (verbose) {
                  (void) printf("%s: block_size = %d, write_count = %d, "
                      "offset = %lld, data = %s%d\n", filename, block_size,
*** 187,201 ****
  
          for (i = 0; i < write_count; i++) {
                  ssize_t n;
  
                  if ((n = write(bigfd, &bigbuffer, block_size)) == -1) {
                          (void) printf("write failed (%ld), good_writes = %lld, "
                              "error: %s[%d]\n", (long)n, good_writes,
                              strerror(errno),
                              errno);
!                         exit(errno);
                  }
                  good_writes++;
          }
  
          if (verbose) {
--- 194,209 ----
  
          for (i = 0; i < write_count; i++) {
                  ssize_t n;
  
                  if ((n = write(bigfd, &bigbuffer, block_size)) == -1) {
+                         exitcode = errno;
                          (void) printf("write failed (%ld), good_writes = %lld, "
                              "error: %s[%d]\n", (long)n, good_writes,
                              strerror(errno),
                              errno);
!                         exit(exitcode);
                  }
                  good_writes++;
          }
  
          if (verbose) {