Split fileops.c into parseln.c and locking.c

2014-06-27 09:46:24 -06:00
parent aecef4aa1d
commit 8e088e65c0
12 changed files with 473 additions and 472 deletions
--- a/lib/util/locking.c
+++ b/lib/util/locking.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 1999-2005, 2007, 2009-2014
+ *	Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#ifdef HAVE_FLOCK
+# include <sys/file.h>
+#endif /* HAVE_FLOCK */
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
+#  include <memory.h>
+# endif
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRING_H */
+#if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
+# include <malloc.h>
+#endif /* HAVE_MALLOC_H && !STDC_HEADERS */
+#include <ctype.h>
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#include <fcntl.h>
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include "compat/stdbool.h"
+#endif
+
+#include "missing.h"
+#include "sudo_util.h"
+#include "sudo_debug.h"
+
+/*
+ * Lock/unlock a file.
+ */
+#ifdef HAVE_LOCKF
+bool
+sudo_lock_file(int fd, int lockit)
+{
+    int op = 0;
+    debug_decl(sudo_lock_file, SUDO_DEBUG_UTIL)
+
+    switch (lockit) {
+	case SUDO_LOCK:
+	    op = F_LOCK;
+	    break;
+	case SUDO_TLOCK:
+	    op = F_TLOCK;
+	    break;
+	case SUDO_UNLOCK:
+	    op = F_ULOCK;
+	    break;
+    }
+    debug_return_bool(lockf(fd, op, 0) == 0);
+}
+#elif defined(HAVE_FLOCK)
+bool
+sudo_lock_file(int fd, int lockit)
+{
+    int op = 0;
+    debug_decl(sudo_lock_file, SUDO_DEBUG_UTIL)
+
+    switch (lockit) {
+	case SUDO_LOCK:
+	    op = LOCK_EX;
+	    break;
+	case SUDO_TLOCK:
+	    op = LOCK_EX | LOCK_NB;
+	    break;
+	case SUDO_UNLOCK:
+	    op = LOCK_UN;
+	    break;
+    }
+    debug_return_bool(flock(fd, op) == 0);
+}
+#else
+bool
+sudo_lock_file(int fd, int lockit)
+{
+#ifdef F_SETLK
+    int func;
+    struct flock lock;
+    debug_decl(sudo_lock_file, SUDO_DEBUG_UTIL)
+
+    lock.l_start = 0;
+    lock.l_len = 0;
+    lock.l_pid = getpid();
+    lock.l_type = (lockit == SUDO_UNLOCK) ? F_UNLCK : F_WRLCK;
+    lock.l_whence = SEEK_SET;
+    func = (lockit == SUDO_LOCK) ? F_SETLKW : F_SETLK;
+
+    debug_return_bool(fcntl(fd, func, &lock) == 0);
+#else
+    return true;
+#endif
+}
+#endif