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char buf[1024];
FILE *fptrfile;
/* fptr initialized to someInitialized file */

if (fgets(buf, 1024, fptrfile) == NULL) {
  /* set error flag and continue */
}
printf("Read in: %s\n", buf);

char buf[1024];
FILE *fptrfile;
/* fptr initialized to someInitialized file */

if (fgets(buf, 1024, fptrfile) == NULL) {
  /* set error flag and continue */
  strcpy(buf, "fgets failed");
}
printf("Read in: %s\n", buf);