Mercurial > hg > Members > masakoha > testcode
annotate c/mmap/main.cc @ 28:178cf2dfc45b
add make test
| author | Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Sun, 11 May 2014 18:14:02 +0900 |
| parents | 0f4ccdbaf57f |
| children | b9d005c23aaa |
| rev | line source |
|---|---|
| 3 | 1 #include <stdio.h> |
| 2 #include <stdlib.h> | |
|
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178cf2dfc45b
add make test
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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3 #include <string.h> |
| 3 | 4 #include <unistd.h> |
| 5 #include <fcntl.h> | |
| 6 #include <sys/stat.h> | |
| 7 #include <sys/types.h> | |
|
28
178cf2dfc45b
add make test
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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8 #include <sys/mman.h> |
| 3 | 9 |
| 10 | |
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28
178cf2dfc45b
add make test
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
26
diff
changeset
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11 const char *usr_help_str = "Usage : ./mmap [-file filename]"; |
| 3 | 12 |
| 13 int main(int argc, char *argv[]){ | |
| 14 | |
| 15 struct stat sb; | |
| 16 | |
| 17 char *filename = 0; | |
| 18 for (int i = 1; argv[i]; ++i) { | |
| 19 if (strcmp(argv[i], "-file") == 0){ | |
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178cf2dfc45b
add make test
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
26
diff
changeset
|
20 filename = argv[i+1]; i++; |
| 3 | 21 } |
| 22 } | |
| 23 | |
| 24 if (filename == 0){ | |
| 25 puts(usr_help_str); | |
| 26 exit(1); | |
| 27 } | |
| 28 | |
| 29 int fd = -1; | |
| 30 if ((fd=open(filename,O_RDONLY,0666))==0){ | |
| 31 fprintf(stderr,"can't open %s\n",filename); | |
| 32 } | |
| 33 | |
| 34 if (fstat(fd,&sb)){ | |
| 35 fprintf(stderr,"can't open %s\n",filename); | |
| 36 } | |
| 37 | |
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178cf2dfc45b
add make test
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
26
diff
changeset
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38 int text_size = sb.st_size; |
|
178cf2dfc45b
add make test
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
26
diff
changeset
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39 char *text = (char *)mmap(0, text_size, PROT_READ, MAP_PRIVATE, fd, 0); |
| 3 | 40 |
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28
178cf2dfc45b
add make test
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
26
diff
changeset
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41 printf("%s\n",text); |
| 3 | 42 |
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178cf2dfc45b
add make test
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
26
diff
changeset
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43 munmap(text, text_size); |
| 3 | 44 close(fd); |
| 45 | |
| 46 return 0; | |
| 47 } |