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gotwebd: error path leak & semplification for render_index
On Tue, Nov 22, 2022 at 12:04:44PM +0100, Omar Polo wrote: > On 2022/11/09 18:36:27 +0100, Omar Polo <op@omarpolo.com> wrote: > > On 2022/11/09 15:48:47 +0100, Stefan Sperling <stsp@stsp.name> wrote: > > > On Wed, Nov 09, 2022 at 03:27:52PM +0100, Omar Polo wrote: > > > > - strcmp(sd_dent[d_i]->d_name, "..") == 0) > > > > + strcmp(sd_dent[d_i]->d_name, "..") == 0 || > > > > + sd_dent[d_i]->d_type != DT_DIR) { > > > > > > Unfortunately, we cannot rely on d_type directly. It is unreliable > > > because it depends on the filesystem implementation. > > > See got_path_dirent_type() in lib/path.c for a workaround. > > > > Indeed, i forgot about the NFS without readdir plus issue. Here's an > > updated diff that uses got_path_dirent_type. > > ping ok by me. > ----------------------------------------------- > commit ee2f63eba45d621e2387fe7297d27dec9290a4e8 > from: Omar Polo <op@omarpolo.com> > date: Tue Nov 22 11:00:49 2022 UTC > > gotwebd: simplify gotweb_render_index > > - drops the double loop; paginate in one go > > - avoid lstat + got_path_dir_is_empty for each entry: use dt_type if > provided by the underlying filesystem > > - fixes a memleak: before `continue' we need to call > gotweb_free_repo_dir > > diff 0ceb1b9e49ae865b84f237977d7edbcaa9697161 ee2f63eba45d621e2387fe7297d27dec9290a4e8 > commit - 0ceb1b9e49ae865b84f237977d7edbcaa9697161 > commit + ee2f63eba45d621e2387fe7297d27dec9290a4e8 > blob - fdc41cd4d2cb16ff84e4c42c6a8c826e6f239dc0 > blob + 09d8f166fab40a704104d07aaa4c8e0564295c66 > --- gotwebd/gotweb.c > +++ gotwebd/gotweb.c > @@ -993,10 +993,9 @@ gotweb_render_index(struct request *c) > struct repo_dir *repo_dir = NULL; > DIR *d; > struct dirent **sd_dent = NULL; > - char *c_path = NULL; > - struct stat st; > unsigned int d_cnt, d_i, d_disp = 0; > - int r; > + unsigned int d_skipped = 0; > + int r, type; > > d = opendir(srv->repos_path); > if (d == NULL) { > @@ -1011,25 +1010,6 @@ gotweb_render_index(struct request *c) > goto done; > } > > - /* get total count of repos */ > - for (d_i = 0; d_i < d_cnt; d_i++) { > - if (strcmp(sd_dent[d_i]->d_name, ".") == 0 || > - strcmp(sd_dent[d_i]->d_name, "..") == 0) > - continue; > - > - if (asprintf(&c_path, "%s/%s", srv->repos_path, > - sd_dent[d_i]->d_name) == -1) { > - error = got_error_from_errno("asprintf"); > - goto done; > - } > - > - if (lstat(c_path, &st) == 0 && S_ISDIR(st.st_mode) && > - !got_path_dir_is_empty(c_path)) > - t->repos_total++; > - free(c_path); > - c_path = NULL; > - } > - > r = fcgi_printf(c, "<div id='index_header'>\n" > "<div id='index_header_project'>Project</div>\n"); > if (r == -1) > @@ -1055,9 +1035,20 @@ gotweb_render_index(struct request *c) > break; > > if (strcmp(sd_dent[d_i]->d_name, ".") == 0 || > - strcmp(sd_dent[d_i]->d_name, "..") == 0) > + strcmp(sd_dent[d_i]->d_name, "..") == 0) { > + d_skipped++; > continue; > + } > > + error = got_path_dirent_type(&type, srv->repos_path, > + sd_dent[d_i]); > + if (error) > + goto done; > + if (type != DT_DIR) { > + d_skipped++; > + continue; > + } > + > if (qs->index_page > 0 && (qs->index_page * > srv->max_repos_display) > t->prev_disp) { > t->prev_disp++; > @@ -1071,21 +1062,14 @@ gotweb_render_index(struct request *c) > error = gotweb_load_got_path(c, repo_dir); > if (error && error->code == GOT_ERR_NOT_GIT_REPO) { > error = NULL; > - continue; > - } > - else if (error && error->code != GOT_ERR_LONELY_PACKIDX) > - goto done; > - > - if (lstat(repo_dir->path, &st) == 0 && > - S_ISDIR(st.st_mode) && > - !got_path_dir_is_empty(repo_dir->path)) > - goto render; > - else { > gotweb_free_repo_dir(repo_dir); > repo_dir = NULL; > + d_skipped++; > continue; > } > -render: > + if (error && error->code != GOT_ERR_LONELY_PACKIDX) > + goto done; > + > d_disp++; > t->prev_disp++; > > @@ -1201,6 +1185,8 @@ render: > if (d_disp == srv->max_repos_display) > break; > } > + t->repos_total = d_cnt - d_skipped; > + > if (srv->max_repos_display == 0) > goto done; > if (srv->max_repos > 0 && srv->max_repos < srv->max_repos_display) > >
gotwebd: error path leak & semplification for render_index