8 * Convert a relative pathname to an absolute pathname
9 * In the future this might also resolve symlinks...
11 void pm_realpath(com32sys_t *regs)
13 const char *src = MK_PTR(regs->ds, regs->esi.w[0]);
14 char *dst = MK_PTR(regs->es, regs->edi.w[0]);
16 realpath(dst, src, FILENAME_MAX);
25 static size_t join_paths(char *dst, size_t bufsize,
26 const char *s1, const char *s2)
39 for (i = 0; i < 2; i++) {
60 size_t realpath(char *dst, const char *src, size_t bufsize)
62 if (this_fs->fs_ops->realpath) {
63 return this_fs->fs_ops->realpath(this_fs, dst, src, bufsize);
65 /* Filesystems with "common" pathname resolution */
66 return join_paths(dst, bufsize,
67 src[0] == '/' ? "" : this_fs->cwd_name,
72 int chdir(const char *src)
76 char cwd_buf[CURRENTDIR_MAX];
78 if (this_fs->fs_ops->chdir)
79 return this_fs->fs_ops->chdir(this_fs, src);
81 /* Otherwise it is a "conventional filesystem" */
86 file = handle_to_file(rv);
87 if (file->inode->mode != DT_DIR) {
92 put_inode(this_fs->cwd);
93 this_fs->cwd = get_inode(file->inode);
96 /* Save the current working directory */
97 realpath(cwd_buf, src, CURRENTDIR_MAX);
99 /* Make sure the cwd_name ends in a slash, it's supposed to be a prefix */
100 join_paths(this_fs->cwd_name, CURRENTDIR_MAX, cwd_buf, "/");