mkfifo失败，看错误代码看不了，什么原因。

JackStephie

1. #include <stdio.h>
   
2. #include <stdlib.h>
   
3. #include <string.h>
   
4. #include <fcntl.h>
   
5. #include <limits.h>
   
6. #include <sys/types.h>
   
7. #include <sys/stat.h>
   
8. #include <unistd.h>
   
9. #include <errno.h>
   
10. 
    
11. #define FIFO_NAME "/home/hello/tmp/my_fifo"
    
12. 
    
13. int main()
    
14. {
    
15.     int pipe_fd;
    
16.     //printf("EACCESS:%d",EACCESS);
    
17.     //printf("EEXIST:%d",EEXIST);
    
18.     //printf("ENAMETOOLONG:%d",ENAMETOOLONG);
    
19.     //printf("ENOENT:%d",ENOENT);
    
20.     //printf("ENOSPC:%d",ENOSPC);
    
21.     //printf("ENOTDIR:%d",ENOTDIR);
    
22.     //printf("EROFS:%d",EROFS);
    
23.    
    
24.     //if the pipe file do not exist
    
25.     if (access(FIFO_NAME, F_OK) == -1)
    
26.     {
    
27.         //creat FIFO pipe file
    
28.         int ret = mkfifo(FIFO_NAME, 0777);
    
29.         if(ret == -1)
    
30.         {
    
31.                                 puts("创建管道失败");
    
32.                                 printf("errno:%d\n",errno);
    
33.                 }
    
34.     }

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编译失败  错误： ‘EACCESS’在此作用域中尚未声明

JackStephie

1. /usr/src/linux-headers-3.2.0-57/arch/s390/include/asm/errno.h
   
2. /usr/src/linux-headers-3.2.0-57/arch/alpha/include/asm/errno.h
   
3. /usr/src/linux-headers-3.2.0-57/arch/avr32/include/asm/errno.h
   
4. /usr/src/linux-headers-3.2.0-57/arch/score/include/asm/errno.h
   
5. /usr/src/linux-headers-3.2.0-57/arch/xtensa/include/asm/errno.h
   
6. /usr/src/linux-headers-3.2.0-57/arch/frv/include/asm/errno.h
   
7. /usr/src/linux-headers-3.2.0-57/arch/arm/mach-bcmring/include/csp/errno.h
   
8. /usr/src/linux-headers-3.2.0-57/arch/h8300/include/asm/errno.h
   
9. /usr/src/linux-headers-3.2.0-57/arch/m32r/include/asm/errno.h
   
10. /usr/src/linux-headers-3.2.0-57/arch/microblaze/include/asm/errno.h
    
11. /usr/src/linux-headers-3.2.0-57/arch/x86/include/asm/errno.h
    
12. /usr/src/linux-headers-3.2.0-57/arch/m68k/include/asm/errno.h
    
13. /usr/src/linux-headers-3.2.0-57/arch/ia64/include/asm/errno.h
    
14. /usr/src/linux-headers-3.2.0-57/arch/cris/include/asm/errno.h
    
15. /usr/src/linux-headers-3.2.0-57/arch/powerpc/include/asm/errno.h
    
16. /usr/src/linux-headers-3.2.0-57/arch/mn10300/include/asm/errno.h
    
17. /usr/src/linux-headers-3.2.0-57/arch/sh/include/asm/errno.h
    
18. /usr/src/linux-headers-3.2.0-57/arch/parisc/include/asm/errno.h
    
19. /usr/src/linux-headers-3.2.0-57/arch/sparc/include/asm/errno.h
    
20. /usr/src/linux-headers-3.2.0-57/arch/mips/include/asm/errno.h
    
21. /usr/src/linux-headers-3.2.0-57/include/linux/errno.h
    
22. /usr/src/linux-headers-3.2.0-57/include/asm-generic/errno.h
    
23. /usr/src/linux-headers-3.2.0-30/arch/s390/include/asm/errno.h
    
24. /usr/src/linux-headers-3.2.0-30/arch/alpha/include/asm/errno.h
    
25. /usr/src/linux-headers-3.2.0-30/arch/avr32/include/asm/errno.h
    
26. /usr/src/linux-headers-3.2.0-30/arch/score/include/asm/errno.h
    
27. /usr/src/linux-headers-3.2.0-30/arch/xtensa/include/asm/errno.h
    
28. /usr/src/linux-headers-3.2.0-30/arch/frv/include/asm/errno.h
    
29. /usr/src/linux-headers-3.2.0-30/arch/arm/mach-bcmring/include/csp/errno.h
    
30. /usr/src/linux-headers-3.2.0-30/arch/h8300/include/asm/errno.h
    
31. /usr/src/linux-headers-3.2.0-30/arch/m32r/include/asm/errno.h
    
32. /usr/src/linux-headers-3.2.0-30/arch/microblaze/include/asm/errno.h
    
33. /usr/src/linux-headers-3.2.0-30/arch/x86/include/asm/errno.h
    
34. /usr/src/linux-headers-3.2.0-30/arch/m68k/include/asm/errno.h
    
35. /usr/src/linux-headers-3.2.0-30/arch/ia64/include/asm/errno.h
    
36. /usr/src/linux-headers-3.2.0-30/arch/cris/include/asm/errno.h
    
37. /usr/src/linux-headers-3.2.0-30/arch/powerpc/include/asm/errno.h
    
38. /usr/src/linux-headers-3.2.0-30/arch/mn10300/include/asm/errno.h
    
39. /usr/src/linux-headers-3.2.0-30/arch/sh/include/asm/errno.h
    
40. /usr/src/linux-headers-3.2.0-30/arch/parisc/include/asm/errno.h
    
41. /usr/src/linux-headers-3.2.0-30/arch/sparc/include/asm/errno.h
    
42. /usr/src/linux-headers-3.2.0-30/arch/mips/include/asm/errno.h
    
43. /usr/src/linux-headers-3.2.0-30/include/linux/errno.h
    
44. /usr/src/linux-headers-3.2.0-30/include/asm-generic/errno.h
    
45. /usr/src/linux-headers-3.2.0-30-generic/include/linux/errno.h
    
46. /usr/src/linux-headers-3.2.0-57-generic/include/linux/errno.h
    
47. /usr/lib/syslinux/com32/include/errno.h
    
48. /usr/include/errno.h
    
49. /usr/include/linux/errno.h
    
50. /usr/include/x86_64-linux-gnu/asm/errno.h
    
51. /usr/include/x86_64-linux-gnu/sys/errno.h
    
52. /usr/include/x86_64-linux-gnu/bits/errno.h
    
53. /usr/include/asm-generic/errno.h
    

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挑了几个看了下头文件，好像没有定义的啊。？