X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Ffile-name.c;h=f8ad11d07a342f22fd5bf4cfa026d9a93a412ce0;hb=e1fb96f07a06f3133f54702ed8706493989789fe;hp=dd512c033680fa03c7e612b1e33a84642753f6ea;hpb=3f2ed1c5fe6dc692ca00bb18a15e41617fa2d37d;p=pspp-builds.git diff --git a/src/data/file-name.c b/src/data/file-name.c index dd512c03..f8ad11d0 100644 --- a/src/data/file-name.c +++ b/src/data/file-name.c @@ -1,58 +1,50 @@ -/* PSPP - computes sample statistics. - Copyright (C) 1997-9, 2000, 2006 Free Software Foundation, Inc. - Written by Ben Pfaff . +/* PSPP - a program for statistical analysis. + Copyright (C) 1997-9, 2000, 2006, 2007 Free Software Foundation, Inc. - This program is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - 02110-1301, USA. */ + along with this program. If not, see . */ #include -#include -#include "file-name.h" -#include -#include + +#include + #include #include -#include +#include +#include +#include +#include + #include "intprops.h" +#include "minmax.h" +#include "dirname.h" + +#include #include +#include #include -#include "settings.h" +#include #include -#include "xreadlink.h" #include "gettext.h" #define _(msgid) gettext (msgid) -/* PORTME: Everything in this file is system dependent. */ - -#ifdef unix -#include #include #include -#include "stat-macros.h" -#endif -#ifdef __WIN32__ -#define NOGDI -#define NOUSER -#define NONLS -#include -#endif - -#if __DJGPP__ -#include +#if defined _WIN32 || defined __WIN32__ +#define WIN32_LEAN_AND_MEAN /* avoid including junk */ +#include #endif /* Initialization. */ @@ -68,416 +60,111 @@ fn_init (void) /* Functions for performing operations on file names. */ -/* Substitutes $variables as defined by GETENV into TARGET. - TARGET must be a string containing the text for which substitution - is required. - Supports $var and ${var} syntaxes; - $$ substitutes as $. -*/ -void -fn_interp_vars (struct string *target, - const char *(*getenv) (const char *)) -{ - char *input ; - char *s ; - - assert (target); - - input = xmalloc(ds_length(target) + 1); - s = input; - - strcpy(input, ds_c_str(target)); - - if (NULL == strchr (ds_c_str(target), '$')) - goto done; - - ds_clear(target); - - for (;;) - { - switch (*s) - { - case '\0': - goto done ; - - case '$': - s++; - - if (*s == '$') - { - ds_putc (target, '$'); - s++; - } - else - { - int stop; - int start; - const char *value; - - start = ds_length (target); - - if (*s == '(') - { - stop = ')'; - s++; - } - else if (*s == '{') - { - stop = '}'; - s++; - } - else - stop = 0; - - while (*s && *s != stop - && (stop || isalpha ((unsigned char) *s))) - { - ds_putc (target, *s++); - } - - value = getenv (ds_c_str (target) + start); - ds_truncate (target, start); - ds_puts (target, value); - - if (stop && *s == stop) - s++; - } - break; - - default: - ds_putc (target, *s++); - } - } - - done: - free(input); - return; -} - -#ifdef unix -/* Expands csh tilde notation from the path INPUT into a malloc()'d - returned string. */ -char * -fn_tilde_expand (const char *input) -{ - struct string output = DS_INITIALIZER; - if (input[0] == '~') - { - const char *home = NULL; - const char *remainder = NULL; - if (input[1] == '/' || input[1] == '\0') - { - home = fn_getenv ("HOME"); - remainder = input + 1; - } - else - { - struct string user_name = DS_INITIALIZER; - struct passwd *pwd; - - ds_assign_buffer (&user_name, input + 1, strcspn (input + 1, "/")); - pwd = getpwnam (ds_c_str (&user_name)); - if (pwd != NULL && pwd->pw_dir[0] != '\0') - { - home = pwd->pw_dir; - remainder = input + 1 + ds_length (&user_name); - } - ds_destroy (&user_name); - } - - if (home != NULL) - { - ds_puts (&output, home); - if (*remainder != '\0') - ds_puts (&output, remainder); - } - } - if (ds_is_empty (&output)) - ds_puts (&output, input); - return ds_c_str (&output); -} -#else /* !unix */ -char * -fn_tilde_expand (const char *input) +/* Substitutes $variables in SRC, putting the result in DST, + properly handling the case where SRC is a substring of DST. + Variables are as defined by GETENV. Supports $var and ${var} + syntaxes; $$ substitutes as $. */ +void +fn_interp_vars (struct substring src, const char *(*getenv) (const char *), + struct string *dst_) { - return xstrdup (input); + struct string dst = DS_EMPTY_INITIALIZER; + int c; + + while ((c = ss_get_char (&src)) != EOF) + if (c != '$') + ds_put_char (&dst, c); + else + { + if (ss_match_char (&src, '$') || ss_is_empty (src)) + ds_put_char (&dst, '$'); + else + { + struct substring var_name; + size_t start; + const char *value; + + if (ss_match_char (&src, '(')) + ss_get_until (&src, ')', &var_name); + else if (ss_match_char (&src, '{')) + ss_get_until (&src, '}', &var_name); + else + ss_get_chars (&src, MAX (1, ss_span (src, ss_cstr (CC_ALNUM))), + &var_name); + + start = ds_length (&dst); + ds_put_substring (&dst, var_name); + value = getenv (ds_cstr (&dst) + start); + ds_truncate (&dst, start); + + ds_put_cstr (&dst, value); + } + } + + ds_swap (&dst, dst_); + ds_destroy (&dst); } -#endif /* !unix */ /* Searches for a configuration file with name NAME in the path - given by PATH, which is tilde- and environment-interpolated. + given by PATH, which is environment-interpolated. Directories in PATH are delimited by ':'. Returns the malloc'd full name of the first file found, or NULL if none is - found. - - If PREFIX is non-NULL, then it is prefixed to each file name; - i.e., it looks like PREFIX/PATH_COMPONENT/NAME. This is not - done with absolute directories in the path. */ + found. */ char * -fn_search_path (const char *base_name, const char *path_, const char *prefix) +fn_search_path (const char *base_name, const char *path_) { struct string path; - struct string dir = DS_INITIALIZER; - struct string file = DS_INITIALIZER; + struct substring dir; + struct string file = DS_EMPTY_INITIALIZER; size_t save_idx = 0; if (fn_is_absolute (base_name)) - return fn_tilde_expand (base_name); + return xstrdup (base_name); /* Interpolate environment variables. */ - ds_create (&path, path_); - fn_interp_vars (&path, fn_getenv); + ds_init_cstr (&path, path_); + fn_interp_vars (ds_ss (&path), fn_getenv, &path); verbose_msg (2, _("searching for \"%s\" in path \"%s\""), - base_name, ds_c_str (&path)); - while (ds_separate (&path, &dir, ":", &save_idx)) + base_name, ds_cstr (&path)); + while (ds_separate (&path, ss_cstr (":"), &save_idx, &dir)) { - /* Do tilde expansion. */ - if (ds_first (&dir) == '~') - { - char *tmp_str = fn_tilde_expand (ds_c_str (&dir)); - ds_assign_c_str (&dir, tmp_str); - free (tmp_str); - } - /* Construct file name. */ ds_clear (&file); - if (prefix != NULL && !fn_is_absolute (ds_c_str (&dir))) - { - ds_puts (&file, prefix); - ds_putc (&file, '/'); - } - ds_puts (&file, ds_c_str (&dir)); - if (ds_length (&dir) && ds_last (&file) != '/') - ds_putc (&file, '/'); - ds_puts (&file, base_name); + ds_put_substring (&file, dir); + if (!ds_is_empty (&file) && !ISSLASH (ds_last (&file))) + ds_put_char (&file, '/'); + ds_put_cstr (&file, base_name); /* Check whether file exists. */ - if (fn_exists (ds_c_str (&file))) + if (fn_exists (ds_cstr (&file))) { - verbose_msg (2, _("...found \"%s\""), ds_c_str (&file)); + verbose_msg (2, _("...found \"%s\""), ds_cstr (&file)); ds_destroy (&path); - ds_destroy (&dir); - return ds_c_str (&file); + return ds_cstr (&file); } } /* Failure. */ verbose_msg (2, _("...not found")); ds_destroy (&path); - ds_destroy (&dir); ds_destroy (&file); return NULL; } -/* fn_normalize(): This very OS-dependent routine canonicalizes - file name FN1. The file name should not need to be the name of an - existing file. Returns a malloc()'d copy of the canonical name. - This function must always succeed; if it needs to bail out then it - should return xstrdup(FN1). */ -#ifdef unix -char * -fn_normalize (const char *file_name) -{ - const char *src; - char *fn1, *fn2, *dest; - int maxlen; - - if (fn_is_special (file_name)) - return xstrdup (file_name); - - fn1 = fn_tilde_expand (file_name); - - /* Follow symbolic links. */ - for (;;) - { - fn2 = fn1; - fn1 = fn_readlink (fn1); - if (!fn1) - { - fn1 = fn2; - break; - } - free (fn2); - } - - maxlen = strlen (fn1) * 2; - if (maxlen < 31) - maxlen = 31; - dest = fn2 = xmalloc (maxlen + 1); - src = fn1; - - if (*src == '/') - *dest++ = *src++; - else - { - errno = 0; - while (getcwd (dest, maxlen - (dest - fn2)) == NULL && errno == ERANGE) - { - maxlen *= 2; - dest = fn2 = xrealloc (fn2, maxlen + 1); - errno = 0; - } - if (errno) - { - free (fn1); - free (fn2); - return NULL; - } - dest = strchr (fn2, '\0'); - if (dest - fn2 >= maxlen) - { - int ofs = dest - fn2; - maxlen *= 2; - fn2 = xrealloc (fn2, maxlen + 1); - dest = fn2 + ofs; - } - if (dest[-1] != '/') - *dest++ = '/'; - } - - for (;;) - { - int c, f; - - c = *src++; - - f = 0; - if (c == '/' || c == 0) - { - /* remove `./', `../' from directory */ - if (dest[-1] == '.' && dest[-2] == '/') - dest--; - else if (dest[-1] == '.' && dest[-2] == '.' && dest[-3] == '/') - { - dest -= 3; - if (dest == fn2) - dest++; - while (dest[-1] != '/') - dest--; - } - else if (dest[-1] != '/') /* remove extra slashes */ - f = 1; - - if (c == 0) - { - if (dest[-1] == '/' && dest > fn2 + 1) - dest--; - *dest = 0; - free (fn1); - - return xrealloc (fn2, strlen (fn2) + 1); - } - } - else - f = 1; - - if (f) - { - if (dest - fn2 >= maxlen) - { - int ofs = dest - fn2; - maxlen *= 2; - fn2 = xrealloc (fn2, maxlen + 1); - dest = fn2 + ofs; - } - *dest++ = c; - } - } -} -#elif defined (__WIN32__) -char * -fn_normalize (const char *fn1) -{ - DWORD len; - DWORD success; - char *fn2; - - /* Don't change special file names. */ - if (is_special_file_name (file_name)) - return xstrdup (file_name); - - /* First find the required buffer length. */ - len = GetFullPathName (fn1, 0, NULL, NULL); - if (!len) - { - fn2 = xstrdup (fn1); - return fn2; - } - - /* Then make a buffer that big. */ - fn2 = xmalloc (len); - success = GetFullPathName (fn1, len, fn2, NULL); - if (success >= len || success == 0) - { - free (fn2); - fn2 = xstrdup (fn1); - return fn2; - } - return fn2; -} -#elif __BORLANDC__ -char * -fn_normalize (const char *fn1) -{ - char *fn2 = _fullpath (NULL, fn1, 0); - if (fn2) - { - char *cp; - for (cp = fn2; *cp; cp++) - *cp = toupper ((unsigned char) (*cp)); - return fn2; - } - return xstrdup (fn1); -} -#elif __DJGPP__ -char * -fn_normalize (const char *fn1) -{ - char *fn2 = xmalloc (1024); - _fixpath (fn1, fn2); - fn2 = xrealloc (fn2, strlen (fn2) + 1); - return fn2; -} -#else /* not Lose32, Unix, or DJGPP */ -char * -fn_normalize (const char *fn) -{ - return xstrdup (fn); -} -#endif /* not Lose32, Unix, or DJGPP */ - /* Returns the directory part of FILE_NAME, as a malloc()'d string. */ char * fn_dir_name (const char *file_name) { - const char *p; - char *s; - size_t len; - - len = strlen (file_name); - if (len == 1 && file_name[0] == '/') - p = file_name + 1; - else if (len && file_name[len - 1] == '/') - p = buf_find_reverse (file_name, len - 1, file_name + len - 1, 1); - else - p = strrchr (file_name, '/'); - if (p == NULL) - p = file_name; - - s = xmalloc (p - file_name + 1); - memcpy (s, file_name, p - file_name); - s[p - file_name] = 0; - - return s; + return dir_name (file_name); } /* Returns the extension part of FILE_NAME as a malloc()'d string. If FILE_NAME does not have an extension, returns an empty string. */ char * -fn_extension (const char *file_name) +fn_extension (const char *file_name) { const char *extension = strrchr (file_name, '.'); if (extension == NULL) @@ -485,106 +172,38 @@ fn_extension (const char *file_name) return xstrdup (extension); } -#if unix -/* Returns the current working directory, as a malloc()'d string. - From libc.info. */ -char * -fn_get_cwd (void) -{ - int size = 100; - char *buffer = xmalloc (size); - - for (;;) - { - char *value = getcwd (buffer, size); - if (value != 0) - return buffer; - - size *= 2; - free (buffer); - buffer = xmalloc (size); - } -} -#else -char * -fn_get_cwd (void) -{ - int size = 2; - char *buffer = xmalloc (size); - if ( buffer) - { - buffer[0]='.'; - buffer[1]='\0'; - } - - return buffer; - -} -#endif - /* Find out information about files. */ -/* Returns nonzero iff NAME specifies an absolute file name. */ -int +/* Returns true iff NAME specifies an absolute file name. */ +bool fn_is_absolute (const char *name) { -#ifdef unix - if (name[0] == '/' - || !strncmp (name, "./", 2) - || !strncmp (name, "../", 3) - || name[0] == '~') - return 1; -#elif defined (__MSDOS__) - if (name[0] == '\\' - || !strncmp (name, ".\\", 2) - || !strncmp (name, "..\\", 3) - || (name[0] && name[1] == ':')) - return 1; -#endif - - return 0; + return IS_ABSOLUTE_FILE_NAME (name); } - -/* Returns 1 if FILE_NAME is a virtual file that doesn't - really exist on disk, 0 if it's a real file name. */ -int + +/* Returns true if FILE_NAME is a virtual file that doesn't + really exist on disk, false if it's a real file name. */ +bool fn_is_special (const char *file_name) { if (!strcmp (file_name, "-") || !strcmp (file_name, "stdin") || !strcmp (file_name, "stdout") || !strcmp (file_name, "stderr") -#ifdef unix +#ifdef HAVE_POPEN || file_name[0] == '|' || (*file_name && file_name[strlen (file_name) - 1] == '|') #endif ) - return 1; + return true; - return 0; + return false; } -/* Returns nonzero if file with name NAME exists. */ -int +/* Returns true if file with name NAME exists. */ +bool fn_exists (const char *name) { -#ifdef unix struct stat temp; - return stat (name, &temp) == 0; -#else - FILE *f = fopen (name, "r"); - if (!f) - return 0; - fclose (f); - return 1; -#endif -} - -/* Returns the symbolic link value for FILE_NAME as a dynamically - allocated buffer, or a null pointer on failure. */ -char * -fn_readlink (const char *file_name) -{ - return xreadlink (file_name, 32); } /* Environment variables. */ @@ -611,6 +230,7 @@ fn_getenv_default (const char *key, const char *def) /* Basic file handling. */ +#if HAVE_POPEN /* Used for giving an error message on a set_safer security violation. */ static FILE * @@ -620,6 +240,7 @@ safety_violation (const char *fn) errno = EPERM; return NULL; } +#endif /* As a general comment on the following routines, a `sensible value' for errno includes 0 if there is no associated system error. The @@ -633,22 +254,22 @@ safety_violation (const char *fn) FILE * fn_open (const char *fn, const char *mode) { - assert (mode[0] == 'r' || mode[0] == 'w'); + assert (mode[0] == 'r' || mode[0] == 'w' || mode[0] == 'a'); - if (mode[0] == 'r' && (!strcmp (fn, "stdin") || !strcmp (fn, "-"))) + if (mode[0] == 'r' && (!strcmp (fn, "stdin") || !strcmp (fn, "-"))) return stdin; else if (mode[0] == 'w' && (!strcmp (fn, "stdout") || !strcmp (fn, "-"))) return stdout; else if (mode[0] == 'w' && !strcmp (fn, "stderr")) return stderr; - -#ifdef unix + +#if HAVE_POPEN if (fn[0] == '|') { if (get_safer_mode ()) return safety_violation (fn); - return popen (&fn[1], mode); + return popen (&fn[1], mode[0] == 'r' ? "r" : "w"); } else if (*fn && fn[strlen (fn) - 1] == '|') { @@ -657,12 +278,12 @@ fn_open (const char *fn, const char *mode) if (get_safer_mode ()) return safety_violation (fn); - + s = local_alloc (strlen (fn)); memcpy (s, fn, strlen (fn) - 1); s[strlen (fn) - 1] = 0; - - f = popen (s, mode); + + f = popen (s, mode[0] == 'r' ? "r" : "w"); local_free (s); @@ -686,9 +307,11 @@ fn_open (const char *fn, const char *mode) int fn_close (const char *fn, FILE *f) { - if (!strcmp (fn, "-")) + if (fileno (f) == STDIN_FILENO + || fileno (f) == STDOUT_FILENO + || fileno (f) == STDERR_FILENO) return 0; -#ifdef unix +#if HAVE_POPEN else if (fn[0] == '|' || (*fn && fn[strlen (fn) - 1] == '|')) { pclose (f); @@ -699,9 +322,33 @@ fn_close (const char *fn, FILE *f) return fclose (f); } -#ifdef unix +/* Creates a new file named FN with the given PERMISSIONS bits, + and returns a stream for it or a null pointer on failure. + MODE should be "w" or "wb". */ +FILE * +create_stream (const char *fn, const char *mode, mode_t permissions) +{ + int fd; + FILE *stream; + + fd = open (fn, O_WRONLY | O_CREAT | O_TRUNC, permissions); + if (fd < 0) + return NULL; + + stream = fdopen (fd, mode); + if (stream == NULL) + { + int save_errno = errno; + close (fd); + errno = save_errno; + } + + return stream; +} + +#if !(defined _WIN32 || defined __WIN32__) /* A file's identity. */ -struct file_identity +struct file_identity { dev_t device; /* Device number. */ ino_t inode; /* Inode number. */ @@ -712,13 +359,13 @@ struct file_identity same file. Returns a null pointer if no information about the file is available, perhaps because it does not exist. The caller is responsible for freeing the structure with - fn_free_identity() when finished. */ + fn_free_identity() when finished. */ struct file_identity * -fn_get_identity (const char *file_name) +fn_get_identity (const char *file_name) { struct stat s; - if (stat (file_name, &s) == 0) + if (stat (file_name, &s) == 0) { struct file_identity *identity = xmalloc (sizeof *identity); identity->device = s.st_dev; @@ -731,7 +378,7 @@ fn_get_identity (const char *file_name) /* Frees IDENTITY obtained from fn_get_identity(). */ void -fn_free_identity (struct file_identity *identity) +fn_free_identity (struct file_identity *identity) { free (identity); } @@ -739,7 +386,7 @@ fn_free_identity (struct file_identity *identity) /* Compares A and B, returning a strcmp()-type result. */ int fn_compare_file_identities (const struct file_identity *a, - const struct file_identity *b) + const struct file_identity *b) { assert (a != NULL); assert (b != NULL); @@ -748,9 +395,9 @@ fn_compare_file_identities (const struct file_identity *a, else return a->inode < b->inode ? -1 : a->inode > b->inode; } -#else /* not unix */ +#else /* Windows */ /* A file's identity. */ -struct file_identity +struct file_identity { char *normalized_file_name; /* File's normalized name. */ }; @@ -760,20 +407,26 @@ struct file_identity same file. Returns a null pointer if no information about the file is available, perhaps because it does not exist. The caller is responsible for freeing the structure with - fn_free_identity() when finished. */ + fn_free_identity() when finished. */ struct file_identity * -fn_get_identity (const char *file_name) +fn_get_identity (const char *file_name) { struct file_identity *identity = xmalloc (sizeof *identity); - identity->normalized_file_name = fn_normalize (file_name); + char cname[PATH_MAX]; + + if (GetFullPathName (file_name, sizeof cname, cname, NULL)) + identity->normalized_file_name = xstrdup (cname); + else + identity->normalized_file_name = xstrdup (file_name); + return identity; } /* Frees IDENTITY obtained from fn_get_identity(). */ void -fn_free_identity (struct file_identity *identity) +fn_free_identity (struct file_identity *identity) { - if (identity != NULL) + if (identity != NULL) { free (identity->normalized_file_name); free (identity); @@ -783,8 +436,8 @@ fn_free_identity (struct file_identity *identity) /* Compares A and B, returning a strcmp()-type result. */ int fn_compare_file_identities (const struct file_identity *a, - const struct file_identity *b) + const struct file_identity *b) { - return strcmp (a->normalized_file_name, b->normalized_file_name); + return strcasecmp (a->normalized_file_name, b->normalized_file_name); } -#endif /* not unix */ +#endif /* Windows */