| /* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd |
| See the file COPYING for copying permission. |
| */ |
| |
| #include <sys/types.h> |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| |
| #ifndef MAP_FILE |
| #define MAP_FILE 0 |
| #endif |
| |
| #include "filemap.h" |
| |
| int |
| filemap(const char *name, |
| void (*processor)(const void *, size_t, const char *, void *arg), |
| void *arg) |
| { |
| int fd; |
| size_t nbytes; |
| struct stat sb; |
| void *p; |
| |
| fd = open(name, O_RDONLY); |
| if (fd < 0) { |
| perror(name); |
| return 0; |
| } |
| if (fstat(fd, &sb) < 0) { |
| perror(name); |
| close(fd); |
| return 0; |
| } |
| if (!S_ISREG(sb.st_mode)) { |
| close(fd); |
| fprintf(stderr, "%s: not a regular file\n", name); |
| return 0; |
| } |
| |
| nbytes = sb.st_size; |
| /* mmap fails for zero length files */ |
| if (nbytes == 0) { |
| static const char c = '\0'; |
| processor(&c, 0, name, arg); |
| close(fd); |
| return 1; |
| } |
| p = (void *)mmap((caddr_t)0, (size_t)nbytes, PROT_READ, |
| MAP_FILE|MAP_PRIVATE, fd, (off_t)0); |
| if (p == (void *)-1) { |
| perror(name); |
| close(fd); |
| return 0; |
| } |
| processor(p, nbytes, name, arg); |
| munmap((caddr_t)p, nbytes); |
| close(fd); |
| return 1; |
| } |