Linux 拷贝文件函数：不知道这个对不对，转载了再说

Linux 拷贝文件函数

2007-12-17 10:56

1 /* 2 * Copy a (real) file to another (real) file. 3 * file can be a regular file or a simlink 4 */ 5 int create_copy_file(const char *source, const char *target) 6 { 7         struct stat src_stat; 8 9         if (lstat(source, &src_stat) == -1) 10                 return -1; 11 12         if (S_ISLNK(src_stat.st_mode)) { 13                 char lnk[1024]; 14                 int lnk_size; 15                 if ((lnk_size = readlink(source, lnk, 1023)) == -1) 16                         return -2; 17                 lnk[lnk_size] = '\0'; 18                 if (symlink(lnk, target) == -1) 19                         return -3; 20         } else if (S_ISREG(src_stat.st_mode)) { 21                 int src, dst; 22                 int rsize; 23                 char buf[1024]; 24                 if ((src = open(source, O_RDONLY)) == -1) { 25                         close(dst); 26                         return -4; 27                 } 28                 if ((dst = creat(target, src_stat.st_mode)) == -1) 29                         return -5; 30                 while ((rsize = read(src, buf, 1024))) { 31                         if (rsize == -1 && errno == EINTR) 32                                 continue ; 33                         if (rsize == -1) { 34                                 close(src); 35                                 close(dst); 36                                 return -6; 37                         } 38                         while (write(dst, buf, rsize) == -1) 39                                 if (errno != EINTR) { 40                                 close(src); 41                                 close(dst); 42                                 return -7; 43                         } 44                 } 45                 close(src); 46                 close(dst); 47         } else { 48                 return -8; 49         } 50         return 0; 51 }