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#include <wibble/sys/lockfile.h>
#ifdef POSIX
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <wibble/exception.h>
namespace wibble {
namespace sys {
namespace fs {
Lockfile::Lockfile(const std::string& name, bool write) : name(name), fd(-1)
{
fd = open(name.c_str(), (write ? O_RDWR : O_RDONLY) | O_CREAT, 0666);
if (fd == -1)
throw wibble::exception::System("opening/creating lockfile " + name);
struct flock lock;
lock.l_type = (write ? F_WRLCK : F_RDLCK);
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 0;
if (fcntl(fd, F_SETLK, &lock) == -1)
throw wibble::exception::System("locking the file " + name + " for writing");
}
Lockfile::~Lockfile()
{
if (fd != -1)
{
struct flock lock;
lock.l_type = F_UNLCK;
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 0;
fcntl(fd, F_SETLK, &lock);
close(fd);
}
}
}
}
}
// vim:set ts=4 sw=4:
#endif
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