Top level directory reorg

Move src/po -> po Combine common and compat -> lib/util Move zlib -> lib/zlib
2014-06-26 15:51:02 -06:00
parent d41276f171
commit 4d37a4a162
187 changed files with 1083 additions and 1217 deletions
--- a/lib/util/closefrom.c
+++ b/lib/util/closefrom.c
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2004-2005, 2007, 2010, 2012-2013
+ *	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.
+ */
+
+#include <config.h>
+
+#ifndef HAVE_CLOSEFROM
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#include <fcntl.h>
+#include <limits.h>
+#ifdef HAVE_PSTAT_GETPROC
+# include <sys/param.h>
+# include <sys/pstat.h>
+#else
+# ifdef HAVE_DIRENT_H
+#  include <dirent.h>
+#  define NAMLEN(dirent) strlen((dirent)->d_name)
+# else
+#  define dirent direct
+#  define NAMLEN(dirent) (dirent)->d_namlen
+#  ifdef HAVE_SYS_NDIR_H
+#   include <sys/ndir.h>
+#  endif
+#  ifdef HAVE_SYS_DIR_H
+#   include <sys/dir.h>
+#  endif
+#  ifdef HAVE_NDIR_H
+#   include <ndir.h>
+#  endif
+# endif
+#endif
+
+#include "missing.h"
+
+#if defined(HAVE_FCNTL_CLOSEM) && !defined(HAVE_DIRFD)
+# define closefrom	closefrom_fallback
+#endif
+
+/*
+ * Close all file descriptors greater than or equal to lowfd.
+ * This is the expensive (fallback) method.
+ */
+void
+closefrom_fallback(int lowfd)
+{
+    long fd, maxfd;
+
+    /*
+     * Fall back on sysconf() or getdtablesize().  We avoid checking
+     * resource limits since it is possible to open a file descriptor
+     * and then drop the rlimit such that it is below the open fd.
+     */
+#ifdef HAVE_SYSCONF
+    maxfd = sysconf(_SC_OPEN_MAX);
+#else
+    maxfd = getdtablesize();
+#endif /* HAVE_SYSCONF */
+    if (maxfd < 0)
+	maxfd = OPEN_MAX;
+
+    for (fd = lowfd; fd < maxfd; fd++) {
+#ifdef __APPLE__
+	/* Avoid potential libdispatch crash when we close its fds. */
+	(void) fcntl((int) fd, F_SETFD, FD_CLOEXEC);
+#else
+	(void) close((int) fd);
+#endif
+    }
+}
+
+/*
+ * Close all file descriptors greater than or equal to lowfd.
+ * We try the fast way first, falling back on the slow method.
+ */
+#if defined(HAVE_FCNTL_CLOSEM)
+void
+closefrom(int lowfd)
+{
+    if (fcntl(lowfd, F_CLOSEM, 0) == -1)
+	closefrom_fallback(lowfd);
+}
+#elif defined(HAVE_PSTAT_GETPROC)
+void
+closefrom(int lowfd)
+{
+    struct pst_status pstat;
+    int fd;
+
+    if (pstat_getproc(&pstat, sizeof(pstat), 0, getpid()) != -1) {
+	for (fd = lowfd; fd <= pstat.pst_highestfd; fd++)
+	    (void) close(fd);
+    } else {
+	closefrom_fallback(lowfd);
+    }
+}
+#elif defined(HAVE_DIRFD)
+void
+closefrom(int lowfd)
+{
+    const char *path;
+    DIR *dirp;
+
+    /* Use /proc/self/fd (or /dev/fd on FreeBSD) if it exists. */
+# if defined(__FreeBSD__) || defined(__APPLE__)
+    path = "/dev/fd";
+# else
+    path = "/proc/self/fd";
+# endif
+    if ((dirp = opendir(path)) != NULL) {
+	struct dirent *dent;
+	while ((dent = readdir(dirp)) != NULL) {
+	    const char *errstr;
+	    int fd = strtonum(dent->d_name, lowfd, INT_MAX, &errstr);
+	    if (errstr == NULL && fd != dirfd(dirp)) {
+# ifdef __APPLE__
+		/* Avoid potential libdispatch crash when we close its fds. */
+		(void) fcntl(fd, F_SETFD, FD_CLOEXEC);
+# else
+		(void) close(fd);
+# endif
+	    }
+	}
+	(void) closedir(dirp);
+    } else
+	closefrom_fallback(lowfd);
+}
+#endif /* HAVE_FCNTL_CLOSEM */
+#endif /* HAVE_CLOSEFROM */