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Properly handle Win32 paths of 'E:abc', which can be either absolute or

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relative, by creating a function path_is_relative_and_below_cwd() to
check for specific requirements.  It is unclear if this fixes a security
problem or not but the new code is more robust.
This commit is contained in:
Bruce Momjian
2011-02-12 09:47:51 -05:00
parent b313bca0af
commit 0de0cc150a
4 changed files with 73 additions and 48 deletions
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9
src/include/port.h
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@@ -42,6 +42,7 @@ extern void join_path_components(char *ret_path,
extern void canonicalize_path(char *path);
extern void make_native_path(char *path);
extern bool path_contains_parent_reference(const char *path);
extern bool path_is_relative_and_below_cwd(const char *path);
extern bool path_is_prefix_of_path(const char *path1, const char *path2);
extern const char *get_progname(const char *argv0);
extern void get_share_path(const char *my_exec_path, char *ret_path);
@@ -77,13 +78,7 @@ extern void pgfnames_cleanup(char **filenames);
#else
#define IS_DIR_SEP(ch) ((ch) == '/' || (ch) == '\\')
/*
* On Win32, a drive letter _not_ followed by a slash, e.g. 'E:abc', is
* relative to the cwd on that drive, or the drive's root directory
* if that drive has no cwd. Because the path itself cannot tell us
* which is the case, we have to assume the worst, i.e. that it is not
* absolute; this check is done by IS_DIR_SEP(filename[2]).
*/
/* See path_is_relative_and_below_cwd() for how we handle 'E:abc'. */
#define is_absolute_path(filename) \
( \
IS_DIR_SEP((filename)[0]) || \