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2000-03-09

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@637 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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matz 2000-03-09 09:04:36 +00:00
parent 5728ed4f51
commit 976692f8ae
8 changed files with 136 additions and 77 deletions
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48
missing/flock.c
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@ -78,6 +78,54 @@ flock(fd, operation)
}
return i;
}
#elif defined HAVE_FCNTL && defined HAVE_FCNTL_H
/* These are the flock() constants. Since this sytems doesn't have
flock(), the values of the constants are probably not available.
*/
# ifndef LOCK_SH
# define LOCK_SH 1
# endif
# ifndef LOCK_EX
# define LOCK_EX 2
# endif
# ifndef LOCK_NB
# define LOCK_NB 4
# endif
# ifndef LOCK_UN
# define LOCK_UN 8
# endif
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
int
flock(fd, operation)
int fd;
int operation;
{
struct flock lock;
switch (operation & ~LOCK_NB) {
case LOCK_SH:
lock.l_type = F_RDLCK;
break;
case LOCK_EX:
lock.l_type = F_WRLCK;
break;
case LOCK_UN:
lock.l_type = F_UNLCK;
break;
default:
errno = EINVAL;
return -1;
}
lock.l_whence = SEEK_SET;
lock.l_start = lock.l_len = 0L;
return fcntl(fd, (operation & LOCK_NB) ? F_SETLK : F_SETLKW, &lock);
}
#else
int
flock(fd, operation)