#pragma once

#include "types.hh"


namespace nix {


/* Open (possibly create) a lock file and return the file descriptor.
   -1 is returned if create is false and the lock could not be opened
   because it doesn't exist.  Any other error throws an exception. */
int openLockFile(const Path & path, bool create);

/* Delete an open lock file. */
void deleteLockFile(const Path & path, int fd);

enum LockType { ltRead, ltWrite, ltNone };

bool lockFile(int fd, LockType lockType, bool wait);


class PathLocks 
{
private:
    typedef std::pair<int, Path> FDPair;
    list<FDPair> fds;
    bool deletePaths;

public:
    PathLocks();
    PathLocks(const PathSet & paths,
        const string & waitMsg = "");
    bool lockPaths(const PathSet & _paths,
        const string & waitMsg = "",
        bool wait = true);
    ~PathLocks();
    void unlock();
    void setDeletion(bool deletePaths);
};


bool pathIsLockedByMe(const Path & path);


}
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<div class='path'>path: <a href='/guix/log/?id=fba3e9e28f253f54269e0e36af5a75d99f74dd26'>root</a>/<a href='/guix/log/tests?id=fba3e9e28f253f54269e0e36af5a75d99f74dd26'>tests</a>/<a href='/guix/log/tests/syscalls.scm?id=fba3e9e28f253f54269e0e36af5a75d99f74dd26'>syscalls.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/syscalls.scm?id=fba3e9e28f253f54269e0e36af5a75d99f74dd26&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-06-28 23:32:52 +0200'>2020-06-28</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=5e113cf4424b2746cbf3633cd2106c62b89e5b49'>tests: Do not fail when network interface aliases are present.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-06-05 19:20:23 +0200'>2020-06-05</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=ea924134f819eef072ba7df9080d39de97fd73e6'>tests: syscall: Support file-systems without extended attributes.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-06-02 10:24:03 +0200'>2020-06-02</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=cb21c14b0ae1f4c9fcad4927e3b2eb0c06d7b018'>tests: Allow passing on systems without support for swap devices.</a><span class='msg-avail'>...</span></td><td>Simon South</td></tr>
<tr><td><span title='2020-05-14 00:48:12 +0200'>2020-05-14</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=df05842332be80ed7f53022402b95cf711163b41'>syscalls: Add 'getxattr'.</a><span class='msg-avail'>...</span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>
<tr><td><span title='2020-02-11 12:33:35 +0100'>2020-02-11</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=1deca767be1b84b96633e317f3fcdd5165f95df3'>syscalls: Re-enable 'pivot-root' test.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-10-05 22:05:02 +0200'>2019-10-05</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=5e5f7167943b408ae55736a44908a82056c87780'>syscalls: Add 'add-to-entropy-count'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-06-27 11:14:40 +0200'>2019-06-27</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=4593f5a654b4e59c5025cc4f99914e24e82515a4'>syscalls: Add 'terminal-rows'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-07-03 17:50:04 +0200'>2018-07-03</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=25c7ff6a3ecbaa1e93b38d35c8cbff40b7f4edb8'>syscalls: Define AT_SYMLINK_NOFOLLOW et al.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-04-08 17:41:08 +0200'>2018-04-08</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=6ef80eb0d94181eb5f755a11fca0d428252ce753'>tests: Skip 'pivot-root' test on Ubuntu's 4.4 kernels.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-11-25 18:12:33 +0100'>2017-11-25</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=4aac8d059a2bec9f075ceea2a089ca029a71912c'>syscalls: Adjust utmpx test.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-07-12 16:15:30 +0200'>2017-07-12</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=0bc6fe323d34aabc7f51fa80b8872a2c1770d32a'>syscalls: Add network-interface-running?</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2017-06-16 17:08:22 +0200'>2017-06-16</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=fa73c1937364872560c509f02b3d7648a5bed006'>syscalls: Add 'scandir*'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-28 23:13:39 +0200'>2017-05-28</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=aa401f9ba6410095370ce0c4e5a01c02203a2b9f'>syscalls: Add 'thread-name' and 'set-thread-name'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-02-11 22:28:37 +0100'>2017-02-11</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=a1a8b7f2e20513a3ad968e74e7ec52546404e3c6'>tests: Relax test on utmpx entries.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-01-31 00:10:44 +0100'>2017-01-31</span></td><td><a href='/guix/commit/tests/syscalls.scm?id=f18eded8ec4df75444e4feaeb92b3cc1236c2253'>tests: Really skip /var/run/utmpx test when needed.</a><span class='msg-avail'>...</span></td><td>Paul Garlick</td></tr>