mount: relabel both before and after a mount, just in case

[elogind.git] / src / util.c

diff --git a/src/util.c b/src/util.c
index 38d630e6a0f7061c76ca277ab20d6cc3ba331bc7..5daafdf7c2088d78d19fe93b05629bc83d22e87e 100644 (file)
--- a/src/util.c
+++ b/src/util.c
@@ -61,6 +61,20 @@
 #include "exit-status.h"
 #include "hashmap.h"
 
+size_t page_size(void) {
+        static __thread size_t pgsz = 0;
+        long r;
+
+        if (pgsz)
+                return pgsz;
+
+        assert_se((r = sysconf(_SC_PAGESIZE)) > 0);
+
+        pgsz = (size_t) r;
+
+        return pgsz;
+}
+
 bool streq_ptr(const char *a, const char *b) {
 
         /* Like streq(), but tries to make sense of NULL pointers */
@@ -499,7 +513,16 @@ int write_one_line_file(const char *fn, const char *line) {
         if (!endswith(line, "\n"))
                 fputc('\n', f);
 
-        r = 0;
+        fflush(f);
+
+        if (ferror(f)) {
+                if (errno != 0)
+                        r = -errno;
+                else
+                        r = -EIO;
+        } else
+                r = 0;
+
 finish:
         fclose(f);
         return r;
@@ -3524,7 +3547,7 @@ int touch(const char *path) {
 
         assert(path);
 
-        if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0666)) < 0)
+        if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0)
                 return -errno;
 
         close_nointr_nofail(fd);
@@ -3568,7 +3591,6 @@ char *normalize_env_assignment(const char *s) {
         free(p);
 
         if (!value) {
-                free(p);
                 free(name);
                 return NULL;
         }
@@ -3945,33 +3967,32 @@ int detect_vm(const char **id) {
         return 0;
 }
 
-/* Returns a short identifier for the various VM/container implementations */
-int detect_virtualization(const char **id) {
-        int r;
-        static __thread const char *cached_id = NULL;
-        const char *_id;
+int detect_container(const char **id) {
         FILE *f;
 
-        if (cached_id) {
+        /* Unfortunately many of these operations require root access
+         * in one way or another */
 
-                if (cached_id == (const char*) -1)
-                        return 0;
+        if (geteuid() != 0)
+                return -EPERM;
+
+        if (running_in_chroot() > 0) {
 
                 if (id)
-                        *id = cached_id;
+                        *id = "chroot";
 
                 return 1;
         }
 
-        /* Unfortunately most of these operations require root access
-         * in one way or another */
-        if (geteuid() != 0)
-                return -EPERM;
+        /* /proc/vz exists in container and outside of the container,
+         * /proc/bc only outside of the container. */
+        if (access("/proc/vz", F_OK) >= 0 &&
+            access("/proc/bc", F_OK) < 0) {
 
-        if ((r = running_in_chroot()) > 0) {
-                _id = "chroot";
-                r = 1;
-                goto finish;
+                if (id)
+                        *id = "openvz";
+
+                return 1;
         }
 
         if ((f = fopen("/proc/self/cgroup", "r"))) {
@@ -3991,36 +4012,49 @@ int detect_virtualization(const char **id) {
                         if (!streq(p, ":ns:/")) {
                                 fclose(f);
 
-                                r = 1;
-                                _id = "ns";
-                                goto finish;
+                                if (id)
+                                        *id = "pidns";
+
+                                return 1;
                         }
                 }
 
                 fclose(f);
         }
 
-        /* /proc/vz exists in container and outside of the container,
-         * /proc/bc only outside of the container. */
-        if (access("/proc/vz", F_OK) >= 0 &&
-            access("/proc/bc", F_OK) < 0) {
-                _id = "openvz";
-                r = 1;
-                goto finish;
+        return 0;
+}
+
+/* Returns a short identifier for the various VM/container implementations */
+int detect_virtualization(const char **id) {
+        static __thread const char *cached_id = NULL;
+        const char *_id;
+        int r;
+
+        if (cached_id) {
+
+                if (cached_id == (const char*) -1)
+                        return 0;
+
+                if (id)
+                        *id = cached_id;
+
+                return 1;
         }
 
+        if ((r = detect_container(&_id)) != 0)
+                goto finish;
+
         r = detect_vm(&_id);
 
 finish:
-        if (r < 0)
-                return r;
-        else if (r > 0)
+        if (r > 0) {
                 cached_id = _id;
-        else
-                cached_id = (const char*) -1;
 
-        if (id)
-                *id = _id;
+                if (id)
+                        *id = _id;
+        } else if (r == 0)
+                cached_id = (const char*) -1;
 
         return r;
 }
@@ -4162,6 +4196,46 @@ bool nulstr_contains(const char*nulstr, const char *needle) {
         return false;
 }
 
+bool plymouth_running(void) {
+        return access("/run/plymouth/pid", F_OK) >= 0;
+}
+
+void parse_syslog_priority(char **p, int *priority) {
+        int a = 0, b = 0, c = 0;
+        int k;
+
+        assert(p);
+        assert(*p);
+        assert(priority);
+
+        if ((*p)[0] != '<')
+                return;
+
+        if (!strchr(*p, '>'))
+                return;
+
+        if ((*p)[2] == '>') {
+                c = undecchar((*p)[1]);
+                k = 3;
+        } else if ((*p)[3] == '>') {
+                b = undecchar((*p)[1]);
+                c = undecchar((*p)[2]);
+                k = 4;
+        } else if ((*p)[4] == '>') {
+                a = undecchar((*p)[1]);
+                b = undecchar((*p)[2]);
+                c = undecchar((*p)[3]);
+                k = 5;
+        } else
+                return;
+
+        if (a < 0 || b < 0 || c < 0)
+                return;
+
+        *priority = a*100+b*10+c;
+        *p += k;
+}
+
 static const char *const ioprio_class_table[] = {
         [IOPRIO_CLASS_NONE] = "none",
         [IOPRIO_CLASS_RT] = "realtime",
@@ -4182,7 +4256,7 @@ static const char *const sigchld_code_table[] = {
 
 DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
 
-static const char *const log_facility_table[LOG_NFACILITIES] = {
+static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = {
         [LOG_FAC(LOG_KERN)] = "kern",
         [LOG_FAC(LOG_USER)] = "user",
         [LOG_FAC(LOG_MAIL)] = "mail",
@@ -4205,7 +4279,7 @@ static const char *const log_facility_table[LOG_NFACILITIES] = {
         [LOG_FAC(LOG_LOCAL7)] = "local7"
 };
 
-DEFINE_STRING_TABLE_LOOKUP(log_facility, int);
+DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int);
 
 static const char *const log_level_table[] = {
         [LOG_EMERG] = "emerg",