granicus.if.org Git - strace/blob - tests/xstatfsx.c

   1 /*
   2  * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
   3  * Copyright (c) 2016-2018 The strace developers.
   4  * All rights reserved.
   5  *
   6  * SPDX-License-Identifier: GPL-2.0-or-later
   7  */
   8
   9 #include <stdio.h>
  10 #include <fcntl.h>
  11 #include <unistd.h>
  12
  13 #include <linux/types.h>
  14 #include <asm/statfs.h>
  15
  16 #include "xlat.h"
  17 #include "xlat/fsmagic.h"
  18 #include "xlat/statfs_flags.h"
  19
  20 #define PRINT_NUM(arg)                                                  \
  21         do {                                                            \
  22                 if (sizeof(b->arg) == sizeof(int))                      \
  23                         printf(", %s=%u", #arg,                         \
  24                                (unsigned int) b->arg);                  \
  25                 else if (sizeof(b->arg) == sizeof(long))                \
  26                         printf(", %s=%lu", #arg,                        \
  27                                (unsigned long) b->arg);                 \
  28                 else                                                    \
  29                         printf(", %s=%llu", #arg,                       \
  30                                (unsigned long long) b->arg);            \
  31         } while (0)
  32
  33 static void
  34 print_statfs_type(const char *const prefix, const unsigned int magic)
  35 {
  36         fputs(prefix, stdout);
  37         unsigned int i;
  38         for (i = 0; i < ARRAY_SIZE(fsmagic); ++i)
  39                 if (magic == fsmagic[i].val) {
  40                         fputs(fsmagic[i].str, stdout);
  41                         return;
  42                 }
  43         printf("%#x", magic);
  44 }
  45
  46 static void
  47 print_statfs(const char *const sample, const char *magic_str)
  48 {
  49         int fd = open(sample, O_RDONLY);
  50         if (fd < 0)
  51                 perror_msg_and_skip("open: %s", sample);
  52
  53         TAIL_ALLOC_OBJECT_CONST_PTR(STRUCT_STATFS, b);
  54         long rc = SYSCALL_INVOKE(sample, fd, b, sizeof(*b));
  55         if (rc)
  56                 perror_msg_and_skip(SYSCALL_NAME);
  57
  58         PRINT_SYSCALL_HEADER(sample, fd, sizeof(*b));
  59         if (magic_str)
  60                 printf("{f_type=%s", magic_str);
  61         else
  62                 print_statfs_type("{f_type=", b->f_type);
  63         PRINT_NUM(f_bsize);
  64         PRINT_NUM(f_blocks);
  65         PRINT_NUM(f_bfree);
  66         PRINT_NUM(f_bavail);
  67         PRINT_NUM(f_files);
  68         PRINT_NUM(f_ffree);
  69 #ifdef PRINT_F_FSID
  70         printf(", f_fsid={val=[%u, %u]}",
  71                (unsigned) b->PRINT_F_FSID[0], (unsigned) b->PRINT_F_FSID[1]);
  72 #endif
  73         PRINT_NUM(f_namelen);
  74 #ifdef PRINT_F_FRSIZE
  75         PRINT_NUM(f_frsize);
  76 #endif
  77 #ifdef PRINT_F_FLAGS
  78         if (b->f_flags & ST_VALID) {
  79                 printf(", f_flags=");
  80                 printflags(statfs_flags, b->f_flags, "ST_???");
  81         }
  82 #endif
  83         printf("}) = 0\n");
  84 }
  85
  86 int
  87 main(void)
  88 {
  89         print_statfs("/proc/self/status", "PROC_SUPER_MAGIC");
  90
  91         print_statfs(".", NULL);
  92
  93         long rc = SYSCALL_INVOKE("", -1, 0, sizeof(STRUCT_STATFS));
  94         const char *errstr = sprintrc(rc);
  95         PRINT_SYSCALL_HEADER("", -1, sizeof(STRUCT_STATFS));
  96         printf("NULL) = %s\n", errstr);
  97
  98 #ifdef CHECK_ODD_SIZE
  99         const unsigned long addr = (unsigned long) 0xfacefeeddeadbeefULL;
 100         rc = SYSCALL_INVOKE("", -1, addr, sizeof(STRUCT_STATFS) + 1);
 101         errstr = sprintrc(rc);
 102         PRINT_SYSCALL_HEADER("", -1, sizeof(STRUCT_STATFS) + 1);
 103         printf("%#lx) = %s\n", addr, errstr);
 104 #endif
 105
 106         puts("+++ exited with 0 +++");
 107         return 0;
 108 }