4cd21deebc
The mingw port used _fullpath() until now, but the behaviour is not exactly the same as realpath()'s on unix; major difference being that it doesn't return an error for non-existing files, which would bypass main's error checking and bail out without any error message. Also realpath() will return forward slashes only since main() relies on that.
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
#include <stdlib.h>
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#include <errno.h>
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#include <io.h>
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#ifndef R_OK
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#define R_OK 4
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#endif
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// Make sure a path only has forward slashes.
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char *to_unix_path(char *p) {
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if (p != NULL) {
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char *pp = p;
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while (*pp != 0) {
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if (*pp == '\\')
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*pp = '/';
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++pp;
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}
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}
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return p;
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}
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// Implement realpath() using _fullpath and make it use the same error codes as realpath() on unix.
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// Also have it return a path with forward slashes only as some code relies on this,
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// but _fullpath() returns backward slashes no matter what.
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char *realpath(const char *path, char *resolved_path) {
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char *ret = NULL;
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if (path == NULL) {
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errno = EINVAL;
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} else if (access(path, R_OK) == 0) {
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ret = resolved_path;
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if (ret == NULL)
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ret = malloc(_MAX_PATH);
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if (ret == NULL) {
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errno = ENOMEM;
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} else {
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ret = _fullpath(ret, path, _MAX_PATH);
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if (ret == NULL)
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errno = EIO;
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}
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}
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return to_unix_path(ret);
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}
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