1 /* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd

     2    See the file COPYING for copying permission.

     3 */

     4 

     5 #include <sys/types.h>

     6 #include <sys/mman.h>

     7 #include <sys/stat.h>

     8 #include <fcntl.h>

     9 #include <errno.h>

    10 #include <string.h>

    11 #include <stdio.h>

    12 #include <unistd.h>

    13 

    14 #ifndef MAP_FILE

    15 #define MAP_FILE 0

    16 #endif

    17 

    18 #include "filemap.h"

    19 

    20 int

    21 filemap(const char *name,

    22         void (*processor)(const void *, size_t, const char *, void *arg),

    23         void *arg)

    24 {

    25   int fd;

    26   size_t nbytes;

    27   struct stat sb;

    28   void *p;

    29 

    30   fd = open(name, O_RDONLY);

    31   if (fd < 0) {

    32     perror(name);

    33     return 0;

    34   }

    35   if (fstat(fd, &sb) < 0) {

    36     perror(name);

    37     close(fd);

    38     return 0;

    39   }

    40   if (!S_ISREG(sb.st_mode)) {

    41     close(fd);

    42     fprintf(stderr, "%s: not a regular file\n", name);

    43     return 0;

    44   }

    45 

    46   nbytes = sb.st_size;

    47   p = (void *)mmap((caddr_t)0, (size_t)nbytes, PROT_READ,

    48                    MAP_FILE|MAP_PRIVATE, fd, (off_t)0);

    49   if (p == (void *)-1) {

    50     perror(name);

    51     close(fd);

    52     return 0;

    53   }

    54   processor(p, nbytes, name, arg);

    55   munmap((caddr_t)p, nbytes);

    56   close(fd);

    57   return 1;

    58 }