diff options
Diffstat (limited to 'abspath.c')
| -rw-r--r-- | abspath.c | 53 |
1 files changed, 25 insertions, 28 deletions
@@ -55,21 +55,17 @@ static void get_next_component(struct strbuf *next, struct strbuf *remaining) * Return the real path (i.e., absolute path, with symlinks resolved * and extra slashes removed) equivalent to the specified path. (If * you want an absolute path but don't mind links, use - * absolute_path().) The return value is a pointer to a static - * buffer. + * absolute_path().) Places the resolved realpath in the provided strbuf. * * The directory part of path (i.e., everything up to the last * dir_sep) must denote a valid, existing directory, but the last * component need not exist. If die_on_error is set, then die with an * informative error message if there is a problem. Otherwise, return * NULL on errors (without generating any output). - * - * If path is our buffer, then return path, as it's already what the - * user wants. */ -static const char *real_path_internal(const char *path, int die_on_error) +char *strbuf_realpath(struct strbuf *resolved, const char *path, + int die_on_error) { - static struct strbuf resolved = STRBUF_INIT; struct strbuf remaining = STRBUF_INIT; struct strbuf next = STRBUF_INIT; struct strbuf symlink = STRBUF_INIT; @@ -77,10 +73,6 @@ static const char *real_path_internal(const char *path, int die_on_error) int num_symlinks = 0; struct stat st; - /* We've already done it */ - if (path == resolved.buf) - return path; - if (!*path) { if (die_on_error) die("The empty string is not a valid path"); @@ -88,16 +80,16 @@ static const char *real_path_internal(const char *path, int die_on_error) goto error_out; } - strbuf_reset(&resolved); + strbuf_reset(resolved); if (is_absolute_path(path)) { /* absolute path; start with only root as being resolved */ int offset = offset_1st_component(path); - strbuf_add(&resolved, path, offset); + strbuf_add(resolved, path, offset); strbuf_addstr(&remaining, path + offset); } else { /* relative path; can use CWD as the initial resolved path */ - if (strbuf_getcwd(&resolved)) { + if (strbuf_getcwd(resolved)) { if (die_on_error) die_errno("unable to get current working directory"); else @@ -116,21 +108,21 @@ static const char *real_path_internal(const char *path, int die_on_error) continue; /* '.' component */ } else if (next.len == 2 && !strcmp(next.buf, "..")) { /* '..' component; strip the last path component */ - strip_last_component(&resolved); + strip_last_component(resolved); continue; } /* append the next component and resolve resultant path */ - if (!is_dir_sep(resolved.buf[resolved.len - 1])) - strbuf_addch(&resolved, '/'); - strbuf_addbuf(&resolved, &next); + if (!is_dir_sep(resolved->buf[resolved->len - 1])) + strbuf_addch(resolved, '/'); + strbuf_addbuf(resolved, &next); - if (lstat(resolved.buf, &st)) { + if (lstat(resolved->buf, &st)) { /* error out unless this was the last component */ if (errno != ENOENT || remaining.len) { if (die_on_error) die_errno("Invalid path '%s'", - resolved.buf); + resolved->buf); else goto error_out; } @@ -146,12 +138,12 @@ static const char *real_path_internal(const char *path, int die_on_error) goto error_out; } - len = strbuf_readlink(&symlink, resolved.buf, + len = strbuf_readlink(&symlink, resolved->buf, st.st_size); if (len < 0) { if (die_on_error) die_errno("Invalid symlink '%s'", - resolved.buf); + resolved->buf); else goto error_out; } @@ -159,8 +151,8 @@ static const char *real_path_internal(const char *path, int die_on_error) if (is_absolute_path(symlink.buf)) { /* absolute symlink; set resolved to root */ int offset = offset_1st_component(symlink.buf); - strbuf_reset(&resolved); - strbuf_add(&resolved, symlink.buf, offset); + strbuf_reset(resolved); + strbuf_add(resolved, symlink.buf, offset); strbuf_remove(&symlink, 0, offset); } else { /* @@ -168,7 +160,7 @@ static const char *real_path_internal(const char *path, int die_on_error) * strip off the last component since it will * be replaced with the contents of the symlink */ - strip_last_component(&resolved); + strip_last_component(resolved); } /* @@ -188,24 +180,29 @@ static const char *real_path_internal(const char *path, int die_on_error) } } - retval = resolved.buf; + retval = resolved->buf; error_out: strbuf_release(&remaining); strbuf_release(&next); strbuf_release(&symlink); + if (!retval) + strbuf_reset(resolved); + return retval; } const char *real_path(const char *path) { - return real_path_internal(path, 1); + static struct strbuf realpath = STRBUF_INIT; + return strbuf_realpath(&realpath, path, 1); } const char *real_path_if_valid(const char *path) { - return real_path_internal(path, 0); + static struct strbuf realpath = STRBUF_INIT; + return strbuf_realpath(&realpath, path, 0); } /* |