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 <stdio.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <string.h>
  #include <fcntl.h>
*** 105,118 ****
          for (d = 0; d < ndir; d++) {
                  (void) memset(dname, '\0', sizeof (dname));
                  (void) strcpy(dname, getfdname(pdir, TYPE_D, level, d, 0));
  
                  if (mkdir(dname, 0777) != 0) {
                          (void) fprintf(stderr, "mkdir(%s) failed."
                              "\n[%d]: %s.\n",
                              dname, errno, strerror(errno));
!                         exit(errno);
                  }
  
                  /*
                   * No sub-directory need be created, only create files in it.
                   */
--- 109,123 ----
          for (d = 0; d < ndir; d++) {
                  (void) memset(dname, '\0', sizeof (dname));
                  (void) strcpy(dname, getfdname(pdir, TYPE_D, level, d, 0));
  
                  if (mkdir(dname, 0777) != 0) {
+                         int exitcode = errno;
                          (void) fprintf(stderr, "mkdir(%s) failed."
                              "\n[%d]: %s.\n",
                              dname, errno, strerror(errno));
!                         exit(exitcode);
                  }
  
                  /*
                   * No sub-directory need be created, only create files in it.
                   */
*** 147,156 ****
--- 152,162 ----
  crtfile(char *pname)
  {
          int fd = -1;
          int afd = -1;
          int i, size;
+         int exitcode;
          char *context = "0123456789ABCDF";
          char *pbuf;
  
          if (pname == NULL) {
                  exit(1);
*** 162,190 ****
                  int offset = i * strlen(context);
                  (void) snprintf(pbuf+offset, size-offset, "%s", context);
          }
  
          if ((fd = open(pname, O_CREAT|O_RDWR, 0777)) < 0) {
                  (void) fprintf(stderr, "open(%s, O_CREAT|O_RDWR, 0777) failed."
                      "\n[%d]: %s.\n", pname, errno, strerror(errno));
!                 exit(errno);
          }
          if (write(fd, pbuf, 1024) < 1024) {
                  (void) fprintf(stderr, "write(fd, pbuf, 1024) failed."
                      "\n[%d]: %s.\n", errno, strerror(errno));
!                 exit(errno);
          }
  
          if ((afd = openat(fd, "xattr", O_CREAT | O_RDWR | O_XATTR, 0777)) < 0) {
                  (void) fprintf(stderr, "openat failed.\n[%d]: %s.\n",
                      errno, strerror(errno));
!                 exit(errno);
          }
          if (write(afd, pbuf, 1024) < 1024) {
                  (void) fprintf(stderr, "write(afd, pbuf, 1024) failed."
                      "\n[%d]: %s.\n", errno, strerror(errno));
!                 exit(errno);
          }
  
          (void) close(afd);
          (void) close(fd);
          free(pbuf);
--- 168,200 ----
                  int offset = i * strlen(context);
                  (void) snprintf(pbuf+offset, size-offset, "%s", context);
          }
  
          if ((fd = open(pname, O_CREAT|O_RDWR, 0777)) < 0) {
+                 exitcode = errno;
                  (void) fprintf(stderr, "open(%s, O_CREAT|O_RDWR, 0777) failed."
                      "\n[%d]: %s.\n", pname, errno, strerror(errno));
!                 exit(exitcode);
          }
          if (write(fd, pbuf, 1024) < 1024) {
+                 exitcode = errno;
                  (void) fprintf(stderr, "write(fd, pbuf, 1024) failed."
                      "\n[%d]: %s.\n", errno, strerror(errno));
!                 exit(exitcode);
          }
  
          if ((afd = openat(fd, "xattr", O_CREAT | O_RDWR | O_XATTR, 0777)) < 0) {
+                 exitcode = errno;
                  (void) fprintf(stderr, "openat failed.\n[%d]: %s.\n",
                      errno, strerror(errno));
!                 exit(exitcode);
          }
          if (write(afd, pbuf, 1024) < 1024) {
+                 exitcode = errno;
                  (void) fprintf(stderr, "write(afd, pbuf, 1024) failed."
                      "\n[%d]: %s.\n", errno, strerror(errno));
!                 exit(exitcode);
          }
  
          (void) close(afd);
          (void) close(fd);
          free(pbuf);