Last change
on this file since 337 was 337, checked in by coas-nagasima, 6 years ago |
ASP3版ECNLを追加
|
-
Property svn:eol-style
set to
native
-
Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
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File size:
992 bytes
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Rev | Line | |
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[337] | 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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