check_openpf5.c (955B)
1 /* Check that TRT happens when error on too many opened files. 2 #notarget: cris*-*-elf 3 #sim: --sysroot=@exedir@ 4 */ 5 #include <stddef.h> 6 #include <stdlib.h> 7 #include <stdio.h> 8 #include <unistd.h> 9 #include <errno.h> 10 #include <limits.h> 11 #include <sys/types.h> 12 #include <sys/stat.h> 13 #include <fcntl.h> 14 #include <string.h> 15 16 int main (int argc, char *argv[]) 17 { 18 int i; 19 int filemax; 20 21 #ifdef OPEN_MAX 22 filemax = OPEN_MAX; 23 #else 24 filemax = sysconf (_SC_OPEN_MAX); 25 #endif 26 27 char *fn = malloc (strlen (argv[0]) + 2); 28 if (fn == NULL) 29 abort (); 30 strcpy (fn, "/"); 31 strcat (fn, argv[0]); 32 33 for (i = 0; i < filemax + 1; i++) 34 { 35 if (open (fn, O_RDONLY) < 0) 36 { 37 /* Shouldn't happen too early. */ 38 if (i < filemax - 3 - 1) 39 { 40 fprintf (stderr, "i: %d\n", i); 41 abort (); 42 } 43 if (errno != EMFILE) 44 { 45 perror ("open"); 46 abort (); 47 } 48 goto ok; 49 } 50 } 51 abort (); 52 53 ok: 54 printf ("pass\n"); 55 exit (0); 56 }