Last change
on this file since 445 was 444, checked in by coas-nagasima, 4 years ago |
muslのソースコードを追加
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Property svn:eol-style
set to
native
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Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
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File size:
992 bytes
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1 | #include <sys/mman.h>
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2 | #include <errno.h>
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3 | #include <fcntl.h>
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4 | #include <unistd.h>
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5 | #include <string.h>
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6 | #include <limits.h>
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7 | #include <pthread.h>
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8 |
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9 | char *__strchrnul(const char *, int);
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10 |
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11 | char *__shm_mapname(const char *name, char *buf)
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12 | {
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13 | char *p;
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14 | while (*name == '/') name++;
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15 | if (*(p = __strchrnul(name, '/')) || p==name ||
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16 | (p-name <= 2 && name[0]=='.' && p[-1]=='.')) {
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17 | errno = EINVAL;
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18 | return 0;
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19 | }
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20 | if (p-name > NAME_MAX) {
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21 | errno = ENAMETOOLONG;
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22 | return 0;
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23 | }
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24 | memcpy(buf, "/dev/shm/", 9);
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25 | memcpy(buf+9, name, p-name+1);
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26 | return buf;
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27 | }
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28 |
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29 | int shm_open(const char *name, int flag, mode_t mode)
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30 | {
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31 | int cs;
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32 | char buf[NAME_MAX+10];
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33 | if (!(name = __shm_mapname(name, buf))) return -1;
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34 | pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
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35 | int fd = open(name, flag|O_NOFOLLOW|O_CLOEXEC|O_NONBLOCK, mode);
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36 | pthread_setcancelstate(cs, 0);
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37 | return fd;
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38 | }
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39 |
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40 | int shm_unlink(const char *name)
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41 | {
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42 | char buf[NAME_MAX+10];
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43 | if (!(name = __shm_mapname(name, buf))) return -1;
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44 | return unlink(name);
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45 | }
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