From ee17ee7c5cc22c286f943578918beaa78bbc86db Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 12 Jul 2011 03:56:56 +0200
Subject: [PATCH] tmpfiles: allow creation of named pipes with tmpfiles

---
 TODO               |  2 --
 man/tmpfiles.d.xml |  5 +++++
 src/tmpfiles.c     | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/TODO b/TODO
index ff8ee5f2..36a57f4b 100644
--- a/TODO
+++ b/TODO
@@ -28,8 +28,6 @@ Features:
 
 * add conditions for file executability
 
-* allow creating fifos with tmpfiles
-
 * implement Register= switch in .socket units to enable registration
   in Avahi, RPC and other socket registration services.
 
diff --git a/man/tmpfiles.d.xml b/man/tmpfiles.d.xml
index abc74ef6..7f4c45c9 100644
--- a/man/tmpfiles.d.xml
+++ b/man/tmpfiles.d.xml
@@ -112,6 +112,11 @@ d    /run/user 0755 root root 10d</programlisting>
                                         <listitem><para>Create or empty a directory</para></listitem>
                                 </varlistentry>
 
+                                <varlistentry>
+                                        <term><varname>p</varname></term>
+                                        <listitem><para>Create a named pipe (FIFO) if it doesn't exist yet</para></listitem>
+                                </varlistentry>
+
                                 <varlistentry>
                                         <term><varname>x</varname></term>
                                         <listitem><para>Ignore a path
diff --git a/src/tmpfiles.c b/src/tmpfiles.c
index 4394f0dd..feb2a214 100644
--- a/src/tmpfiles.c
+++ b/src/tmpfiles.c
@@ -56,6 +56,7 @@ enum {
         TRUNCATE_FILE = 'F',
         CREATE_DIRECTORY = 'd',
         TRUNCATE_DIRECTORY = 'D',
+        CREATE_FIFO = 'p',
 
         /* These ones take globs */
         IGNORE_PATH = 'x',
@@ -505,6 +506,48 @@ static int create_item(Item *i) {
                         }
 
                 break;
+
+        case CREATE_FIFO:
+
+                u = umask(0);
+                r = mkfifo(i->path, i->mode);
+                umask(u);
+
+                if (r < 0 && errno != EEXIST) {
+                        log_error("Failed to create fifo %s: %m", i->path);
+                        r = -errno;
+                        goto finish;
+                }
+
+                if (stat(i->path, &st) < 0) {
+                        log_error("stat(%s) failed: %m", i->path);
+                        r = -errno;
+                        goto finish;
+                }
+
+                if (!S_ISFIFO(st.st_mode)) {
+                        log_error("%s is not a fifo.", i->path);
+                        r = -EEXIST;
+                        goto finish;
+                }
+
+                if (i->mode_set)
+                        if (chmod(i->path, i->mode) < 0) {
+                                log_error("chmod(%s) failed: %m", i->path);
+                                r = -errno;
+                                goto finish;
+                        }
+
+                if (i->uid_set || i->gid_set)
+                        if (chown(i->path,
+                                   i->uid_set ? i->uid : (uid_t) -1,
+                                   i->gid_set ? i->gid : (gid_t) -1) < 0) {
+                                log_error("chown(%s) failed: %m", i->path);
+                                r = -errno;
+                                goto finish;
+                        }
+
+                break;
         }
 
         if ((r = label_fix(i->path, false)) < 0)
@@ -529,6 +572,7 @@ static int remove_item(Item *i, const char *instance) {
         case CREATE_FILE:
         case TRUNCATE_FILE:
         case CREATE_DIRECTORY:
+        case CREATE_FIFO:
         case IGNORE_PATH:
                 break;
 
@@ -562,6 +606,7 @@ static int remove_item_glob(Item *i) {
         case CREATE_FILE:
         case TRUNCATE_FILE:
         case CREATE_DIRECTORY:
+        case CREATE_FIFO:
         case IGNORE_PATH:
                 break;
 
@@ -689,6 +734,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
             i->type != TRUNCATE_FILE &&
             i->type != CREATE_DIRECTORY &&
             i->type != TRUNCATE_DIRECTORY &&
+            i->type != CREATE_FIFO &&
             i->type != IGNORE_PATH &&
             i->type != REMOVE_PATH &&
             i->type != RECURSIVE_REMOVE_PATH) {
-- 
2.39.5