46 lines
855 B
C
Executable File
46 lines
855 B
C
Executable File
/* mcat.c
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Prints files specified on command line to the console, using
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mmap. */
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#include <stdio.h>
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#include <syscall.h>
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int
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main (int argc, char *argv[])
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{
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int i;
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for (i = 1; i < argc; i++)
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{
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int fd;
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mapid_t map;
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void *data = (void *) 0x10000000;
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int size;
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/* Open input file. */
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fd = open (argv[i]);
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if (fd < 0)
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{
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printf ("%s: open failed\n", argv[i]);
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return EXIT_FAILURE;
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}
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size = filesize (fd);
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/* Map files. */
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map = mmap (fd, data);
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if (map == MAP_FAILED)
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{
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printf ("%s: mmap failed\n", argv[i]);
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return EXIT_FAILURE;
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}
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/* Write file to console. */
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write (STDOUT_FILENO, data, size);
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/* Unmap files (optional). */
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munmap (map);
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}
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return EXIT_SUCCESS;
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}
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