diff options
Diffstat (limited to 'examples/mcat.c')
| -rw-r--r-- | examples/mcat.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/examples/mcat.c b/examples/mcat.c new file mode 100644 index 0000000..7b39760 --- /dev/null +++ b/examples/mcat.c | |||
| @@ -0,0 +1,45 @@ | |||
| 1 | /* mcat.c | ||
| 2 | |||
| 3 | Prints files specified on command line to the console, using | ||
| 4 | mmap. */ | ||
| 5 | |||
| 6 | #include <stdio.h> | ||
| 7 | #include <syscall.h> | ||
| 8 | |||
| 9 | int | ||
| 10 | main (int argc, char *argv[]) | ||
| 11 | { | ||
| 12 | int i; | ||
| 13 | |||
| 14 | for (i = 1; i < argc; i++) | ||
| 15 | { | ||
| 16 | int fd; | ||
| 17 | mapid_t map; | ||
| 18 | void *data = (void *) 0x10000000; | ||
| 19 | int size; | ||
| 20 | |||
| 21 | /* Open input file. */ | ||
| 22 | fd = open (argv[i]); | ||
| 23 | if (fd < 0) | ||
| 24 | { | ||
| 25 | printf ("%s: open failed\n", argv[i]); | ||
| 26 | return EXIT_FAILURE; | ||
| 27 | } | ||
| 28 | size = filesize (fd); | ||
| 29 | |||
| 30 | /* Map files. */ | ||
| 31 | map = mmap (fd, data); | ||
| 32 | if (map == MAP_FAILED) | ||
| 33 | { | ||
| 34 | printf ("%s: mmap failed\n", argv[i]); | ||
| 35 | return EXIT_FAILURE; | ||
| 36 | } | ||
| 37 | |||
| 38 | /* Write file to console. */ | ||
| 39 | write (STDOUT_FILENO, data, size); | ||
| 40 | |||
| 41 | /* Unmap files (optional). */ | ||
| 42 | munmap (map); | ||
| 43 | } | ||
| 44 | return EXIT_SUCCESS; | ||
| 45 | } | ||
