git

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#include "git-compat-util.h"
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#include "config.h"
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#include "fsmonitor-ll.h"
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#include "fsmonitor-ipc.h"
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#include "fsmonitor-settings.h"
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#include "fsmonitor-path-utils.h"
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 /*
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 * For the builtin FSMonitor, we create the Unix domain socket for the
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 * IPC in the .git directory.  If the working directory is remote,
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 * then the socket will be created on the remote file system.  This
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 * can fail if the remote file system does not support UDS file types
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 * (e.g. smbfs to a Windows server) or if the remote kernel does not
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 * allow a non-local process to bind() the socket.  (These problems
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 * could be fixed by moving the UDS out of the .git directory and to a
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 * well-known local directory on the client machine, but care should
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 * be taken to ensure that $HOME is actually local and not a managed
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 * file share.)
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 *
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 * FAT32 and NTFS working directories are problematic too.
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 *
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 * The builtin FSMonitor uses a Unix domain socket in the .git
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 * directory for IPC.  These Windows drive formats do not support
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 * Unix domain sockets, so mark them as incompatible for the daemon.
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 *
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 */
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static enum fsmonitor_reason check_uds_volume(struct repository *r)
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{
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	struct fs_info fs;
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	const char *ipc_path = fsmonitor_ipc__get_path(r);
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	struct strbuf path = STRBUF_INIT;
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	strbuf_add(&path, ipc_path, strlen(ipc_path));
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	if (fsmonitor__get_fs_info(dirname(path.buf), &fs) == -1) {
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		strbuf_release(&path);
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		return FSMONITOR_REASON_ERROR;
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	}
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	strbuf_release(&path);
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	if (fs.is_remote ||
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		!strcmp(fs.typename, "msdos") ||
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		!strcmp(fs.typename, "ntfs")) {
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		free(fs.typename);
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		return FSMONITOR_REASON_NOSOCKETS;
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	}
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	free(fs.typename);
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	return FSMONITOR_REASON_OK;
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}
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enum fsmonitor_reason fsm_os__incompatible(struct repository *r, int ipc)
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{
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	enum fsmonitor_reason reason;
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	if (ipc) {
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		reason = check_uds_volume(r);
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		if (reason != FSMONITOR_REASON_OK)
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			return reason;
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	}
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	return FSMONITOR_REASON_OK;
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}
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