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:
578 bytes
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Line | |
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1 | #include <unistd.h>
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2 | #include <fcntl.h>
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3 | #include <errno.h>
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4 | #include "libc.h"
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5 |
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6 | int lockf(int fd, int op, off_t size)
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7 | {
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8 | struct flock l = {
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9 | .l_type = F_WRLCK,
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10 | .l_whence = SEEK_CUR,
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11 | .l_len = size,
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12 | };
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13 | switch (op) {
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14 | case F_TEST:
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15 | l.l_type = F_RDLCK;
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16 | if (fcntl(fd, F_GETLK, &l) < 0)
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17 | return -1;
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18 | if (l.l_type == F_UNLCK || l.l_pid == getpid())
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19 | return 0;
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20 | errno = EACCES;
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21 | return -1;
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22 | case F_ULOCK:
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23 | l.l_type = F_UNLCK;
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24 | case F_TLOCK:
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25 | return fcntl(fd, F_SETLK, &l);
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26 | case F_LOCK:
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27 | return fcntl(fd, F_SETLKW, &l);
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28 | }
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29 | errno = EINVAL;
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30 | return -1;
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31 | }
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32 |
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33 | LFS64(lockf);
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