diff options
Diffstat (limited to 'util/kconfig/patches/0012-safer-tmpfiles.patch')
| -rw-r--r-- | util/kconfig/patches/0012-safer-tmpfiles.patch | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/util/kconfig/patches/0012-safer-tmpfiles.patch b/util/kconfig/patches/0012-safer-tmpfiles.patch new file mode 100644 index 000000000000..d9b836181240 --- /dev/null +++ b/util/kconfig/patches/0012-safer-tmpfiles.patch @@ -0,0 +1,124 @@ +commit 7b2deddbb0ef350e189fe42c025b07c943aedc4c +Author: Raul E Rangel <rrangel@chromium.org> +Date: Thu Jul 25 15:49:52 2019 -0600 + + Kconfig: Write tmp files into same directory as target files + + This removes the need for COREBOOT_BUILD_DIR in Kconfig. Since the + original files will be replaced with the tmp file, the parent directory + already needs to be writable. + + Before this change, the tmp files would be created in the CWD (src) if + COREBOOT_BUILD_DIR was not specified. + + BUG=b:112267918 + TEST=emerge-grunt coreboot and verified no tmp files were created in the + src directory. + + Change-Id: Icdaf2ff3dd1ec98813b75ef55b96e38e1ca19ec7 + Signed-off-by: Raul E Rangel <rrangel@chromium.org> + Reviewed-on: https://review.coreboot.org/c/coreboot/+/34244 + Reviewed-by: Martin Roth <martinroth@google.com> + Tested-by: build bot (Jenkins) <no-reply@coreboot.org> + +Index: kconfig/confdata.c +=================================================================== +--- kconfig.orig/confdata.c ++++ kconfig/confdata.c +@@ -880,6 +880,16 @@ next_menu: + return 0; + } + ++ ++static int conf_mktemp(const char *path, char *tmpfile) ++{ ++ if (snprintf(tmpfile, PATH_MAX, "%s.tmp.XXXXXX", path) >= PATH_MAX) { ++ errno = EOVERFLOW; ++ return -1; ++ } ++ return mkstemp(tmpfile); ++} ++ + int conf_write(const char *name) + { + FILE *out; +@@ -1001,7 +1011,14 @@ static int conf_write_dep(const char *na + struct file *file; + FILE *out; + +- out = fopen("..config.tmp", "w"); ++ if (make_parent_dir(name)) ++ return 1; ++ char filename[PATH_MAX]; ++ int fd = conf_mktemp(name, filename); ++ if (fd == -1) ++ return 1; ++ ++ out = fdopen(fd, "w"); + if (!out) + return 1; + fprintf(out, "deps_config := \\\n"); +@@ -1019,9 +1036,7 @@ static int conf_write_dep(const char *na + fprintf(out, "\n$(deps_config): ;\n"); + fclose(out); + +- if (make_parent_dir(name)) +- return 1; +- rename("..config.tmp", name); ++ rename(filename, name); + return 0; + } + +@@ -1117,11 +1132,26 @@ int conf_write_autoconf(int overwrite) + if (conf_touch_deps()) + return 1; + +- out = fopen(".tmpconfig", "w"); ++ if (make_parent_dir(autoconf_name)) ++ return 1; ++ char filename[PATH_MAX]; ++ int fd = conf_mktemp(autoconf_name, filename); ++ if (fd == -1) ++ return 1; ++ out = fdopen(fd, "w"); + if (!out) + return 1; + +- out_h = fopen(".tmpconfig.h", "w"); ++ name = getenv("KCONFIG_AUTOHEADER"); ++ if (!name) ++ name = "include/generated/autoconf.h"; ++ if (make_parent_dir(name)) ++ return 1; ++ char filename_h[PATH_MAX]; ++ int fd_h = conf_mktemp(name, filename_h); ++ if (fd_h == -1) ++ return 1; ++ out_h = fdopen(fd_h, "w"); + if (!out_h) { + fclose(out); + return 1; +@@ -1144,21 +1174,14 @@ int conf_write_autoconf(int overwrite) + fclose(out); + fclose(out_h); + +- name = getenv("KCONFIG_AUTOHEADER"); +- if (!name) +- name = "include/generated/autoconf.h"; +- if (make_parent_dir(name)) +- return 1; +- if (rename(".tmpconfig.h", name)) ++ if (rename(filename_h, name)) + return 1; + +- if (make_parent_dir(autoconf_name)) +- return 1; + /* + * This must be the last step, kbuild has a dependency on auto.conf + * and this marks the successful completion of the previous steps. + */ +- if (rename(".tmpconfig", autoconf_name)) ++ if (rename(filename, autoconf_name)) + return 1; + + return 0; |