diff options
Diffstat (limited to 'src/examples/mcat.c')
| -rw-r--r-- | src/examples/mcat.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/examples/mcat.c b/src/examples/mcat.c new file mode 100644 index 0000000..7b39760 --- /dev/null +++ b/src/examples/mcat.c @@ -0,0 +1,45 @@ +/* mcat.c + + Prints files specified on command line to the console, using + mmap. */ + +#include <stdio.h> +#include <syscall.h> + +int +main (int argc, char *argv[]) +{ + int i; + + for (i = 1; i < argc; i++) + { + int fd; + mapid_t map; + void *data = (void *) 0x10000000; + int size; + + /* Open input file. */ + fd = open (argv[i]); + if (fd < 0) + { + printf ("%s: open failed\n", argv[i]); + return EXIT_FAILURE; + } + size = filesize (fd); + + /* Map files. */ + map = mmap (fd, data); + if (map == MAP_FAILED) + { + printf ("%s: mmap failed\n", argv[i]); + return EXIT_FAILURE; + } + + /* Write file to console. */ + write (STDOUT_FILENO, data, size); + + /* Unmap files (optional). */ + munmap (map); + } + return EXIT_SUCCESS; +} |
