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machined: add logic to query IP addresses of containers
[elogind.git] / src / shared / util.c
diff --git a/src/shared/util.c b/src/shared/util.c
index c8a017db862713223c33a779a6fe869d1e2ddaba..0cc51e0962607fbdc36bf32e851836415c68401e 100644 (file)
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -83,7 +83,6 @@
 #include "gunicode.h"
 #include "virt.h"
 #include "def.h"
-#include "missing.h"
 
 int saved_argc = 0;
 char **saved_argv = NULL;
@@ -2017,7 +2016,6 @@ int ignore_signals(int sig, ...) {
         va_list ap;
         int r = 0;
 
-
         if (sigaction(sig, &sa, NULL) < 0)
                 r = -errno;
 
@@ -2443,6 +2441,24 @@ void sigset_add_many(sigset_t *ss, ...) {
         va_end(ap);
 }
 
+int sigprocmask_many(int how, ...) {
+        va_list ap;
+        sigset_t ss;
+        int sig;
+
+        assert_se(sigemptyset(&ss) == 0);
+
+        va_start(ap, how);
+        while ((sig = va_arg(ap, int)) > 0)
+                assert_se(sigaddset(&ss, sig) == 0);
+        va_end(ap);
+
+        if (sigprocmask(how, &ss, NULL) < 0)
+                return -errno;
+
+        return 0;
+}
+
 char* gethostname_malloc(void) {
         struct utsname u;
 
@@ -2483,7 +2499,7 @@ static char *lookup_uid(uid_t uid) {
         if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw)
                 return strdup(pw->pw_name);
 
-        if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
+        if (asprintf(&name, UID_FMT, uid) < 0)
                 return NULL;
 
         return name;
@@ -2608,7 +2624,7 @@ int get_ctty(pid_t pid, dev_t *_devnr, char **r) {
 
                 /* This is an ugly hack */
                 if (major(devnr) == 136) {
-                        asprintf(&b, "pts/%lu", (unsigned long) minor(devnr));
+                        asprintf(&b, "pts/%u", minor(devnr));
                         goto finish;
                 }
 
@@ -4283,7 +4299,7 @@ char* uid_to_name(uid_t uid) {
         if (p)
                 return strdup(p->pw_name);
 
-        if (asprintf(&r, "%lu", (unsigned long) uid) < 0)
+        if (asprintf(&r, UID_FMT, uid) < 0)
                 return NULL;
 
         return r;
@@ -4300,7 +4316,7 @@ char* gid_to_name(gid_t gid) {
         if (p)
                 return strdup(p->gr_name);
 
-        if (asprintf(&r, "%lu", (unsigned long) gid) < 0)
+        if (asprintf(&r, GID_FMT, gid) < 0)
                 return NULL;
 
         return r;
@@ -5445,21 +5461,25 @@ out:
 
 const char *draw_special_char(DrawSpecialChar ch) {
         static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = {
+
                 /* UTF-8 */ {
-                        [DRAW_TREE_VERT]          = "\342\224\202 ",            /* │  */
+                        [DRAW_TREE_VERTICAL]      = "\342\224\202 ",            /* │  */
                         [DRAW_TREE_BRANCH]        = "\342\224\234\342\224\200", /* ├─ */
                         [DRAW_TREE_RIGHT]         = "\342\224\224\342\224\200", /* └─ */
                         [DRAW_TREE_SPACE]         = "  ",                       /*    */
-                        [DRAW_TRIANGULAR_BULLET]  = "\342\200\243 ",            /* ‣  */
-                        [DRAW_BLACK_CIRCLE]       = "\342\227\217 ",            /* ●  */
+                        [DRAW_TRIANGULAR_BULLET]  = "\342\200\243",             /* ‣ */
+                        [DRAW_BLACK_CIRCLE]       = "\342\227\217",             /* ● */
+                        [DRAW_ARROW]              = "\342\206\222",             /* → */
                 },
+
                 /* ASCII fallback */ {
-                        [DRAW_TREE_VERT]          = "| ",
+                        [DRAW_TREE_VERTICAL]      = "| ",
                         [DRAW_TREE_BRANCH]        = "|-",
                         [DRAW_TREE_RIGHT]         = "`-",
                         [DRAW_TREE_SPACE]         = "  ",
-                        [DRAW_TRIANGULAR_BULLET]  = "> ",
-                        [DRAW_BLACK_CIRCLE]       = "* ",
+                        [DRAW_TRIANGULAR_BULLET]  = ">",
+                        [DRAW_BLACK_CIRCLE]       = "*",
+                        [DRAW_ARROW]              = "->",
                 }
         };
 
@@ -6071,60 +6091,93 @@ int container_get_leader(const char *machine, pid_t *pid) {
         return 0;
 }
 
-int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd) {
-        _cleanup_close_ int pidnsfd = -1, mntnsfd = -1;
-        const char *pidns, *mntns, *root;
+int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *root_fd) {
+        _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1;
         int rfd;
 
         assert(pid >= 0);
-        assert(pidns_fd);
-        assert(mntns_fd);
-        assert(root_fd);
 
-        mntns = procfs_file_alloca(pid, "ns/mnt");
-        mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
-        if (mntnsfd < 0)
-                return -errno;
+        if (mntns_fd) {
+                const char *mntns;
 
-        pidns = procfs_file_alloca(pid, "ns/pid");
-        pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
-        if (pidnsfd < 0)
-                return -errno;
+                mntns = procfs_file_alloca(pid, "ns/mnt");
+                mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+                if (mntnsfd < 0)
+                        return -errno;
+        }
 
-        root = procfs_file_alloca(pid, "root");
-        rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
-        if (rfd < 0)
-                return -errno;
+        if (pidns_fd) {
+                const char *pidns;
+
+                pidns = procfs_file_alloca(pid, "ns/pid");
+                pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+                if (pidnsfd < 0)
+                        return -errno;
+        }
+
+        if (netns_fd) {
+                const char *netns;
+
+                netns = procfs_file_alloca(pid, "ns/net");
+                netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+                if (netnsfd < 0)
+                        return -errno;
+        }
+
+        if (root_fd) {
+                const char *root;
 
-        *pidns_fd = pidnsfd;
-        *mntns_fd = mntnsfd;
-        *root_fd = rfd;
-        pidnsfd = -1;
-        mntnsfd = -1;
+                root = procfs_file_alloca(pid, "root");
+                rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
+                if (rfd < 0)
+                        return -errno;
+        }
+
+        if (pidns_fd)
+                *pidns_fd = pidnsfd;
+
+        if (mntns_fd)
+                *mntns_fd = mntnsfd;
+
+        if (netns_fd)
+                *netns_fd = netnsfd;
+
+        if (root_fd)
+                *root_fd = rfd;
+
+        pidnsfd = mntnsfd = netnsfd = -1;
 
         return 0;
 }
 
-int namespace_enter(int pidns_fd, int mntns_fd, int root_fd) {
-        assert(pidns_fd >= 0);
-        assert(mntns_fd >= 0);
-        assert(root_fd >= 0);
+int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int root_fd) {
 
-        if (setns(pidns_fd, CLONE_NEWPID) < 0)
-                return -errno;
+        if (pidns_fd >= 0)
+                if (setns(pidns_fd, CLONE_NEWPID) < 0)
+                        return -errno;
 
-        if (setns(mntns_fd, CLONE_NEWNS) < 0)
-                return -errno;
+        if (mntns_fd >= 0)
+                if (setns(mntns_fd, CLONE_NEWNS) < 0)
+                        return -errno;
 
-        if (fchdir(root_fd) < 0)
-                return -errno;
+        if (netns_fd >= 0)
+                if (setns(netns_fd, CLONE_NEWNET) < 0)
+                        return -errno;
 
-        if (chroot(".") < 0)
-                return -errno;
+        if (root_fd >= 0) {
+                if (fchdir(root_fd) < 0)
+                        return -errno;
+
+                if (chroot(".") < 0)
+                        return -errno;
+        }
 
         if (setresgid(0, 0, 0) < 0)
                 return -errno;
 
+        if (setgroups(0, NULL) < 0)
+                return -errno;
+
         if (setresuid(0, 0, 0) < 0)
                 return -errno;
 
@@ -6398,3 +6451,19 @@ void hexdump(FILE *f, const void *p, size_t s) {
                 s -= 16;
         }
 }
+
+int update_reboot_param_file(const char *param)
+{
+        int r = 0;
+
+        if (param) {
+
+                r = write_string_file(REBOOT_PARAM_FILE, param);
+                if (r < 0)
+                        log_error("Failed to write reboot param to "
+                                  REBOOT_PARAM_FILE": %s", strerror(-r));
+        } else
+                unlink(REBOOT_PARAM_FILE);
+
+        return r;
+}
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