X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fwrap.c;h=8d576d196ddf74e8387386b3b8dece316be2c963;hb=7fb597b585fc715537ea644f7d84440eca217ca1;hp=fee9df9f28b82e53c6b41c3b00365ad6bbf8658e;hpb=a18f0a95bc9a457e4d2d00c702b746f29c2662b1;p=sbcl.git diff --git a/src/runtime/wrap.c b/src/runtime/wrap.c index fee9df9..8d576d1 100644 --- a/src/runtime/wrap.c +++ b/src/runtime/wrap.c @@ -6,7 +6,7 @@ * Thus, when their signature changes, they don't need updates in a .h * file somewhere, but they do need updates in the Lisp code. FIXME: * It would be nice to enforce this at compile time. It mighn't even - * be all that hard: make the cross-compiler versions of DEF-ALIEN-FOO + * be all that hard: make the cross-compiler versions of DEFINE-ALIEN-FOO * macros accumulate strings in a list which then gets written out at * the end of sbcl2.h at the end of cross-compilation, then rerun * 'make' in src/runtime/ using the new sbcl2.h as sbcl.h (and make @@ -23,12 +23,28 @@ * files for more information. */ +#include "sbcl.h" + #include #include +#include +#include #include +#include +#ifndef LISP_FEATURE_WIN32 +#include +#endif +#include +#include "runtime.h" #include "util.h" - + +/* 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; + /* * stuff needed by CL:DIRECTORY and other Lisp directory operations */ @@ -46,47 +62,47 @@ is_lispy_filename(const char *filename) char** alloc_directory_lispy_filenames(const char *directory_name) { - DIR *dir_ptr; + DIR *dir_ptr = opendir(directory_name); char **result = 0; - if (dir_ptr = opendir(directory_name)) { /* 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); - } + 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); + 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. */ +/* Free a result returned by alloc_directory_lispy_filenames(). */ void free_directory_lispy_filenames(char** directory_lispy_filenames) { @@ -94,9 +110,328 @@ free_directory_lispy_filenames(char** directory_lispy_filenames) /* Free the strings. */ for (p = directory_lispy_filenames; *p; ++p) { - free(*p); + free(*p); } /* Free the table of strings. */ free(directory_lispy_filenames); } + +/* + * 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 + * the thing it's linked to. */ +char * +wrapped_readlink(char *path) +{ + 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; + } + } +} +#endif + +/* + * stat(2) stuff + */ + +/* 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. + * + * 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 + * + * Some motivated spark fixed MIPS. -- ths, 2005-10-06 */ + +#ifdef LISP_FEATURE_MIPS +typedef unsigned long ffi_dev_t; /* Linux/MIPS struct stat doesn't use dev_t */ +typedef off_t ffi_off_t; +#else +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 */ +#endif + +/* 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 */ +#ifndef LISP_FEATURE_WIN32 + 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 */ +#else + short wrapped_st_nlink; /* Win32 doesn't have nlink_t */ + short wrapped_st_uid; /* Win32 doesn't have st_uid */ + short wrapped_st_gid; /* Win32 doesn't have st_gid */ +#endif + 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 +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); + FROB2(ino); + FROB(mode); + FROB(nlink); + FROB2(uid); + FROB2(gid); + FROB(rdev); + FROB(size); + FROB2(blksize); + FROB2(blocks); + FROB(atime); + FROB(mtime); + FROB(ctime); +#undef FROB +} + +int +stat_wrapper(const char *file_name, struct stat_wrapper *buf) +{ + 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 #\/ character. So we do silly things like this: + */ + char file_buf[MAX_PATH]; + strcpy(file_buf, file_name); + int foo = strlen(file_name); + if (foo && (file_name[foo-1] == '/')) file_buf[foo-1] = 0; + file_name = file_buf; +#endif + + if ((ret = stat(file_name,&real_buf)) >= 0) + 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); + 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); + return ret; +} + +/* + * getpwuid() stuff + */ + +#ifndef LISP_FEATURE_WIN32 +/* Return a newly-allocated string holding the username for "uid", or + * NULL if there's no such user. + * + * KLUDGE: We also return NULL if malloc() runs out of memory + * (returning strdup() result) since it's not clear how to handle that + * error better. -- WHN 2001-12-28 */ +char * +uid_username(int uid) +{ + 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); + } else { + return 0; + } +} + +char * +uid_homedir(uid_t uid) +{ + 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; + } + } + } else { + return 0; + } +} +#endif /* !LISP_FEATURE_WIN32 */ + +/* + * functions to get miscellaneous C-level variables + * + * (Doing this by calling functions lets us borrow the smarts of the C + * linker, so that things don't blow up when libc versions and thus + * variable locations change between compile time and run time.) + */ + +char ** +wrapped_environ() +{ + return environ; +} + +#ifdef LISP_FEATURE_WIN32 +#define WIN32_LEAN_AND_MEAN +#include +/* + * faked-up implementation of select(). Right now just enough to get through + * second genesis. + */ +int 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++] = _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; +} + +/* + * SBCL doesn't like backslashes in pathnames from getcwd for some reason. + * Probably because they don't happen in posix systems. Windows doesn't + * mind slashes, so we convert from one to the other. We also strip off + * the drive prefix while we're at it ("C:", or whatever). + * + * The real fix for this problem is to create a windows-host setup that + * parallels the unix-host in src/code/target-pathname.lisp and actually + * parse this junk properly, drive letter and everything. + * + * Also see POSIX-GETCWD in src/code/unix.lisp. + */ +char *wrap_getcwd(char *buf, size_t len) +{ + char *retval = _getcwd(buf, len); + + if (retval[1] == ':') { + char *p; + for (p = retval; (*p = p[2]); p++) + if (*p == '\\') *p = '/'; + } + + return retval; +} + +/* + * 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. + */ +int gettimeofday(long *timeval, long *timezone) +{ + timeval[0] = time(NULL); + timeval[1] = 0; + + return 0; +} +#endif