add cdn-alt

Make /var/cache/debuginfo and its contents owned by dgbinfo. Create
the directories as this user, and switch to run as this user.

Signed-off-by: Icarus Sparry <icarus.w.sparry@intel.com>

Makefile.am

@@ -1,4 +1,4 @@
-EXTRA_DIST = COPYING clr_debug_fuse.service clr_debug_daemon.service debuginfo.conf
+EXTRA_DIST = COPYING clr_debug_fuse.service clr_debug_daemon.service clr_debug_daemon.socket debuginfo.conf
 
 DISTCHECK_CONFIGURE_FLAGS = \
 	--with-systemdsystemunitdir=$$dc_install_base/$(systemdsystemunitdir) \
@@ -33,7 +33,8 @@ clr_debug_fuse_SOURCES = src/fuse.c src/client.c
 clr_debug_daemon_SOURCES = src/server.c
 clr_debug_daemon_CFLAGS = \
 	-pthread \
-	$(AM_CFLAGS)
+	$(AM_CFLAGS) \
+	$(LIBSYSTEMD_CFLAGS)
 
 clr_debug_prepare_SOURCES = src/prepare.c
 
@@ -42,6 +43,6 @@ clr_debug_fuse_LDADD = ${fuse_LIBS} libnica.la
 clr_debug_daemon_LDADD = ${curl_LIBS} libnica.la
 clr_debug_prepare_LDADD = libnica.la
 
-systemdsystemunit_DATA = clr_debug_fuse.service clr_debug_daemon.service
+systemdsystemunit_DATA = clr_debug_fuse.service clr_debug_daemon.service clr_debug_daemon.socket
 
 tmpfiles_DATA = debuginfo.conf

clr_debug_daemon.service

@@ -1,10 +1,10 @@
 [Unit]
 Description=Clear Linux debuginfo daemon
+DefaultDependencies=no
 
 [Service]
 Type=simple
 ExecStart=/usr/bin/clr_debug_daemon
-DefaultDependencies=no
 
 [Install]
 WantedBy=multi-user.target

clr_debug_daemon.socket

@@ -0,0 +1,9 @@
+[Unit]
+Description=Clear Linux OS debuginfo daemon
+
+[Socket]
+ListenStream=/run/clr-debug-info
+SocketMode=0600
+
+[Install]
+WantedBy=sockets.target

clr_debug_fuse.service

@@ -1,11 +1,11 @@
 [Unit]
 Description=Clear Linux debuginfo fuse monitor
 After=clr_debug_daemon.service
+DefaultDependencies=no
 
 [Service]
 Type=simple
 ExecStart=/usr/bin/clr_debug_fuse
-DefaultDependencies=no
 
 [Install]
 WantedBy=multi-user.target

configure.ac

@@ -2,15 +2,17 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.66])
-AC_INIT(clr-debug-info, 38, arjan@linux.intel.com)
+AC_INIT(clr-debug-info, 43, arjan@linux.intel.com)
 AM_INIT_AUTOMAKE([foreign -Wall -W subdir-objects])
 AM_SILENT_RULES([yes])
 AC_PROG_CC
+AM_PROG_AR
 AC_LANG(C)
 AC_CONFIG_HEADERS([config.h])
 PKG_CHECK_MODULES([curl], [libcurl])
 PKG_CHECK_MODULES([fuse], [fuse])
 PKG_CHECK_MODULES([SYSTEMD], [systemd])
+PKG_CHECK_MODULES([LIBSYSTEMD], [libsystemd])
 LT_INIT
 
 dir=""

debuginfo.conf

@@ -8,5 +8,7 @@
 # See tmpfiles.d(5) for details
 
 # Clear tmp directories separately, to make them easier to override
-d /var/cache/debuginfo/lib 755 root root 10d
-d /var/cache/debuginfo/src 755 root root 1d
+# Unfortunatly tmpfiles doesn't change the ownership for things if they
+# are not listed.
+d /var/cache/debuginfo/lib 755 dbginfo dbginfo 10d
+d /var/cache/debuginfo/src 755 dbginfo dbginfo 1d

src/client.c

@@ -37,8 +37,8 @@
 #include <unistd.h>
 
 /* 0.75 seconds timeout */
-#define TIMEOUT 750000
-#define TIMEOUT2 15000
+#define TIMEOUT 75000
+#define TIMEOUT2 1500
 #define TIMEOUT3 500
 
 char *prefix = "src";
@@ -66,12 +66,11 @@ void try_to_get(const char *path, int pid, time_t timestamp)
         }
 
         sun.sun_family = AF_UNIX;
-        strcpy(sun.sun_path, ":clr-debug-info");
-        sun.sun_path[0] = 0; /* anonymous unix socket */
+        strcpy(sun.sun_path, "/run/clr-debug-info");
 
         ret = connect(sockfd,
                       (struct sockaddr *)&sun,
-                      offsetof(struct sockaddr_un, sun_path) + strlen(":clr-debug-info") + 1);
+                      offsetof(struct sockaddr_un, sun_path) + strlen("/run/clr-debug-info") + 1);
         if (ret < 0) {
                 printf("Cannot connect %s\n", strerror(errno));
                 close(sockfd);

src/prepare.c

@@ -137,7 +137,7 @@ static void do_one_file(char *base1, char *base2, char *path, int isdir)
 
                 if (!isdir &&
                     asprintf(&command,
-                             "tar --no-recursion -C %s -Jcf %s %s &",
+                             "tar --no-recursion -h -C %s -Jcf %s %s &",
                              base1,
                              fullpath2,
                              path) >= 0) {

src/server.c

@@ -27,9 +27,11 @@
 #define _GNU_SOURCE
 
 #include <errno.h>
+#include <grp.h>
 #include <linux/capability.h>
 #include <malloc.h>
 #include <pthread.h>
+#include <pwd.h>
 #include <signal.h>
 #include <stddef.h>
 #include <stdio.h>
@@ -47,6 +49,8 @@
 
 #include <curl/curl.h>
 
+#include "systemd/sd-daemon.h"
+
 #include "config.h"
 
 #ifdef HAVE_ATOMIC_SUPPORT
@@ -56,7 +60,7 @@
 static pthread_mutex_t dupes_mutex = PTHREAD_MUTEX_INITIALIZER;
 
 char *urls[2] = { "https://cdn.download.clearlinux.org/debuginfo/",
-                  "https://cdn.download.clearlinux.org/debuginfo/" };
+                  "https://cdn-alt.download.clearlinux.org/debuginfo/" };
 int urlcounter = 1;
 
 static NcHashmap *hash = NULL;
@@ -162,6 +166,7 @@ static int curl_get_file(const char *url, const char *prefix, time_t timestamp)
 {
         CURLcode code;
         long ret;
+        long changed;
         int fd;
         char filename[PATH_MAX];
         CURL *curl = NULL;
@@ -203,6 +208,9 @@ static int curl_get_file(const char *url, const char *prefix, time_t timestamp)
         curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 30);
         curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 1024);
 
+        /* request timestamp of files from server */
+        curl_easy_setopt(curl, CURLOPT_FILETIME, 1);
+
         if (timestamp) {
                 curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
                 curl_easy_setopt(curl, CURLOPT_TIMEVALUE, timestamp);
@@ -230,6 +238,17 @@ static int curl_get_file(const char *url, const char *prefix, time_t timestamp)
         }
 
         if (ret == 200) {
+                /* get timestamp, if any */
+                curl_easy_getinfo(curl, CURLINFO_FILETIME, &changed);
+                if (changed >= 0) {
+                        struct timespec times[2];
+                        times[0].tv_sec = (time_t)changed;
+                        times[0].tv_nsec = 0;
+                        times[1].tv_sec = (time_t)changed;
+                        times[1].tv_nsec = 0;
+                        futimens(fd, times);
+                }
+
                 autofree(char) *command = NULL;
                 //		printf("Filename is %s\n", filename);
 
@@ -237,7 +256,8 @@ static int curl_get_file(const char *url, const char *prefix, time_t timestamp)
                 stat(filename, &statbuf);
                 if (statbuf.st_size > 0 &&
                     asprintf(&command,
-                             "tar -C /var/cache/debuginfo/%s --no-same-owner  --no-same-permissions  -xf %s",
+                             "tar -C /var/cache/debuginfo/%s --no-same-owner "
+                             "--no-same-permissions  -xf %s",
                              prefix,
                              filename) >= 0) {
                         if (system(command) != 0) {
@@ -334,7 +354,7 @@ static void *server_thread(void *arg)
         }
 
         gettimeofday(&after, NULL);
-#if 0        
+#if 0
         if (timedelta(before, after) > 0.6)
                 printf("Request for %s took %5.2f seconds (%i - %i)\n",
                        url,
@@ -360,8 +380,19 @@ int main(__nc_unused__ int argc, __nc_unused__ char **argv)
         struct sockaddr_un sun;
         int ret;
         int curl_done = 0;
+        uid_t dbg_user = 0;
+        gid_t dbg_group = 0;
+        struct passwd *passwdentry;
         const char *required_paths[] = { "/var/cache/debuginfo/lib", "/var/cache/debuginfo/src" };
 
+        umask(0);
+        passwdentry = getpwnam("dbginfo");
+        if (passwdentry) {
+                dbg_user = passwdentry->pw_uid;
+                dbg_group = passwdentry->pw_gid;
+        }
+        endpwent();
+
         if (prctl(PR_SET_DUMPABLE, 0) != 0) {
                 fprintf(stderr,
                         "Failed to disable PR_SET_DUMPABLE. Do NOT gdb attach this process: %s\n",
@@ -376,36 +407,70 @@ int main(__nc_unused__ int argc, __nc_unused__ char **argv)
 
         for (size_t i = 0; i < ARRAY_SIZE(required_paths); i++) {
                 const char *req_path = required_paths[i];
-                if (nc_file_exists(req_path)) {
-                        continue;
+                struct stat st = { .st_ino = 0 };
+                if (lstat(req_path, &st) == 0) {
+                        /* If the file already exists, check ownership
+                         * and delete tree if incorrect. Essentially a
+                         * one-off operation to transition from root owned to
+                         * dbginfo owned */
+                        if (st.st_uid == dbg_user) {
+                                continue;
+                        }
+                        fprintf(stderr, "Removing old debug information %s\n", req_path);
+                        nc_rm_rf(req_path);
                 }
                 if (!nc_mkdir_p(req_path, 00755)) {
                         fprintf(stderr, "Failed to mkdir: %s %s\n", strerror(errno), req_path);
                         return EXIT_FAILURE;
                 }
+                if (chown(req_path, dbg_user, dbg_group) != 0) {
+                        fprintf(stderr, "Failed to chown: %s %s\n", strerror(errno), req_path);
+                        return EXIT_FAILURE;
+                }
         }
 
         signal(SIGPIPE, SIG_IGN);
 
-        sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
-        if (sockfd < 0) {
+	if (sd_listen_fds(0) == 1) {
+		/* systemd socket activation */
+		printf("Received socket from systemd socket activation\n");
+		sockfd = SD_LISTEN_FDS_START + 0;
+	} else if (sd_listen_fds(0) > 1) {
+		printf("Too many file descriptors received.\n");
+		exit(1);
+	} else {
+		sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
+		if (sockfd < 0) {
+			return EXIT_FAILURE;
+		}
+
+		sun.sun_family = AF_UNIX;
+		strcpy(sun.sun_path, "/run/clr-debug-info");
+
+		ret = bind(sockfd,
+			(struct sockaddr *)&sun,
+			offsetof(struct sockaddr_un, sun_path) + strlen("/run/clr-debug-info") + 1);
+		if (ret < 0) {
+			printf("Failed to bind:%s \n", strerror(errno));
+			return EXIT_FAILURE;
+		}
+
+		if (listen(sockfd, 16) < 0) {
+			printf("Failed to listen:%s \n", strerror(errno));
+			return EXIT_FAILURE;
+		}
+	}
+
+        if (setgid(dbg_group)) {
+                fprintf(stderr, "Unable to drop privileges setgid %s\n", strerror(errno));
                 return EXIT_FAILURE;
         }
-
-        sun.sun_family = AF_UNIX;
-        strcpy(sun.sun_path, ":clr-debug-info");
-        sun.sun_path[0] = 0; /* anonymous unix socket */
-
-        ret = bind(sockfd,
-                   (struct sockaddr *)&sun,
-                   offsetof(struct sockaddr_un, sun_path) + strlen(":clr-debug-info") + 1);
-        if (ret < 0) {
-                printf("Failed to bind:%s \n", strerror(errno));
+        if (setgroups(1, &dbg_group)) {
+                fprintf(stderr, "Unable to drop privileges setgroups %s\n", strerror(errno));
                 return EXIT_FAILURE;
         }
-
-        if (listen(sockfd, 16) < 0) {
-                printf("Failed to listen:%s \n", strerror(errno));
+        if (setuid(dbg_user)) {
+                fprintf(stderr, "Unable to drop privileges setuid  %s\n", strerror(errno));
                 return EXIT_FAILURE;
         }