/*
* wrappers around low-level operations to provide a simpler interface
- * to the operations that Lisp needs
+ * to the operations that Lisp (and some contributed modules) needs.
*
* The functions in this file are typically called directly from Lisp.
* Thus, when their signature changes, they don't need updates in a .h
* files for more information.
*/
+#include "sbcl.h"
+
#include <sys/types.h>
#include <dirent.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
+#include <ctype.h>
#include <unistd.h>
+#include <errno.h>
+#include <limits.h>
+#include <fcntl.h>
+
+#ifndef LISP_FEATURE_WIN32
#include <pwd.h>
+#include <time.h>
+#include <sys/wait.h>
+#include <sys/resource.h>
+#include <netdb.h>
+#endif
#include <stdio.h>
+#if defined(LISP_FEATURE_WIN32)
+#define WIN32_LEAN_AND_MEAN
+#include <errno.h>
+#endif
+
#include "runtime.h"
-#include "sbcl.h"
#include "util.h"
+#include "wrap.h"
-/* KLUDGE: Neither the OpenBSD nor the Linux man page give a header
- * file to find this in (?). -- WHN 2002-02-07 */
+/* Although it might seem as though this should be in some standard
+ Unix header, according to Perry E. Metzger, in a message on
+ sbcl-devel dated 2004-03-29, this is the POSIXly-correct way of
+ using environ: by an explicit declaration. -- CSR, 2004-03-30 */
extern char **environ;
-\f
+\f
/*
* stuff needed by CL:DIRECTORY and other Lisp directory operations
*/
-/* Unix directory operations think of "." and ".." as filenames, but
- * Lisp directory operations do not. */
-int
-is_lispy_filename(const char *filename)
-{
- return strcmp(filename, ".") && strcmp(filename, "..");
-}
-
-/* Return a zero-terminated array of strings holding the Lispy filenames
- * (i.e. excluding the Unix magic "." and "..") in the named directory. */
-char**
-alloc_directory_lispy_filenames(const char *directory_name)
-{
- DIR *dir_ptr = opendir(directory_name);
- char **result = 0;
-
- if (dir_ptr) { /* if opendir success */
-
- struct voidacc va;
-
- if (0 == voidacc_ctor(&va)) { /* if voidacc_ctor success */
- struct dirent *dirent_ptr;
-
- while ( (dirent_ptr = readdir(dir_ptr)) ) { /* until end of data */
- char* original_name = dirent_ptr->d_name;
- if (is_lispy_filename(original_name)) {
- /* strdup(3) is in Linux and *BSD. If you port
- * somewhere else that doesn't have it, it's easy
- * to reimplement. */
- char* dup_name = strdup(original_name);
- if (!dup_name) { /* if strdup failure */
- goto dtors;
- }
- if (voidacc_acc(&va, dup_name)) { /* if acc failure */
- goto dtors;
- }
- }
- }
- result = (char**)voidacc_give_away_result(&va);
- }
-
- dtors:
- voidacc_dtor(&va);
- /* ignoring closedir(3) return code, since what could we do?
- *
- * "Never ask questions you don't want to know the answer to."
- * -- William Irving Zumwalt (Rich Cook, _The Wizardry Quested_) */
- closedir(dir_ptr);
- }
-
- return result;
-}
-
-/* Free a result returned by alloc_directory_lispy_filenames(). */
-void
-free_directory_lispy_filenames(char** directory_lispy_filenames)
-{
- char** p;
-
- /* Free the strings. */
- for (p = directory_lispy_filenames; *p; ++p) {
- free(*p);
- }
-
- /* Free the table of strings. */
- free(directory_lispy_filenames);
-}
\f
/*
* readlink(2) stuff
*/
+#ifndef LISP_FEATURE_WIN32
/* a wrapped version of readlink(2):
* -- If path isn't a symlink, or is a broken symlink, return 0.
* -- If path is a symlink, return a newly allocated string holding
{
int bufsiz = strlen(path) + 16;
while (1) {
- char *result = malloc(bufsiz);
- int n_read = readlink(path, result, bufsiz);
- if (n_read < 0) {
- free(result);
- return 0;
- } else if (n_read < bufsiz) {
- result[n_read] = 0;
- return result;
- } else {
- free(result);
- bufsiz *= 2;
- }
+ char *result = malloc(bufsiz);
+ int n_read = readlink(path, result, bufsiz);
+ if (n_read < 0) {
+ free(result);
+ return 0;
+ } else if (n_read < bufsiz) {
+ result[n_read] = 0;
+ return result;
+ } else {
+ free(result);
+ bufsiz *= 2;
+ }
}
}
+#endif
\f
/*
- * stat(2) stuff
+ * realpath(3), including a wrapper for Windows.
*/
+char * sb_realpath (char *path)
+{
+#ifndef LISP_FEATURE_WIN32
+ char *ret;
+ int errnum;
+
+ if ((ret = calloc(PATH_MAX, sizeof(char))) == NULL)
+ return NULL;
+ if (realpath(path, ret) == NULL) {
+ errnum = errno;
+ free(ret);
+ errno = errnum;
+ return NULL;
+ }
+ return(ret);
+#else
+ char *ret;
+ char *cp;
+ int errnum;
-/* As of 0.6.12, the FFI can't handle 64-bit values. For now, we use
- * these munged-to-32-bits values for might-be-64-bit slots of
- * stat_wrapper as a workaround, so that at least we can still work
- * when values are small.
+ if ((ret = calloc(MAX_PATH, sizeof(char))) == NULL)
+ return NULL;
+ if (GetFullPathName(path, MAX_PATH, ret, &cp) == 0) {
+ errnum = errno;
+ free(ret);
+ errno = errnum;
+ return NULL;
+ }
+ return(ret);
+#endif
+}
+\f
+/* readdir, closedir, and dirent name accessor. The first three are not strictly
+ * necessary, but should save us some #!+netbsd in the build, and this also allows
+ * building Windows versions using the non-ANSI variants of FindFirstFile &co
+ * under the same API. (Use a structure that appends the handle to the WIN32_FIND_DATA
+ * as the return value from sb_opendir, on sb_readdir grab the name from the previous
+ * call and save the new one.) Nikodemus thought he would have to do that to support
+ * DIRECTORY on UNC paths, but turns out opendir &co do TRT on Windows already -- so
+ * leaving that bit of tedium for a later date, once we figure out the whole *A vs. *W
+ * issue out properly. ...FIXME, obviously, as per above.
*
- * FIXME: But of course we should fix the FFI so that we can use the
- * actual 64-bit values instead. In fact, we probably have by now
- * (2003-10-03) on all working platforms except MIPS and HPPA; if some
- * motivated spark would simply fix those, this hack could go away.
- * -- CSR, 2003-10-03 */
-typedef u32 ffi_dev_t; /* since Linux dev_t can be 64 bits */
-typedef u32 ffi_off_t; /* since OpenBSD 2.8 st_size is 64 bits */
-
-/* a representation of stat(2) results which doesn't depend on CPU or OS */
-struct stat_wrapper {
- /* KLUDGE: The verbose wrapped_st_ prefixes are to protect us from
- * the C preprocessor as wielded by the fiends of OpenBSD, who do
- * things like
- * #define st_atime st_atimespec.tv_sec
- * I remember when I was young and innocent, I read about how the
- * C preprocessor isn't to be used to globally munge random
- * lowercase symbols like this, because things like this could
- * happen, and I nodded sagely. But now I know better.:-| This is
- * another entry for Dan Barlow's ongoing episodic rant about C
- * header files, I guess.. -- WHN 2001-05-10 */
- ffi_dev_t wrapped_st_dev; /* device */
- ino_t wrapped_st_ino; /* inode */
- mode_t wrapped_st_mode; /* protection */
- nlink_t wrapped_st_nlink; /* number of hard links */
- uid_t wrapped_st_uid; /* user ID of owner */
- gid_t wrapped_st_gid; /* group ID of owner */
- ffi_dev_t wrapped_st_rdev; /* device type (if inode device) */
- ffi_off_t wrapped_st_size; /* total size, in bytes */
- unsigned long wrapped_st_blksize; /* blocksize for filesystem I/O */
- unsigned long wrapped_st_blocks; /* number of blocks allocated */
- time_t wrapped_st_atime; /* time_t of last access */
- time_t wrapped_st_mtime; /* time_t of last modification */
- time_t wrapped_st_ctime; /* time_t of last change */
-};
-
-static void
+ * Once that is done, the lisp side functions are best named OS-OPENDIR, etc.
+ */
+extern DIR *
+sb_opendir(char * name)
+{
+ return opendir(name);
+}
+
+extern struct dirent *
+sb_readdir(DIR * dirp)
+{
+ return readdir(dirp);
+}
+
+extern int
+sb_closedir(DIR * dirp)
+{
+ return closedir(dirp);
+}
+
+extern char *
+sb_dirent_name(struct dirent * ent)
+{
+ return ent->d_name;
+}
+\f
+/*
+ * stat(2) stuff
+ */
+
+static void
copy_to_stat_wrapper(struct stat_wrapper *to, struct stat *from)
{
#define FROB(stem) to->wrapped_st_##stem = from->st_##stem
+#ifndef LISP_FEATURE_WIN32
+#define FROB2(stem) to->wrapped_st_##stem = from->st_##stem
+#else
+#define FROB2(stem) to->wrapped_st_##stem = 0;
+#endif
FROB(dev);
- FROB(ino);
+ FROB2(ino);
FROB(mode);
FROB(nlink);
- FROB(uid);
- FROB(gid);
+ FROB2(uid);
+ FROB2(gid);
FROB(rdev);
FROB(size);
- FROB(blksize);
- FROB(blocks);
+ FROB2(blksize);
+ FROB2(blocks);
FROB(atime);
FROB(mtime);
FROB(ctime);
{
struct stat real_buf;
int ret;
+
+#ifdef LISP_FEATURE_WIN32
+ /*
+ * Windows won't match the last component of a pathname if there
+ * is a trailing #\/ or #\\, except if it's <drive>:\ or <drive>:/
+ * in which case it behaves the other way around. So we remove the
+ * trailing directory separator unless we are being passed just a
+ * drive name (e.g. "c:\\"). Some, but not all, of this
+ * strangeness is documented at Microsoft's support site (as of
+ * 2006-01-08, at
+ * <http://support.microsoft.com/default.aspx?scid=kb;en-us;168439>)
+ */
+ char file_buf[MAX_PATH];
+ strcpy(file_buf, file_name);
+ int len = strlen(file_name);
+ if (len != 0 && (file_name[len-1] == '/' || file_name[len-1] == '\\') &&
+ !(len == 3 && file_name[1] == ':' && isalpha(file_name[0])))
+ file_buf[len-1] = '\0';
+ file_name = file_buf;
+#endif
+
if ((ret = stat(file_name,&real_buf)) >= 0)
- copy_to_stat_wrapper(buf, &real_buf);
+ copy_to_stat_wrapper(buf, &real_buf);
return ret;
}
+#ifndef LISP_FEATURE_WIN32
int
lstat_wrapper(const char *file_name, struct stat_wrapper *buf)
{
struct stat real_buf;
int ret;
- if ((ret = lstat(file_name,&real_buf)) >= 0)
- copy_to_stat_wrapper(buf, &real_buf);
+ if ((ret = lstat(file_name,&real_buf)) >= 0)
+ copy_to_stat_wrapper(buf, &real_buf);
return ret;
}
+#else
+/* cleaner to do it here than in Lisp */
+int lstat_wrapper(const char *file_name, struct stat_wrapper *buf)
+{
+ return stat_wrapper(file_name, buf);
+}
+#endif
int
fstat_wrapper(int filedes, struct stat_wrapper *buf)
struct stat real_buf;
int ret;
if ((ret = fstat(filedes,&real_buf)) >= 0)
- copy_to_stat_wrapper(buf, &real_buf);
+ copy_to_stat_wrapper(buf, &real_buf);
return ret;
}
\f
+/* A wrapper for mkstemp(3), for two reasons: (1) mkstemp does not
+ exist on Windows; (2) by passing down a mode_t, we don't need a
+ binding to chmod in SB-UNIX, and need not concern ourselves with
+ umask issues if we want to use mkstemp to make new files in
+ OPEN. */
+int sb_mkstemp (char *template, mode_t mode) {
+#ifdef LISP_FEATURE_WIN32
+#define PATHNAME_BUFFER_SIZE MAX_PATH
+#define MKTEMP _mktemp
+#else
+#define PATHNAME_BUFFER_SIZE PATH_MAX
+#define MKTEMP mktemp
+#endif
+ int fd;
+ char buf[PATHNAME_BUFFER_SIZE];
+
+ while (1) {
+ /* Fruit fallen from the tree: for people who like
+ microoptimizations, we might not need to copy the whole
+ template on every loop, but only the last several characters.
+ But I didn't feel like testing the boundary cases in Windows's
+ _mktemp. */
+ strncpy(buf, template, PATHNAME_BUFFER_SIZE);
+ buf[PATHNAME_BUFFER_SIZE-1]=0; /* force NULL-termination */
+ if (MKTEMP(buf)) {
+ if ((fd=open(buf, O_CREAT|O_EXCL|O_RDWR, mode))!=-1) {
+ strcpy(template, buf);
+ return (fd);
+ } else
+ if (errno != EEXIST)
+ return (-1);
+ } else
+ return (-1);
+ }
+#undef MKTEMP
+#undef PATHNAME_BUFFER_SIZE
+}
+
+\f
/*
* getpwuid() stuff
*/
+#ifndef LISP_FEATURE_WIN32
/* Return a newly-allocated string holding the username for "uid", or
* NULL if there's no such user.
*
{
struct passwd *p = getpwuid(uid);
if (p) {
- /* The object *p is a static struct which'll be overwritten by
- * the next call to getpwuid(), so it'd be unsafe to return
- * p->pw_name without copying. */
- return strdup(p->pw_name);
+ /* The object *p is a static struct which'll be overwritten by
+ * the next call to getpwuid(), so it'd be unsafe to return
+ * p->pw_name without copying. */
+ return strdup(p->pw_name);
} else {
- return 0;
+ return 0;
}
}
char *
-uid_homedir(uid_t uid)
+passwd_homedir(struct passwd *p)
{
- struct passwd *p = getpwuid(uid);
- if(p) {
- /* Let's be careful about this, shall we? */
- size_t len = strlen(p->pw_dir);
- if (p->pw_dir[len-1] == '/') {
- return strdup(p->pw_dir);
- } else {
- char *result = malloc(len + 2);
- if (result) {
- int nchars = sprintf(result,"%s/",p->pw_dir);
- if (nchars == len + 1) {
- return result;
- } else {
- return 0;
- }
- } else {
- return 0;
- }
- }
+ if (p) {
+ /* Let's be careful about this, shall we? */
+ size_t len = strlen(p->pw_dir);
+ if (p->pw_dir[len-1] == '/') {
+ return strdup(p->pw_dir);
+ } else {
+ char *result = malloc(len + 2);
+ if (result) {
+ unsigned int nchars = sprintf(result,"%s/",p->pw_dir);
+ if (nchars == len + 1) {
+ return result;
+ } else {
+ return 0;
+ }
+ } else {
+ return 0;
+ }
+ }
} else {
- return 0;
+ return 0;
}
}
+
+char *
+user_homedir(char *name)
+{
+ return passwd_homedir(getpwnam(name));
+}
+
+char *
+uid_homedir(uid_t uid)
+{
+ return passwd_homedir(getpwuid(uid));
+}
+#endif /* !LISP_FEATURE_WIN32 */
\f
/*
* functions to get miscellaneous C-level variables
{
return environ;
}
+
+#ifdef LISP_FEATURE_WIN32
+#include <windows.h>
+#include <time.h>
+/*
+ * faked-up implementation of select(). Right now just enough to get through
+ * second genesis.
+ */
+int sb_select(int top_fd, DWORD *read_set, DWORD *write_set, DWORD *except_set, time_t *timeout)
+{
+ /*
+ * FIXME: Going forward, we may want to use MsgWaitForMultipleObjects
+ * in order to support a windows message loop inside serve-event.
+ */
+ HANDLE handles[MAXIMUM_WAIT_OBJECTS];
+ int fds[MAXIMUM_WAIT_OBJECTS];
+ int num_handles;
+ int i;
+ DWORD retval;
+ int polling_write;
+ DWORD win_timeout;
+
+ num_handles = 0;
+ polling_write = 0;
+ for (i = 0; i < top_fd; i++) {
+ if (except_set) except_set[i >> 5] = 0;
+ if (write_set && (write_set[i >> 5] & (1 << (i & 31)))) polling_write = 1;
+ if (read_set[i >> 5] & (1 << (i & 31))) {
+ read_set[i >> 5] &= ~(1 << (i & 31));
+ fds[num_handles] = i;
+ handles[num_handles++] = (HANDLE) _get_osfhandle(i);
+ }
+ }
+
+ win_timeout = INFINITE;
+ if (timeout) win_timeout = (timeout[0] * 1000) + timeout[1];
+
+ /* Last parameter here is timeout in milliseconds. */
+ /* retval = WaitForMultipleObjects(num_handles, handles, 0, INFINITE); */
+ retval = WaitForMultipleObjects(num_handles, handles, 0, win_timeout);
+
+ if (retval < WAIT_ABANDONED) {
+ /* retval, at this point, is the index of the single live HANDLE/fd. */
+ read_set[fds[retval] >> 5] |= (1 << (fds[retval] & 31));
+ return 1;
+ }
+ return polling_write;
+}
+
+/*
+ * Windows doesn't have gettimeofday(), and we need it for the compiler,
+ * for serve-event, and for a couple other things. We don't need a timezone
+ * yet, however, and the closest we can easily get to a timeval is the
+ * seconds part. So that's what we do.
+ */
+#define UNIX_EPOCH_FILETIME 116444736000000000ULL
+
+int sb_gettimeofday(long *timeval, long *timezone)
+{
+ FILETIME ft;
+ ULARGE_INTEGER uft;
+ GetSystemTimeAsFileTime(&ft);
+ uft.LowPart = ft.dwLowDateTime;
+ uft.HighPart = ft.dwHighDateTime;
+ uft.QuadPart -= UNIX_EPOCH_FILETIME;
+ timeval[0] = uft.QuadPart / 10000000;
+ timeval[1] = (uft.QuadPart % 10000000)/10;
+
+ return 0;
+}
+#endif
+
+
+/* We will need to define these things or their equivalents for Win32
+ eventually, but for now let's get it working for everyone else. */
+#ifndef LISP_FEATURE_WIN32
+/* From SB-BSD-SOCKETS, to get h_errno */
+int get_h_errno()
+{
+ return h_errno;
+}
+
+/* From SB-POSIX, wait-macros */
+int wifexited(int status) {
+ return WIFEXITED(status);
+}
+int wexitstatus(int status) {
+ return WEXITSTATUS(status);
+}
+int wifsignaled(int status) {
+ return WIFSIGNALED(status);
+}
+int wtermsig(int status) {
+ return WTERMSIG(status);
+}
+int wifstopped(int status) {
+ return WIFSTOPPED(status);
+}
+int wstopsig(int status) {
+ return WSTOPSIG(status);
+}
+/* FIXME: POSIX also defines WIFCONTINUED, but that appears not to
+ exist on at least Linux... */
+#endif /* !LISP_FEATURE_WIN32 */
+
+/* From SB-POSIX, stat-macros */
+int s_isreg(mode_t mode)
+{
+ return S_ISREG(mode);
+}
+int s_isdir(mode_t mode)
+{
+ return S_ISDIR(mode);
+}
+int s_ischr(mode_t mode)
+{
+ return S_ISCHR(mode);
+}
+int s_isblk(mode_t mode)
+{
+ return S_ISBLK(mode);
+}
+int s_isfifo(mode_t mode)
+{
+ return S_ISFIFO(mode);
+}
+#ifndef LISP_FEATURE_WIN32
+int s_islnk(mode_t mode)
+{
+#ifdef S_ISLNK
+ return S_ISLNK(mode);
+#else
+ return ((mode & S_IFMT) == S_IFLNK);
+#endif
+}
+int s_issock(mode_t mode)
+{
+#ifdef S_ISSOCK
+ return S_ISSOCK(mode);
+#else
+ return ((mode & S_IFMT) == S_IFSOCK);
+#endif
+}
+#endif /* !LISP_FEATURE_WIN32 */
+
+#ifndef LISP_FEATURE_WIN32
+int sb_getrusage(int who, struct rusage *rusage)
+{
+ return getrusage(who, rusage);
+}
+
+int sb_gettimeofday(struct timeval *tp, void *tzp)
+{
+ return gettimeofday(tp, tzp);
+}
+
+int sb_nanosleep(struct timespec *rqtp, struct timespec *rmtp)
+{
+ return nanosleep(rqtp, rmtp);
+}
+
+int sb_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+ struct timeval *timeout)
+{
+ return select(nfds, readfds, writefds, exceptfds, timeout);
+}
+
+int sb_getitimer(int which, struct itimerval *value)
+{
+ return getitimer(which, value);
+}
+
+int sb_setitimer(int which, struct itimerval *value, struct itimerval *ovalue)
+{
+ return setitimer(which, value, ovalue);
+}
+#endif /* !LISP_FEATURE_WIN32 */
+
projects / sbcl.git / blobdiff