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Diffstat (limited to 'winsup/utils/path.cc')
| -rw-r--r-- | winsup/utils/path.cc | 941 |
1 files changed, 0 insertions, 941 deletions
diff --git a/winsup/utils/path.cc b/winsup/utils/path.cc deleted file mode 100644 index 5f4cf6f15..000000000 --- a/winsup/utils/path.cc +++ /dev/null @@ -1,941 +0,0 @@ -/* path.cc - - Copyright 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010, - 2011 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -/* The purpose of this file is to hide all the details about accessing - Cygwin's mount table, shortcuts, etc. If the format or location of - the mount table, or the shortcut format changes, this is the file to - change to match it. */ - -#define str(a) #a -#define scat(a,b) str(a##b) -#include <windows.h> -#include <lmcons.h> -#include <stdio.h> -#include <stdlib.h> -#include <malloc.h> -#include <wchar.h> -#include "path.h" -#include "cygwin/include/cygwin/version.h" -#include "cygwin/include/sys/mount.h" -#include "cygwin/include/mntent.h" -#include "testsuite.h" -#ifdef FSTAB_ONLY -#include <sys/cygwin.h> -#endif -#include "loadlib.h" - -#ifndef FSTAB_ONLY -/* Used when treating / and \ as equivalent. */ -#define isslash(ch) \ - ({ \ - char __c = (ch); \ - ((__c) == '/' || (__c) == '\\'); \ - }) - - -static const GUID GUID_shortcut = - {0x00021401L, 0, 0, {0xc0, 0, 0, 0, 0, 0, 0, 0x46}}; - -enum { - WSH_FLAG_IDLIST = 0x01, /* Contains an ITEMIDLIST. */ - WSH_FLAG_FILE = 0x02, /* Contains a file locator element. */ - WSH_FLAG_DESC = 0x04, /* Contains a description. */ - WSH_FLAG_RELPATH = 0x08, /* Contains a relative path. */ - WSH_FLAG_WD = 0x10, /* Contains a working dir. */ - WSH_FLAG_CMDLINE = 0x20, /* Contains command line args. */ - WSH_FLAG_ICON = 0x40 /* Contains a custom icon. */ -}; - -struct win_shortcut_hdr - { - DWORD size; /* Header size in bytes. Must contain 0x4c. */ - GUID magic; /* GUID of shortcut files. */ - DWORD flags; /* Content flags. See above. */ - - /* The next fields from attr to icon_no are always set to 0 in Cygwin - and U/Win shortcuts. */ - DWORD attr; /* Target file attributes. */ - FILETIME ctime; /* These filetime items are never touched by the */ - FILETIME mtime; /* system, apparently. Values don't matter. */ - FILETIME atime; - DWORD filesize; /* Target filesize. */ - DWORD icon_no; /* Icon number. */ - - DWORD run; /* Values defined in winuser.h. Use SW_NORMAL. */ - DWORD hotkey; /* Hotkey value. Set to 0. */ - DWORD dummy[2]; /* Future extension probably. Always 0. */ - }; - -static bool -cmp_shortcut_header (win_shortcut_hdr *file_header) -{ - /* A Cygwin or U/Win shortcut only contains a description and a relpath. - Cygwin shortcuts also might contain an ITEMIDLIST. The run type is - always set to SW_NORMAL. */ - return file_header->size == sizeof (win_shortcut_hdr) - && !memcmp (&file_header->magic, &GUID_shortcut, sizeof GUID_shortcut) - && (file_header->flags & ~WSH_FLAG_IDLIST) - == (WSH_FLAG_DESC | WSH_FLAG_RELPATH) - && file_header->run == SW_NORMAL; -} - -int -get_word (HANDLE fh, int offset) -{ - unsigned short rv; - unsigned r; - - SetLastError(NO_ERROR); - if (SetFilePointer (fh, offset, 0, FILE_BEGIN) == INVALID_SET_FILE_POINTER - && GetLastError () != NO_ERROR) - return -1; - - if (!ReadFile (fh, &rv, 2, (DWORD *) &r, 0)) - return -1; - - return rv; -} - -/* - * Check the value of GetLastError() to find out whether there was an error. - */ -int -get_dword (HANDLE fh, int offset) -{ - int rv; - unsigned r; - - SetLastError(NO_ERROR); - if (SetFilePointer (fh, offset, 0, FILE_BEGIN) == INVALID_SET_FILE_POINTER - && GetLastError () != NO_ERROR) - return -1; - - if (!ReadFile (fh, &rv, 4, (DWORD *) &r, 0)) - return -1; - - return rv; -} - -#define EXE_MAGIC ((int)*(unsigned short *)"MZ") -#define SHORTCUT_MAGIC ((int)*(unsigned short *)"L\0") -#define SYMLINK_COOKIE "!<symlink>" -#define SYMLINK_MAGIC ((int)*(unsigned short *)SYMLINK_COOKIE) - -bool -is_exe (HANDLE fh) -{ - int magic = get_word (fh, 0x0); - return magic == EXE_MAGIC; -} - -bool -is_symlink (HANDLE fh) -{ - int magic = get_word (fh, 0x0); - if (magic != SHORTCUT_MAGIC && magic != SYMLINK_MAGIC) - return false; - DWORD got; - BY_HANDLE_FILE_INFORMATION local; - if (!GetFileInformationByHandle (fh, &local)) - return false; - if (magic == SHORTCUT_MAGIC) - { - DWORD size; - if (!local.dwFileAttributes & FILE_ATTRIBUTE_READONLY) - return false; /* Not a Cygwin symlink. */ - if ((size = GetFileSize (fh, NULL)) > 8192) - return false; /* Not a Cygwin symlink. */ - char buf[size]; - SetFilePointer (fh, 0, 0, FILE_BEGIN); - if (!ReadFile (fh, buf, size, &got, 0)) - return false; - if (got != size || !cmp_shortcut_header ((win_shortcut_hdr *) buf)) - return false; /* Not a Cygwin symlink. */ - /* TODO: check for invalid path contents - (see symlink_info::check() in ../cygwin/path.cc) */ - } - else /* magic == SYMLINK_MAGIC */ - { - if (!local.dwFileAttributes & FILE_ATTRIBUTE_SYSTEM) - return false; /* Not a Cygwin symlink. */ - char buf[sizeof (SYMLINK_COOKIE) - 1]; - SetFilePointer (fh, 0, 0, FILE_BEGIN); - if (!ReadFile (fh, buf, sizeof (buf), &got, 0)) - return false; - if (got != sizeof (buf) || - memcmp (buf, SYMLINK_COOKIE, sizeof (buf)) != 0) - return false; /* Not a Cygwin symlink. */ - } - return true; -} - -/* Assumes is_symlink(fh) is true */ -bool -readlink (HANDLE fh, char *path, int maxlen) -{ - DWORD rv; - char *buf, *cp; - unsigned short len; - win_shortcut_hdr *file_header; - BY_HANDLE_FILE_INFORMATION fi; - - if (!GetFileInformationByHandle (fh, &fi) - || fi.nFileSizeHigh != 0 - || fi.nFileSizeLow > 4 * 65536) - return false; - - buf = (char *) alloca (fi.nFileSizeLow + 1); - file_header = (win_shortcut_hdr *) buf; - - if (SetFilePointer (fh, 0L, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER - || !ReadFile (fh, buf, fi.nFileSizeLow, &rv, NULL) - || rv != fi.nFileSizeLow) - return false; - - if (fi.nFileSizeLow > sizeof (file_header) - && cmp_shortcut_header (file_header)) - { - cp = buf + sizeof (win_shortcut_hdr); - if (file_header->flags & WSH_FLAG_IDLIST) /* Skip ITEMIDLIST */ - cp += *(unsigned short *) cp + 2; - if (!(len = *(unsigned short *) cp)) - return false; - cp += 2; - /* Has appended full path? If so, use it instead of description. */ - unsigned short relpath_len = *(unsigned short *) (cp + len); - if (cp + len + 2 + relpath_len < buf + fi.nFileSizeLow) - { - cp += len + 2 + relpath_len; - len = *(unsigned short *) cp; - cp += 2; - } - if (*(PWCHAR) cp == 0xfeff) /* BOM */ - { - len = wcstombs (NULL, (wchar_t *) (cp + 2), 0); - if (len == (size_t) -1 || len + 1 > maxlen) - return false; - wcstombs (path, (wchar_t *) (cp + 2), len + 1); - } - else if (len + 1 > maxlen) - return false; - else - memcpy (path, cp, len); - path[len] = '\0'; - return true; - } - else if (strncmp (buf, SYMLINK_COOKIE, strlen (SYMLINK_COOKIE)) == 0 - && buf[fi.nFileSizeLow - 1] == '\0') - { - cp = buf + strlen (SYMLINK_COOKIE); - if (*(PWCHAR) cp == 0xfeff) /* BOM */ - { - len = wcstombs (NULL, (wchar_t *) (cp + 2), 0); - if (len == (size_t) -1 || len + 1 > maxlen) - return false; - wcstombs (path, (wchar_t *) (cp + 2), len + 1); - } - else if (fi.nFileSizeLow - strlen (SYMLINK_COOKIE) > (unsigned) maxlen) - return false; - else - strcpy (path, cp); - return true; - } - else - return false; -} -#endif /* !FSTAB_ONLY */ - -#ifndef TESTSUITE -mnt_t mount_table[255]; -int max_mount_entry; -#else -# define TESTSUITE_MOUNT_TABLE -# include "testsuite.h" -# undef TESTSUITE_MOUNT_TABLE -#endif - -inline void -unconvert_slashes (char* name) -{ - while ((name = strchr (name, '/')) != NULL) - *name++ = '\\'; -} - -/* These functions aren't called when defined(TESTSUITE) which results - in a compiler warning. */ -#ifndef TESTSUITE -inline char * -skip_ws (char *in) -{ - while (*in == ' ' || *in == '\t') - ++in; - return in; -} - -inline char * -find_ws (char *in) -{ - while (*in && *in != ' ' && *in != '\t') - ++in; - return in; -} - -inline char * -conv_fstab_spaces (char *field) -{ - register char *sp = field; - while ((sp = strstr (sp, "\\040")) != NULL) - { - *sp++ = ' '; - memmove (sp, sp + 3, strlen (sp + 3) + 1); - } - return field; -} - -#ifndef FSTAB_ONLY -static struct opt -{ - const char *name; - unsigned val; - bool clear; -} oopts[] = -{ - {"acl", MOUNT_NOACL, 1}, - {"auto", 0, 0}, - {"binary", MOUNT_BINARY, 0}, - {"cygexec", MOUNT_CYGWIN_EXEC, 0}, - {"dos", MOUNT_DOS, 0}, - {"exec", MOUNT_EXEC, 0}, - {"ihash", MOUNT_IHASH, 0}, - {"noacl", MOUNT_NOACL, 0}, - {"nosuid", 0, 0}, - {"notexec", MOUNT_NOTEXEC, 0}, - {"nouser", MOUNT_SYSTEM, 0}, - {"override", MOUNT_OVERRIDE, 0}, - {"posix=0", MOUNT_NOPOSIX, 0}, - {"posix=1", MOUNT_NOPOSIX, 1}, - {"text", MOUNT_BINARY, 1}, - {"user", MOUNT_SYSTEM, 1} -}; - -static bool -read_flags (char *options, unsigned &flags) -{ - while (*options) - { - char *p = strchr (options, ','); - if (p) - *p++ = '\0'; - else - p = strchr (options, '\0'); - - for (opt *o = oopts; - o < (oopts + (sizeof (oopts) / sizeof (oopts[0]))); - o++) - if (strcmp (options, o->name) == 0) - { - if (o->clear) - flags &= ~o->val; - else - flags |= o->val; - goto gotit; - } - return false; - - gotit: - options = p; - } - return true; -} -#endif - -bool -from_fstab_line (mnt_t *m, char *line, bool user) -{ - char *native_path, *posix_path, *fs_type; - - /* First field: Native path. */ - char *c = skip_ws (line); - if (!*c || *c == '#') - return false; - char *cend = find_ws (c); - *cend = '\0'; - native_path = conv_fstab_spaces (c); - /* Second field: POSIX path. */ - c = skip_ws (cend + 1); - if (!*c) - return false; - cend = find_ws (c); - *cend = '\0'; - posix_path = conv_fstab_spaces (c); - /* Third field: FS type. */ - c = skip_ws (cend + 1); - if (!*c) - return false; - cend = find_ws (c); - *cend = '\0'; - fs_type = c; - /* Forth field: Flags. */ - c = skip_ws (cend + 1); - if (!*c) - return false; - cend = find_ws (c); - *cend = '\0'; - unsigned mount_flags = MOUNT_SYSTEM; -#ifndef FSTAB_ONLY - if (!read_flags (c, mount_flags)) -#else - if (cygwin_internal (CW_CVT_MNT_OPTS, &c, &mount_flags)) -#endif - return false; - if (user) - mount_flags &= ~MOUNT_SYSTEM; - if (!strcmp (fs_type, "cygdrive")) - { - for (mnt_t *sm = mount_table; sm < m; ++sm) - if (sm->flags & MOUNT_CYGDRIVE) - { - if ((mount_flags & MOUNT_SYSTEM) || !(sm->flags & MOUNT_SYSTEM)) - { - if (sm->posix) - free (sm->posix); - sm->posix = strdup (posix_path); - sm->flags = mount_flags | MOUNT_CYGDRIVE; - } - return false; - } - m->posix = strdup (posix_path); - m->native = strdup ("cygdrive prefix"); - m->flags = mount_flags | MOUNT_CYGDRIVE; - } - else - { - for (mnt_t *sm = mount_table; sm < m; ++sm) - if (!strcmp (sm->posix, posix_path)) - { - /* Don't allow overriding of a system mount with a user mount. */ - if ((sm->flags & MOUNT_SYSTEM) && !(mount_flags & MOUNT_SYSTEM)) - return false; - if ((sm->flags & MOUNT_SYSTEM) != (mount_flags & MOUNT_SYSTEM)) - continue; - /* Changing immutable mount points require the override flag. */ - if ((sm->flags & MOUNT_IMMUTABLE) - && !(mount_flags & MOUNT_OVERRIDE)) - return false; - if (mount_flags & MOUNT_OVERRIDE) - mount_flags |= MOUNT_IMMUTABLE; - if (sm->native) - free (sm->native); - sm->native = strdup (native_path); - sm->flags = mount_flags; - return false; - } - m->posix = strdup (posix_path); - unconvert_slashes (native_path); - m->native = strdup (native_path); - m->flags = mount_flags; - } - return true; -} - -#ifndef FSTAB_ONLY - -#define BUFSIZE 65536 - -static char * -get_user () -{ - static char user[UNLEN + 1]; - char *userenv; - - user[0] = '\0'; - if ((userenv = getenv ("USER")) || (userenv = getenv ("USERNAME"))) - strncat (user, userenv, UNLEN); - return user; -} - -void -from_fstab (bool user, PWCHAR path, PWCHAR path_end) -{ - mnt_t *m = mount_table + max_mount_entry; - char buf[BUFSIZE]; - - if (!user) - { - /* Create a default root dir from path. */ - wcstombs (buf, path, BUFSIZE); - unconvert_slashes (buf); - char *native_path = buf; - if (!strncmp (native_path, "\\\\?\\", 4)) - native_path += 4; - if (!strncmp (native_path, "UNC\\", 4)) - *(native_path += 2) = '\\'; - m->posix = strdup ("/"); - m->native = strdup (native_path); - m->flags = MOUNT_SYSTEM | MOUNT_BINARY | MOUNT_IMMUTABLE - | MOUNT_AUTOMATIC; - ++m; - /* Create default /usr/bin and /usr/lib entries. */ - char *trail = strchr (native_path, '\0'); - strcpy (trail, "\\bin"); - m->posix = strdup ("/usr/bin"); - m->native = strdup (native_path); - m->flags = MOUNT_SYSTEM | MOUNT_BINARY | MOUNT_AUTOMATIC; - ++m; - strcpy (trail, "\\lib"); - m->posix = strdup ("/usr/lib"); - m->native = strdup (native_path); - m->flags = MOUNT_SYSTEM | MOUNT_BINARY | MOUNT_AUTOMATIC; - ++m; - /* Create a default cygdrive entry. Note that this is a user entry. - This allows to override it with mount, unless the sysadmin created - a cygdrive entry in /etc/fstab. */ - m->posix = strdup (CYGWIN_INFO_CYGDRIVE_DEFAULT_PREFIX); - m->native = strdup ("cygdrive prefix"); - m->flags = MOUNT_BINARY | MOUNT_CYGDRIVE; - ++m; - max_mount_entry = m - mount_table; - } - - PWCHAR u = wcscpy (path_end, L"\\etc\\fstab") + 10; - if (user) - mbstowcs (wcscpy (u, L".d\\") + 3, get_user (), BUFSIZE - (u - path)); - HANDLE h = CreateFileW (path, GENERIC_READ, FILE_SHARE_READ, NULL, - OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); - if (h == INVALID_HANDLE_VALUE) - return; - char *got = buf; - DWORD len = 0; - /* Using BUFSIZE-1 leaves space to append two \0. */ - while (ReadFile (h, got, BUFSIZE - 1 - (got - buf), - &len, NULL)) - { - char *end; - - /* Set end marker. */ - got[len] = got[len + 1] = '\0'; - /* Set len to the absolute len of bytes in buf. */ - len += got - buf; - /* Reset got to start reading at the start of the buffer again. */ - got = buf; - while (got < buf + len && (end = strchr (got, '\n'))) - { - end[end[-1] == '\r' ? -1 : 0] = '\0'; - if (from_fstab_line (m, got, user)) - ++m; - got = end + 1; - } - if (len < BUFSIZE - 1) - break; - /* We have to read once more. Move remaining bytes to the start of - the buffer and reposition got so that it points to the end of - the remaining bytes. */ - len = buf + len - got; - memmove (buf, got, len); - got = buf + len; - buf[len] = buf[len + 1] = '\0'; - } - if (got > buf && from_fstab_line (m, got, user)) - ++m; - max_mount_entry = m - mount_table; - CloseHandle (h); -} -#endif /* !FSTAB_ONLY */ -#endif /* !TESTSUITE */ - -#ifndef FSTAB_ONLY - -static int -mnt_sort (const void *a, const void *b) -{ - const mnt_t *ma = (const mnt_t *) a; - const mnt_t *mb = (const mnt_t *) b; - int ret; - - ret = (ma->flags & MOUNT_CYGDRIVE) - (mb->flags & MOUNT_CYGDRIVE); - if (ret) - return ret; - ret = (ma->flags & MOUNT_SYSTEM) - (mb->flags & MOUNT_SYSTEM); - if (ret) - return ret; - return strcmp (ma->posix, mb->posix); -} - -extern "C" WCHAR cygwin_dll_path[]; - -static void -read_mounts () -{ -/* If TESTSUITE is defined, bypass this whole function as a harness - mount table will be provided. */ -#ifndef TESTSUITE - HKEY setup_key; - LONG ret; - DWORD len; - WCHAR path[32768]; - PWCHAR path_end; - - for (mnt_t *m1 = mount_table; m1->posix; m1++) - { - free (m1->posix); - if (m1->native) - free ((char *) m1->native); - m1->posix = NULL; - } - max_mount_entry = 0; - - /* First fetch the cygwin1.dll path from the LoadLibrary call in load_cygwin. - This utilizes the DLL search order to find a matching cygwin1.dll and to - compute the installation path from that DLL's path. */ - if (cygwin_dll_path[0]) - wcscpy (path, cygwin_dll_path); - /* If we can't load cygwin1.dll, check where cygcheck is living itself and - try to fetch installation path from here. Does cygwin1.dll exist in the - same path? This should only kick in if the cygwin1.dll in the same path - has been made non-executable for the current user accidentally. */ - else if (!GetModuleFileNameW (NULL, path, 32768)) - return; - path_end = wcsrchr (path, L'\\'); - if (path_end) - { - if (!cygwin_dll_path[0]) - { - wcscpy (path_end, L"\\cygwin1.dll"); - DWORD attr = GetFileAttributesW (path); - if (attr == (DWORD) -1 - || (attr & (FILE_ATTRIBUTE_DIRECTORY - | FILE_ATTRIBUTE_REPARSE_POINT))) - path_end = NULL; - } - if (path_end) - { - *path_end = L'\0'; - path_end = wcsrchr (path, L'\\'); - } - } - /* If we can't create a valid installation dir from that, try to fetch - the installation dir from the setup registry key. */ - if (!path_end) - { - for (int i = 0; i < 2; ++i) - if ((ret = RegOpenKeyExW (i ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER, - L"Software\\Cygwin\\setup", 0, - KEY_READ, &setup_key)) == ERROR_SUCCESS) - { - len = 32768 * sizeof (WCHAR); - ret = RegQueryValueExW (setup_key, L"rootdir", NULL, NULL, - (PBYTE) path, &len); - RegCloseKey (setup_key); - if (ret == ERROR_SUCCESS) - break; - } - if (ret == ERROR_SUCCESS) - path_end = wcschr (path, L'\0'); - } - /* If we can't fetch an installation dir, bail out. */ - if (!path_end) - return; - *path_end = L'\0'; - - from_fstab (false, path, path_end); - from_fstab (true, path, path_end); - qsort (mount_table, max_mount_entry, sizeof (mnt_t), mnt_sort); -#endif /* !defined(TESTSUITE) */ -} - -/* Return non-zero if PATH1 is a prefix of PATH2. - Both are assumed to be of the same path style and / vs \ usage. - Neither may be "". - LEN1 = strlen (PATH1). It's passed because often it's already known. - - Examples: - /foo/ is a prefix of /foo <-- may seem odd, but desired - /foo is a prefix of /foo/ - / is a prefix of /foo/bar - / is not a prefix of foo/bar - foo/ is a prefix foo/bar - /foo is not a prefix of /foobar -*/ - -static int -path_prefix_p (const char *path1, const char *path2, int len1) -{ - /* Handle case where PATH1 has trailing '/' and when it doesn't. */ - if (len1 > 0 && isslash (path1[len1 - 1])) - len1--; - - if (len1 == 0) - return isslash (path2[0]) && !isslash (path2[1]); - - if (strncasecmp (path1, path2, len1) != 0) - return 0; - - return isslash (path2[len1]) || path2[len1] == 0 || path1[len1 - 1] == ':'; -} - -static char * -vconcat (const char *s, va_list v) -{ - int len; - char *rv, *arg; - va_list save_v = v; - int unc; - - if (!s) - return 0; - - len = strlen (s); - - unc = isslash (*s) && isslash (s[1]); - - while (1) - { - arg = va_arg (v, char *); - if (arg == 0) - break; - len += strlen (arg); - } - va_end (v); - - rv = (char *) malloc (len + 1); - strcpy (rv, s); - v = save_v; - while (1) - { - arg = va_arg (v, char *); - if (arg == 0) - break; - strcat (rv, arg); - } - va_end (v); - - char *d, *p; - - /* concat is only used for urls and files, so we can safely - canonicalize the results */ - for (p = d = rv; *p; p++) - { - *d++ = *p; - /* special case for URLs */ - if (*p == ':' && p[1] == '/' && p[2] == '/' && p > rv + 1) - { - *d++ = *++p; - *d++ = *++p; - } - else if (isslash (*p)) - { - if (p == rv && unc) - *d++ = *p++; - while (p[1] == '/') - p++; - } - } - *d = 0; - - return rv; -} - -static char * -concat (const char *s, ...) -{ - va_list v; - - va_start (v, s); - - return vconcat (s, v); -} - -/* This is a helper function for when vcygpath is passed what appears - to be a relative POSIX path. We take a Win32 CWD (either as specified - in 'cwd' or as retrieved with GetCurrentDirectory() if 'cwd' is NULL) - and find the mount table entry with the longest match. We replace the - matching portion with the corresponding POSIX prefix, and to that append - 's' and anything in 'v'. The returned result is a mostly-POSIX - absolute path -- 'mostly' because the portions of CWD that didn't - match the mount prefix will still have '\\' separators. */ -static char * -rel_vconcat (const char *cwd, const char *s, va_list v) -{ - char pathbuf[MAX_PATH]; - if (!cwd || *cwd == '\0') - { - if (!GetCurrentDirectory (MAX_PATH, pathbuf)) - return NULL; - cwd = pathbuf; - } - - int max_len = -1; - mnt_t *m, *match = NULL; - - for (m = mount_table; m->posix; m++) - { - if (m->flags & MOUNT_CYGDRIVE) - continue; - - int n = strlen (m->native); - if (n < max_len || !path_prefix_p (m->native, cwd, n)) - continue; - max_len = n; - match = m; - } - - char *temppath; - if (!match) - // No prefix matched - best effort to return meaningful value. - temppath = concat (cwd, "/", s, NULL); - else if (strcmp (match->posix, "/") != 0) - // Matched on non-root. Copy matching prefix + remaining 'path'. - temppath = concat (match->posix, cwd + max_len, "/", s, NULL); - else if (cwd[max_len] == '\0') - // Matched on root and there's no remaining 'path'. - temppath = concat ("/", s, NULL); - else if (isslash (cwd[max_len])) - // Matched on root but remaining 'path' starts with a slash anyway. - temppath = concat (cwd + max_len, "/", s, NULL); - else - temppath = concat ("/", cwd + max_len, "/", s, NULL); - - char *res = vconcat (temppath, v); - free (temppath); - return res; -} - -/* Convert a POSIX path in 's' to an absolute Win32 path, and append - anything in 'v' to the end, returning the result. If 's' is a - relative path then 'cwd' is used as the working directory to make - it absolute. Pass NULL in 'cwd' to use GetCurrentDirectory. */ -static char * -vcygpath (const char *cwd, const char *s, va_list v) -{ - int max_len = -1; - mnt_t *m, *match = NULL; - - if (!max_mount_entry) - read_mounts (); - char *path; - if (s[0] == '.' && isslash (s[1])) - s += 2; - - if (s[0] == '/' || s[1] == ':') /* FIXME: too crude? */ - path = vconcat (s, v); - else - path = rel_vconcat (cwd, s, v); - - if (!path) - return NULL; - - if (strncmp (path, "/./", 3) == 0) - memmove (path + 1, path + 3, strlen (path + 3) + 1); - - for (m = mount_table; m->posix; m++) - { - if (m->flags & MOUNT_CYGDRIVE) - continue; - - int n = strlen (m->posix); - if (n < max_len || !path_prefix_p (m->posix, path, n)) - continue; - max_len = n; - match = m; - } - - char *native; - if (match == NULL) - native = strdup (path); - else if (max_len == (int) strlen (path)) - native = strdup (match->native); - else if (isslash (path[max_len])) - native = concat (match->native, path + max_len, NULL); - else - native = concat (match->native, "\\", path + max_len, NULL); - free (path); - - unconvert_slashes (native); - for (char *s = strstr (native + 1, "\\.\\"); s && *s; s = strstr (s, "\\.\\")) - memmove (s + 1, s + 3, strlen (s + 3) + 1); - return native; -} - -char * -cygpath_rel (const char *cwd, const char *s, ...) -{ - va_list v; - - va_start (v, s); - - return vcygpath (cwd, s, v); -} - -char * -cygpath (const char *s, ...) -{ - va_list v; - - va_start (v, s); - - return vcygpath (NULL, s, v); -} - -static mnt_t *m = NULL; - -extern "C" FILE * -setmntent (const char *, const char *) -{ - m = mount_table; - if (!max_mount_entry) - read_mounts (); - return NULL; -} - -extern "C" struct mntent * -getmntent (FILE *) -{ - static mntent mnt; - if (!m->posix) - return NULL; - - mnt.mnt_fsname = (char *) m->native; - mnt.mnt_dir = (char *) m->posix; - if (!mnt.mnt_type) - mnt.mnt_type = (char *) malloc (16); - if (!mnt.mnt_opts) - mnt.mnt_opts = (char *) malloc (64); - - strcpy (mnt.mnt_type, (char *) (m->flags & MOUNT_SYSTEM) ? "system" : "user"); - - if (!(m->flags & MOUNT_BINARY)) - strcpy (mnt.mnt_opts, (char *) "text"); - else - strcpy (mnt.mnt_opts, (char *) "binary"); - - if (m->flags & MOUNT_CYGWIN_EXEC) - strcat (mnt.mnt_opts, (char *) ",cygexec"); - else if (m->flags & MOUNT_EXEC) - strcat (mnt.mnt_opts, (char *) ",exec"); - else if (m->flags & MOUNT_NOTEXEC) - strcat (mnt.mnt_opts, (char *) ",notexec"); - - if (m->flags & MOUNT_NOACL) - strcat (mnt.mnt_opts, (char *) ",noacl"); - - if (m->flags & MOUNT_NOPOSIX) - strcat (mnt.mnt_opts, (char *) ",posix=0"); - - if (m->flags & (MOUNT_AUTOMATIC | MOUNT_CYGDRIVE)) - strcat (mnt.mnt_opts, (char *) ",auto"); - - mnt.mnt_freq = 1; - mnt.mnt_passno = 1; - m++; - return &mnt; -} - -#endif /* !FSTAB_ONLY */ |