Code cleanup in path.c and exec.c. Handle Windows drive and network specs
everywhere not just some places, get rid of . and .. when joining path sections together. This should eliminate most of the ugly paths like /foo/bar/./baz that we've been generating.
This commit is contained in:
Tom Lane
parent
3d6e538edf
commit
4867afef7a
@ -1,12 +1,12 @@
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/*-------------------------------------------------------------------------
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*
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* port.h
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* Header for /port compatibility functions.
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* Header for src/port/ compatibility functions.
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*
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* Portions Copyright (c) 1996-2004, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/port.h,v 1.64 2004/10/11 22:50:33 momjian Exp $
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* $PostgreSQL: pgsql/src/include/port.h,v 1.65 2004/11/06 01:16:14 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -20,25 +20,15 @@
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#include <ctype.h>
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/* non-blocking */
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bool set_noblock(int sock);
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extern bool set_noblock(int sock);
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/* Portable path handling for Unix/Win32 */
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/* Find the location of the first directory separator, return
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* NULL if not found.
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*/
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extern char *first_dir_separator(const char *filename);
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/* Find the location of the last directory separator, return
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* NULL if not found.
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*/
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extern char *last_dir_separator(const char *filename);
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/* Find the location of the first path separator (i.e. ':' on
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* Unix, ';' on Windows), return NULL if not found.
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*/
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extern char *first_path_separator(const char *filename);
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extern char *first_path_separator(const char *pathlist);
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extern void join_path_components(char *ret_path,
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const char *head, const char *tail);
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extern void canonicalize_path(char *path);
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extern void make_native_path(char *path);
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extern const char *get_progname(const char *argv0);
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@ -123,11 +113,6 @@ extern unsigned char pg_tolower(unsigned char ch);
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/* Portable prompt handling */
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extern char *simple_prompt(const char *prompt, int maxlen, bool echo);
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#if defined(bsdi) || defined(netbsd)
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extern int fseeko(FILE *stream, off_t offset, int whence);
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extern off_t ftello(FILE *stream);
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#endif
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/*
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* WIN32 doesn't allow descriptors returned by pipe() to be used in select(),
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* so for that platform we use socket() instead of pipe().
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@ -185,7 +170,7 @@ extern int pgsymlink(const char *oldpath, const char *newpath);
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#define symlink(oldpath, newpath) pgsymlink(oldpath, newpath)
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#endif
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#endif
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#endif /* defined(WIN32) || defined(__CYGWIN__) */
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extern bool rmtree(char *path, bool rmtopdir);
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@ -212,14 +197,14 @@ extern void srand48(long seed);
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/* Last parameter not used */
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extern int gettimeofday(struct timeval * tp, struct timezone * tzp);
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#else
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#else /* !WIN32 */
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/*
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* Win32 requires a special close for sockets and pipes, while on Unix
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* close() does them all.
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*/
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#define closesocket close
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#endif
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#endif /* WIN32 */
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/*
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* Default "extern" declarations or macro substitutes for library routines.
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@ -229,6 +214,11 @@ extern int gettimeofday(struct timeval * tp, struct timezone * tzp);
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extern char *crypt(const char *key, const char *setting);
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#endif
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#if defined(bsdi) || defined(netbsd)
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extern int fseeko(FILE *stream, off_t offset, int whence);
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extern off_t ftello(FILE *stream);
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#endif
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#ifndef HAVE_FSEEKO
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#define fseeko(a, b, c) fseek((a), (b), (c))
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#define ftello(a) ftell((a))
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118
src/port/exec.c
118
src/port/exec.c
@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/port/exec.c,v 1.30 2004/10/18 19:08:58 momjian Exp $
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* $PostgreSQL: pgsql/src/port/exec.c,v 1.31 2004/11/06 01:16:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -42,15 +42,12 @@
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#ifndef FRONTEND
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/* We use only 3-parameter elog calls in this file, for simplicity */
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#define log_error(str, param) elog(LOG, (str), (param))
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#define log_error(str, param) elog(LOG, str, param)
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#else
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#define log_error(str, param) fprintf(stderr, (str), (param))
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#define log_error(str, param) (fprintf(stderr, str, param), fputc('\n', stderr))
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#endif
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static void win32_make_absolute(char *path);
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/*
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* validate_exec -- validate "path" as an executable file
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*
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@ -165,7 +162,7 @@ validate_exec(const char *path)
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* executable's location. Also, we need a full path not a relative
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* path because we will later change working directory.
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*
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* This function is not thread-safe because of it calls validate_exec(),
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* This function is not thread-safe because it calls validate_exec(),
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* which calls getgrgid(). This function should be used only in
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* non-threaded binaries, not in library routines.
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*/
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@ -178,61 +175,40 @@ find_my_exec(const char *argv0, char *retpath)
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#ifndef WIN32_CLIENT_ONLY
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if (!getcwd(cwd, MAXPGPATH))
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strcpy(cwd, "."); /* cheesy, but better than nothing */
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#else
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if (!GetCurrentDirectory(MAXPGPATH, cwd))
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strcpy(cwd, "."); /* cheesy, but better than nothing */
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#endif
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cwd[0] = '\0';
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/*
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* First try: use the binary that's located in the same directory if
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* it was invoked with an explicit path. Presumably the user used an
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* explicit path because it wasn't in PATH, and we don't want to use
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* incompatible executables.
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*
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* For the binary: First try: if we're given some kind of path, use it
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* (making sure that a relative path is made absolute before returning
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* it).
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* If argv0 contains a separator, then PATH wasn't used.
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*/
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/* Does argv0 have a separator? */
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if ((path = last_dir_separator(argv0)))
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if (first_dir_separator(argv0) != NULL)
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{
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if (*++path == '\0')
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{
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log_error("argv[0] ends with a path separator \"%s\"", argv0);
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return -1;
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}
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if (is_absolute_path(argv0))
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StrNCpy(retpath, argv0, MAXPGPATH);
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else
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snprintf(retpath, MAXPGPATH, "%s/%s", cwd, argv0);
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join_path_components(retpath, cwd, argv0);
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canonicalize_path(retpath);
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if (validate_exec(retpath) == 0)
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{
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win32_make_absolute(retpath);
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return 0;
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}
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else
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{
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log_error("invalid binary \"%s\"", retpath);
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return -1;
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}
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log_error("invalid binary \"%s\"", retpath);
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return -1;
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}
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#ifdef WIN32
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/* Win32 checks the current directory first for names without slashes */
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if (validate_exec(argv0) == 0)
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{
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snprintf(retpath, MAXPGPATH, "%s/%s", cwd, argv0);
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win32_make_absolute(retpath);
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join_path_components(retpath, cwd, argv0);
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if (validate_exec(retpath) == 0)
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return 0;
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}
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#endif
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/*
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* Second try: since no explicit path was supplied, the user must have
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* been relying on PATH. We'll use the same PATH.
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* Since no explicit path was supplied, the user must have
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* been relying on PATH. We'll search the same PATH.
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*/
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if ((path = getenv("PATH")) && *path)
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{
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@ -253,40 +229,33 @@ find_my_exec(const char *argv0, char *retpath)
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StrNCpy(test_path, startp, Min(endp - startp + 1, MAXPGPATH));
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if (is_absolute_path(test_path))
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snprintf(retpath, MAXPGPATH, "%s/%s", test_path, argv0);
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join_path_components(retpath, test_path, argv0);
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else
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snprintf(retpath, MAXPGPATH, "%s/%s/%s", cwd, test_path, argv0);
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{
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join_path_components(retpath, cwd, test_path);
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join_path_components(retpath, retpath, argv0);
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}
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canonicalize_path(retpath);
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switch (validate_exec(retpath))
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{
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case 0: /* found ok */
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win32_make_absolute(retpath);
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case 0: /* found ok */
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return 0;
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case -1: /* wasn't even a candidate, keep looking */
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continue;
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break;
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case -2: /* found but disqualified */
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log_error("could not read binary \"%s\"", retpath);
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continue;
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break;
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}
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} while (*endp);
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}
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log_error("could not find a \"%s\" to execute", argv0);
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return -1;
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#if NOT_USED
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/*
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* Win32 has a native way to find the executable name, but the above
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* method works too.
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*/
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if (GetModuleFileName(NULL, retpath, MAXPGPATH) == 0)
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log_error("GetModuleFileName failed (%i)", (int) GetLastError());
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#endif
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}
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/*
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* The runtime librarys popen() on win32 does not work when being
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* The runtime library's popen() on win32 does not work when being
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* called from a service when running on windows <= 2000, because
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* there is no stdin/stdout/stderr.
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*
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@ -427,10 +396,9 @@ pipe_read_line(char *cmd, char *line, int maxsize)
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}
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/*
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* Find our binary directory, then make sure the "target" executable
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* is the proper version.
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* Find another program in our binary's directory,
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* then make sure it is the proper version.
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*/
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int
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find_other_exec(const char *argv0, const char *target,
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@ -487,41 +455,19 @@ pclose_check(FILE *stream)
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}
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else if (WIFEXITED(exitstatus))
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{
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log_error(_("child process exited with exit code %d\n"),
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log_error(_("child process exited with exit code %d"),
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WEXITSTATUS(exitstatus));
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}
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else if (WIFSIGNALED(exitstatus))
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{
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log_error(_("child process was terminated by signal %d\n"),
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log_error(_("child process was terminated by signal %d"),
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WTERMSIG(exitstatus));
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}
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else
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{
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log_error(_("child process exited with unrecognized status %d\n"),
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log_error(_("child process exited with unrecognized status %d"),
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exitstatus);
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}
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return -1;
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}
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/*
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* Windows doesn't like relative paths to executables (other things work fine)
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* so we call its builtin function to expand them. Elsewhere this is a NOOP
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*/
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static void
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win32_make_absolute(char *path)
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{
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#ifdef WIN32
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char abspath[MAXPGPATH];
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if (_fullpath(abspath, path, MAXPGPATH) == NULL)
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{
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log_error("Win32 path expansion failed: %s", strerror(errno));
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StrNCpy(abspath, path, MAXPGPATH);
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}
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canonicalize_path(abspath);
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StrNCpy(path, abspath, MAXPGPATH);
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#endif
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}
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186
src/port/path.c
186
src/port/path.c
@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/port/path.c,v 1.41 2004/11/02 03:09:06 momjian Exp $
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* $PostgreSQL: pgsql/src/port/path.c,v 1.42 2004/11/06 01:16:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -44,53 +44,95 @@ static void trim_trailing_separator(char *path);
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(p)++; \
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}
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/*
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* skip_drive
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*
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* On Windows, a path may begin with "C:" or "//network/". Advance over
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* this and point to the effective start of the path.
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*/
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#ifdef WIN32
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static char *
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skip_drive(const char *path)
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{
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if (IS_DIR_SEP(path[0]) && IS_DIR_SEP(path[1]))
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{
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path += 2;
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while (*path && !IS_DIR_SEP(*path))
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path++;
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}
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else if (isalpha(path[0]) && path[1] == ':')
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{
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path += 2;
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}
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return (char *) path;
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}
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#else
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#define skip_drive(path) (path)
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#endif
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/*
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* first_dir_separator
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*
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* Find the location of the first directory separator, return
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* NULL if not found.
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*/
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char *
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first_dir_separator(const char *filename)
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{
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char *p;
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const char *p;
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for (p = (char *) filename; *p; p++)
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for (p = skip_drive(filename); *p; p++)
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if (IS_DIR_SEP(*p))
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return p;
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return (char *) p;
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return NULL;
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}
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/*
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* first_path_separator
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*
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* Find the location of the first path separator (i.e. ':' on
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* Unix, ';' on Windows), return NULL if not found.
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*/
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char *
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first_path_separator(const char *filename)
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first_path_separator(const char *pathlist)
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{
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char *p;
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const char *p;
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for (p = (char *) filename; *p; p++)
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/* skip_drive is not needed */
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for (p = pathlist; *p; p++)
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if (IS_PATH_SEP(*p))
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return p;
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return (char *) p;
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return NULL;
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}
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/*
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* last_dir_separator
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*
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* Find the location of the last directory separator, return
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* NULL if not found.
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*/
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char *
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last_dir_separator(const char *filename)
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{
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char *p,
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const char *p,
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*ret = NULL;
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for (p = (char *) filename; *p; p++)
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for (p = skip_drive(filename); *p; p++)
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if (IS_DIR_SEP(*p))
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ret = p;
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return ret;
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return (char *) ret;
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}
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/*
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* make_native_path - on WIN32, change / to \ in the path
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*
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* This effectively undoes canonicalize_path.
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*
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* This is required because WIN32 COPY is an internal CMD.EXE
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* command and doesn't process forward slashes in the same way
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* as external commands. Quoting the first argument to COPY
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@ -114,11 +156,59 @@ make_native_path(char *filename)
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}
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/*
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* join_path_components - join two path components, inserting a slash
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*
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* ret_path is the output area (must be of size MAXPGPATH)
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*
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* ret_path can be the same as head, but not the same as tail.
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*/
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void
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join_path_components(char *ret_path,
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const char *head, const char *tail)
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{
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if (ret_path != head)
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StrNCpy(ret_path, head, MAXPGPATH);
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/*
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* Remove any leading "." and ".." in the tail component,
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* adjusting head as needed.
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*/
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for (;;)
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{
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if (tail[0] == '.' && IS_DIR_SEP(tail[1]))
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{
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tail += 2;
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}
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else if (tail[0] == '.' && tail[1] == '\0')
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{
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tail += 1;
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break;
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}
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else if (tail[0] == '.' && tail[1] == '.' && IS_DIR_SEP(tail[2]))
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{
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trim_directory(ret_path);
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tail += 3;
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}
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else if (tail[0] == '.' && tail[1] == '.' && tail[2] == '\0')
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{
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trim_directory(ret_path);
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tail += 2;
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break;
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}
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else
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break;
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}
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if (*tail)
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snprintf(ret_path + strlen(ret_path), MAXPGPATH - strlen(ret_path),
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"/%s", tail);
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}
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/*
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* Clean up path by:
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* o make Win32 path use Unix slashes
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* o remove trailling quote on Win32
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* o remove trailling slash
|
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* o remove trailing quote on Win32
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* o remove trailing slash
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* o remove trailing '.'
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* o process trailing '..' ourselves
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*/
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@ -165,13 +255,11 @@ canonicalize_path(char *path)
|
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if (len >= 2 && strcmp(path + len - 2, "/.") == 0)
|
||||
{
|
||||
trim_directory(path);
|
||||
trim_trailing_separator(path);
|
||||
}
|
||||
else if (len >= 3 && strcmp(path + len - 3, "/..") == 0)
|
||||
{
|
||||
trim_directory(path);
|
||||
trim_directory(path); /* remove directory above */
|
||||
trim_trailing_separator(path);
|
||||
}
|
||||
else
|
||||
break;
|
||||
@ -188,10 +276,11 @@ get_progname(const char *argv0)
|
||||
{
|
||||
const char *nodir_name;
|
||||
|
||||
if (!last_dir_separator(argv0))
|
||||
nodir_name = argv0;
|
||||
nodir_name = last_dir_separator(argv0);
|
||||
if (nodir_name)
|
||||
nodir_name++;
|
||||
else
|
||||
nodir_name = last_dir_separator(argv0) + 1;
|
||||
nodir_name = skip_drive(argv0);
|
||||
|
||||
#if defined(__CYGWIN__) || defined(WIN32)
|
||||
/* strip .exe suffix, regardless of case */
|
||||
@ -231,7 +320,6 @@ get_share_path(const char *my_exec_path, char *ret_path)
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* get_etc_path
|
||||
*/
|
||||
@ -248,7 +336,6 @@ get_etc_path(const char *my_exec_path, char *ret_path)
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* get_include_path
|
||||
*/
|
||||
@ -265,7 +352,6 @@ get_include_path(const char *my_exec_path, char *ret_path)
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* get_pkginclude_path
|
||||
*/
|
||||
@ -282,7 +368,6 @@ get_pkginclude_path(const char *my_exec_path, char *ret_path)
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* get_includeserver_path
|
||||
*/
|
||||
@ -299,7 +384,6 @@ get_includeserver_path(const char *my_exec_path, char *ret_path)
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* get_lib_path
|
||||
*/
|
||||
@ -316,7 +400,6 @@ get_lib_path(const char *my_exec_path, char *ret_path)
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* get_pkglib_path
|
||||
*/
|
||||
@ -333,7 +416,6 @@ get_pkglib_path(const char *my_exec_path, char *ret_path)
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* get_locale_path
|
||||
*
|
||||
@ -382,7 +464,6 @@ void
|
||||
get_parent_directory(char *path)
|
||||
{
|
||||
trim_directory(path);
|
||||
trim_trailing_separator(path);
|
||||
}
|
||||
|
||||
|
||||
@ -436,6 +517,8 @@ set_pglocale_pgservice(const char *argv0, const char *app)
|
||||
|
||||
/*
|
||||
* make_relative - adjust path to be relative to bin/
|
||||
*
|
||||
* ret_path is the output area (must be of size MAXPGPATH)
|
||||
*/
|
||||
static void
|
||||
make_relative(const char *my_exec_path, const char *p, char *ret_path)
|
||||
@ -443,9 +526,9 @@ make_relative(const char *my_exec_path, const char *p, char *ret_path)
|
||||
char path[MAXPGPATH];
|
||||
|
||||
StrNCpy(path, my_exec_path, MAXPGPATH);
|
||||
trim_directory(path);
|
||||
trim_directory(path);
|
||||
snprintf(ret_path, MAXPGPATH, "%s/%s", path, p);
|
||||
trim_directory(path); /* remove my executable name */
|
||||
trim_directory(path); /* remove last directory component (/bin) */
|
||||
join_path_components(ret_path, path, p);
|
||||
}
|
||||
|
||||
|
||||
@ -520,57 +603,48 @@ relative_path(const char *bin_path, const char *other_path)
|
||||
/*
|
||||
* trim_directory
|
||||
*
|
||||
* Trim trailing directory from path
|
||||
* Trim trailing directory from path, that is, remove any trailing slashes,
|
||||
* the last pathname component, and the slash just ahead of it --- but never
|
||||
* remove a leading slash.
|
||||
*/
|
||||
static void
|
||||
trim_directory(char *path)
|
||||
{
|
||||
char *p;
|
||||
|
||||
path = skip_drive(path);
|
||||
|
||||
if (path[0] == '\0')
|
||||
return;
|
||||
|
||||
/* back up over trailing slash(es) */
|
||||
for (p = path + strlen(path) - 1; IS_DIR_SEP(*p) && p > path; p--)
|
||||
;
|
||||
/* back up over directory name */
|
||||
for (; !IS_DIR_SEP(*p) && p > path; p--)
|
||||
;
|
||||
/* if multiple slashes before directory name, remove 'em all */
|
||||
for (; p > path && IS_DIR_SEP(*(p - 1)); p--)
|
||||
;
|
||||
/* don't erase a leading slash */
|
||||
if (p == path && IS_DIR_SEP(*p))
|
||||
p++;
|
||||
*p = '\0';
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* trim_trailing_separator
|
||||
*
|
||||
* trim off trailing slashes, but not a leading slash
|
||||
*/
|
||||
static void
|
||||
trim_trailing_separator(char *path)
|
||||
{
|
||||
char *p = path + strlen(path);
|
||||
char *p;
|
||||
|
||||
#ifdef WIN32
|
||||
|
||||
/*
|
||||
* Skip over network and drive specifiers for win32. Set 'path' to
|
||||
* point to the last character we must keep.
|
||||
*/
|
||||
if (strlen(path) >= 2)
|
||||
{
|
||||
if (IS_DIR_SEP(path[0]) && IS_DIR_SEP(path[1]))
|
||||
{
|
||||
path += 2;
|
||||
while (*path && !IS_DIR_SEP(*path))
|
||||
path++;
|
||||
}
|
||||
else if (isalpha(path[0]) && path[1] == ':')
|
||||
{
|
||||
path++;
|
||||
if (IS_DIR_SEP(path[1]))
|
||||
path++;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
/* trim off trailing slashes */
|
||||
path = skip_drive(path);
|
||||
p = path + strlen(path);
|
||||
if (p > path)
|
||||
for (p--; p > path && IS_DIR_SEP(*p); p--)
|
||||
*p = '\0';
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user