Merge pull request #77 from thnkslprpt/fix-76-replace-exit-1-with-EXI…

…T_FAILURE

Fix #76, Replace exit(1) with preferred macro EXIT_FAILURE

cfe_ts_crc.c

@@ -114,7 +114,7 @@ int main(int argc, char **argv)
  {
  printf("%s\n", CFE_TS_CRC_VERSION_STRING);
  printf("\nUsage: cfe_ts_crc [filename]\n");
- exit(1);
+ exit(EXIT_FAILURE);
  }
  /* Set to skip the header (116 bytes) */
  skipSize = sizeof(CFE_FS_Header_t) + sizeof(CFE_TBL_File_Hdr_t);
@@ -125,15 +125,15 @@ int main(int argc, char **argv)
  {
  printf("\ncfe_ts_crc error: can't open input file!\n");
  perror(argv[1]);
- exit(1);
+ exit(EXIT_FAILURE);
  }
  /* seek past the number of bytes requested */
  offsetReturn = lseek(fd, skipSize, SEEK_SET);
  if (offsetReturn != skipSize)
  {
  printf("\ncfe_ts_crc error: lseek failed!\n");
  printf("%s\n", strerror(errno));
- exit(1);
+ exit(EXIT_FAILURE);
  }
 
  /* read the input file 100 bytes at a time */
@@ -144,7 +144,7 @@ int main(int argc, char **argv)
  {
  printf("\ncfe_ts_crc error: file read failed!\n");
  printf("%s\n", strerror(errno));
- exit(1);
+ exit(EXIT_FAILURE);
  }
  fileCRC = CalculateCRC(buffer, readSize, fileCRC);
  fileSize += readSize;
@@ -160,7 +160,7 @@ int main(int argc, char **argv)
  {
  printf("\nerror: Cannot close file!\n");
  printf("%s\n", strerror(errno));
- exit(1);
+ exit(EXIT_FAILURE);
  }
 
  return 0;