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Blame SOURCES/0260-shared-include-root-when-canonicalizing-conf-paths.patch

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From b7f7813318b370d9ecf3833f92c5258d362d9441 Mon Sep 17 00:00:00 2001
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From: Michael Marineau <michael.marineau@coreos.com>
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Date: Fri, 31 Jan 2014 15:35:04 -0800
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Subject: [PATCH] shared: include root when canonicalizing conf paths
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The conf_files_list family accepts an alternate root path to prefix all
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directories in the list but path_strv_canonicalize_uniq doesn't use it.
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This results in the suspicious behavior of resolving directory symlinks
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based on the contents of / instead of the alternate root.
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This adds a prefix argument to path_strv_canonicalize which will now
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prepend the prefix, if given, to every path in the list. To avoid
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answering what a relative path means when called with a root prefix
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path_strv_canonicalize is now path_strv_canonicalize_absolute and only
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considers absolute paths. Fortunately all users of already call
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path_strv_canonicalize with a list of absolute paths.
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(cherry picked from commit 112cfb181453e38d3ef4a74fba23abbb53392002)
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Related: #1111199
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---
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 src/shared/conf-files.c  | 10 +++-------
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 src/shared/path-lookup.c |  6 +++---
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 src/shared/path-util.c   | 29 +++++++++++++++++++----------
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 src/shared/path-util.h   |  4 ++--
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 src/shared/util.c        |  2 +-
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 src/udev/udev-rules.c    |  2 +-
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 6 files changed, 29 insertions(+), 24 deletions(-)
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diff --git a/src/shared/conf-files.c b/src/shared/conf-files.c
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index ed4070c..3d5b1df 100644
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--- a/src/shared/conf-files.c
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+++ b/src/shared/conf-files.c
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@@ -37,12 +37,8 @@
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 #include "hashmap.h"
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 #include "conf-files.h"
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-static int files_add(Hashmap *h, const char *root, const char *path, const char *suffix) {
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+static int files_add(Hashmap *h, const char *dirpath, const char *suffix) {
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         _cleanup_closedir_ DIR *dir = NULL;
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-        _cleanup_free_ char *dirpath = NULL;
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-
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-        if (asprintf(&dirpath, "%s%s", root ? root : "", path) < 0)
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-                return -ENOMEM;
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         dir = opendir(dirpath);
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         if (!dir) {
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@@ -104,7 +100,7 @@ static int conf_files_list_strv_internal(char ***strv, const char *suffix, const
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         assert(suffix);
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         /* This alters the dirs string array */
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-        if (!path_strv_canonicalize_uniq(dirs))
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+        if (!path_strv_canonicalize_absolute_uniq(dirs, root))
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                 return -ENOMEM;
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         fh = hashmap_new(string_hash_func, string_compare_func);
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@@ -112,7 +108,7 @@ static int conf_files_list_strv_internal(char ***strv, const char *suffix, const
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                 return -ENOMEM;
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         STRV_FOREACH(p, dirs) {
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-                r = files_add(fh, root, *p, suffix);
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+                r = files_add(fh, *p, suffix);
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                 if (r == -ENOMEM) {
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                         hashmap_free_free(fh);
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                         return r;
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diff --git a/src/shared/path-lookup.c b/src/shared/path-lookup.c
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index 1a47ea9..03c1380 100644
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--- a/src/shared/path-lookup.c
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+++ b/src/shared/path-lookup.c
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@@ -316,7 +316,7 @@ int lookup_paths_init(
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                 }
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         }
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-        if (!path_strv_canonicalize(p->unit_path))
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+        if (!path_strv_canonicalize_absolute(p->unit_path, NULL))
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                 return -ENOMEM;
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         strv_uniq(p->unit_path);
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@@ -372,10 +372,10 @@ int lookup_paths_init(
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                                 return -ENOMEM;
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                 }
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-                if (!path_strv_canonicalize(p->sysvinit_path))
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+                if (!path_strv_canonicalize_absolute(p->sysvinit_path, NULL))
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                         return -ENOMEM;
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-                if (!path_strv_canonicalize(p->sysvrcnd_path))
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+                if (!path_strv_canonicalize_absolute(p->sysvrcnd_path, NULL))
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                         return -ENOMEM;
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                 strv_uniq(p->sysvinit_path);
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diff --git a/src/shared/path-util.c b/src/shared/path-util.c
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index 45099ee..de291a5 100644
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--- a/src/shared/path-util.c
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+++ b/src/shared/path-util.c
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@@ -165,7 +165,7 @@ char **path_strv_make_absolute_cwd(char **l) {
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         return l;
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 }
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-char **path_strv_canonicalize(char **l) {
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+char **path_strv_canonicalize_absolute(char **l, const char *prefix) {
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         char **s;
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         unsigned k = 0;
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         bool enomem = false;
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@@ -180,13 +180,21 @@ char **path_strv_canonicalize(char **l) {
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         STRV_FOREACH(s, l) {
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                 char *t, *u;
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-                t = path_make_absolute_cwd(*s);
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-                free(*s);
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-                *s = NULL;
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-
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-                if (!t) {
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-                        enomem = true;
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+                if (!path_is_absolute(*s))
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                         continue;
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+
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+                if (prefix) {
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+                        t = strappend(prefix, *s);
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+                        free(*s);
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+                        *s = NULL;
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+
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+                        if (!t) {
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+                                enomem = true;
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+                                continue;
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+                        }
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+                } else {
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+                        t = *s;
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+                        *s = NULL;
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                 }
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                 errno = 0;
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@@ -196,7 +204,7 @@ char **path_strv_canonicalize(char **l) {
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                                 u = t;
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                         else {
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                                 free(t);
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-                                if (errno == ENOMEM || !errno)
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+                                if (errno == ENOMEM || errno == 0)
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                                         enomem = true;
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                                 continue;
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@@ -215,11 +223,12 @@ char **path_strv_canonicalize(char **l) {
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         return l;
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 }
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-char **path_strv_canonicalize_uniq(char **l) {
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+char **path_strv_canonicalize_absolute_uniq(char **l, const char *prefix) {
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+
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         if (strv_isempty(l))
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                 return l;
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-        if (!path_strv_canonicalize(l))
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+        if (!path_strv_canonicalize_absolute(l, prefix))
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                 return NULL;
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         return strv_uniq(l);
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diff --git a/src/shared/path-util.h b/src/shared/path-util.h
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index 0a42de7..c69cd1f 100644
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--- a/src/shared/path-util.h
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+++ b/src/shared/path-util.h
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@@ -43,8 +43,8 @@ char* path_startswith(const char *path, const char *prefix) _pure_;
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 bool path_equal(const char *a, const char *b) _pure_;
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 char** path_strv_make_absolute_cwd(char **l);
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-char** path_strv_canonicalize(char **l);
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-char** path_strv_canonicalize_uniq(char **l);
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+char** path_strv_canonicalize_absolute(char **l, const char *prefix);
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+char** path_strv_canonicalize_absolute_uniq(char **l, const char *prefix);
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 int path_is_mount_point(const char *path, bool allow_symlink);
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 int path_is_read_only_fs(const char *path);
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diff --git a/src/shared/util.c b/src/shared/util.c
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index fb1e6d1..a5163fb 100644
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--- a/src/shared/util.c
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+++ b/src/shared/util.c
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@@ -5681,7 +5681,7 @@ static int search_and_fopen_internal(const char *path, const char *mode, char **
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         assert(mode);
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         assert(_f);
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-        if (!path_strv_canonicalize_uniq(search))
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+        if (!path_strv_canonicalize_absolute_uniq(search, NULL))
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                 return -ENOMEM;
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         STRV_FOREACH(i, search) {
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diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c
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index 6f8b127..9092b08 100644
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--- a/src/udev/udev-rules.c
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+++ b/src/udev/udev-rules.c
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@@ -1630,7 +1630,7 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
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                 log_error("failed to build config directory array");
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                 return udev_rules_unref(rules);
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         }
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-        if (!path_strv_canonicalize(rules->dirs)) {
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+        if (!path_strv_canonicalize_absolute(rules->dirs, NULL)) {
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                 log_error("failed to canonicalize config directories\n");
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                 return udev_rules_unref(rules);
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         }