From f4aa9a89dd2b9b9f87779014c2efecb1a094c31b Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 11 Dec 2003 18:56:42 +0000
Subject: may changes

git-svn-id: file:///home/lennart/svn/public/libdaemon/trunk@47 153bfa13-eec0-0310-be40-b0cb6a0e1b4b
---
 Makefile.am        |   3 +
 configure.ac       |   8 +--
 doc/README.html.in |   2 +-
 examples/testd.c   |   2 +
 libdaemon.pc.in    |  10 ++++
 src/Makefile.am    |   8 ++-
 src/daemon.h       |  36 +++++++++++
 src/dexec.c        | 173 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/dexec.h        |  47 +++++++++++++++
 src/dlog.h         |   2 -
 10 files changed, 281 insertions(+), 10 deletions(-)
 create mode 100644 libdaemon.pc.in
 create mode 100644 src/daemon.h
 create mode 100644 src/dexec.c
 create mode 100644 src/dexec.h

diff --git a/Makefile.am b/Makefile.am
index 05b43a6..ca83772 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -22,6 +22,9 @@ SUBDIRS=src doc examples
 MAINTAINERCLEANFILES = README libdaemon.spec
 noinst_DATA = README libdaemon.spec
 
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = libdaemon.pc
+
 README:
 	rm -f README
 	$(MAKE) -C doc README
diff --git a/configure.ac b/configure.ac
index 7deb5d8..a7ddaae 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,7 +20,7 @@
 # Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 
 AC_PREREQ(2.57)
-AC_INIT([libdaemon], [0.3], [mzqnrzba (at) 0pointer (dot) de])
+AC_INIT([libdaemon], [0.4], [mzqnrzba (at) 0pointer (dot) de])
 AC_CONFIG_SRCDIR([src/dfork.c])
 AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE([foreign -Wall])
@@ -38,8 +38,8 @@ if test "x$GCC" = "xyes" ; then
 fi
 
 if type -p stow > /dev/null && test -d /usr/local/stow ; then
-   AC_MSG_NOTICE([*** Found /usr/local/stow: installing to /usr/local/stow/${PACKAGE_NAME}-${PACKAGE_VERSION} ***])
-   AC_PREFIX_DEFAULT([/usr/local/stow/${PACKAGE_NAME}-${PACKAGE_VERSION}])
+   AC_MSG_NOTICE([*** Found /usr/local/stow: default install prefix set to /usr/local/stow/${PACKAGE_NAME}-${PACKAGE_VERSION} ***])
+   ac_default_prefix="/usr/local/stow/${PACKAGE_NAME}-${PACKAGE_VERSION}"
 fi
 
 # Checks for header files.
@@ -97,5 +97,5 @@ fi
 
 AM_CONDITIONAL([USE_LYNX], [test "x$lynx" = xyes])
 
-AC_CONFIG_FILES([src/Makefile Makefile doc/Makefile doc/README.html doc/doxygen.conf examples/Makefile libdaemon.spec])
+AC_CONFIG_FILES([src/Makefile Makefile doc/Makefile doc/README.html doc/doxygen.conf examples/Makefile libdaemon.spec libdaemon.pc])
 AC_OUTPUT
diff --git a/doc/README.html.in b/doc/README.html.in
index d66fdc4..fc3aea9 100644
--- a/doc/README.html.in
+++ b/doc/README.html.in
@@ -53,7 +53,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.</p>
 
 <h2><a name="overview">Overview</a></h2>
 
-<p><tt>libdaemon</tt> is a lightweight C library which eases the writing of UNIX
+<p><tt>libdaemon</tt> is a lightweight C library that eases the writing of UNIX
 daemons. It consists of the following parts:</p>
 
 <ul>
diff --git a/examples/testd.c b/examples/testd.c
index ec5f690..cf93870 100644
--- a/examples/testd.c
+++ b/examples/testd.c
@@ -26,6 +26,7 @@
 #include <dsignal.h>
 #include <dlog.h>
 #include <dpid.h>
+#include <dexec.h>
 
 int main(int argc, char *argv[]) {
     pid_t pid;
@@ -147,6 +148,7 @@ int main(int argc, char *argv[]) {
 
                     case SIGHUP:
                         daemon_log(LOG_INFO, "Got a HUP");
+                        daemon_exec("/", NULL, "/bin/ls", "ls", (char*) NULL);
                         break;
 
                 }
diff --git a/libdaemon.pc.in b/libdaemon.pc.in
new file mode 100644
index 0000000..4074627
--- /dev/null
+++ b/libdaemon.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: libdaemon
+Description: a lightweight C library that eases the writing of UNIX daemons
+Version: @PACKAGE_VERSION@
+Libs: -L${libdir} -ldaemon
+Cflags: -D_REENTRANT -I${includedir}/libdaemon
diff --git a/src/Makefile.am b/src/Makefile.am
index c2719ed..cef803e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -16,7 +16,7 @@
 # along with libdaemon; if not, write to the Free Software Foundation,
 # Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 
-pkginclude_HEADERS = dlog.h dfork.h dsignal.h dnonblock.h dpid.h
+pkginclude_HEADERS = dlog.h dfork.h dsignal.h dnonblock.h dpid.h dexec.h daemon.h
 
 lib_LTLIBRARIES = libdaemon.la
 
@@ -25,6 +25,8 @@ libdaemon_la_SOURCES = \
 	dfork.c dfork.h \
 	dsignal.c dsignal.h \
 	dnonblock.c dnonblock.h \
-	dpid.c dpid.h
+	dpid.c dpid.h \
+	dexec.c dexec.h \
+	daemon.h
 
-libdaemon_la_LDFLAGS = -version-info 1:0:1
+libdaemon_la_LDFLAGS = -version-info 2:0:2
diff --git a/src/daemon.h b/src/daemon.h
new file mode 100644
index 0000000..405b4f9
--- /dev/null
+++ b/src/daemon.h
@@ -0,0 +1,36 @@
+#ifndef foodaemonhfoo
+#define foodaemonhfoo
+
+/* $Id: exec.h 4 2003-08-10 19:56:53Z lennart $ */
+
+/*
+ * This file is part of libdaemon.
+ *
+ * libdaemon is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * libdaemon is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with libdaemon; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+/** \file
+ *
+ * A header file including all other header files part of libdaemon
+ */
+
+#include "dfork.h"
+#include "dlog.h"
+#include "dpid.h"
+#include "dsignal.h"
+#include "dexec.h"
+#include "dnonblock.h"
+
+#endif
diff --git a/src/dexec.c b/src/dexec.c
new file mode 100644
index 0000000..dba0fc1
--- /dev/null
+++ b/src/dexec.c
@@ -0,0 +1,173 @@
+/* $Id: exec.c 31 2003-11-05 22:04:26Z lennart $ */
+
+/*
+ * This file is part of libdaemon.
+ *
+ * libdaemon is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * libdaemon is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with libdaemon; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <limits.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "dlog.h"
+#include "dsignal.h"
+
+#include "dexec.h"
+
+#define MAX_ARGS 100
+
+int daemon_exec(const char *dir, int *ret, const char *prog, ...) {
+    pid_t pid;
+    int p[2];
+    unsigned n = 0;
+    static char buf[256];
+    int sigfd, r;
+    fd_set fds;
+    va_list ap;
+
+    if (pipe(p) < 0) {
+        daemon_log(LOG_ERR, "pipe() failed: %s", strerror(errno));
+        return -1;
+    }
+    
+    if ((pid = fork()) < 0) {
+        daemon_log(LOG_ERR, "fork() failed: %s", strerror(errno));
+        return -1;
+        
+    } else if (pid == 0) {
+        char *args[MAX_ARGS];
+        int i;
+        
+        if (p[1] != 1)
+            dup2(p[1], 1);
+
+        if (p[1] != 2)
+            dup2(p[1], 2);
+        
+        if (p[0] > 2)
+            close(p[0]);
+
+        if (p[1] > 2)
+            close(p[1]);
+
+        close(0);
+        if (open("/dev/null", O_RDONLY) != 0) {
+            daemon_log(LOG_ERR, "Unable to open /dev/null as STDIN");
+            _exit(EXIT_FAILURE);
+        }
+        
+	umask(0022); /* Set up a sane umask */
+        
+        if (dir && chdir(dir) < 0) {
+            daemon_log(LOG_WARNING, "Failed to change to directory '%s'", dir);
+            chdir("/");
+        }
+        
+        va_start(ap, prog);
+        for (i = 0; i < MAX_ARGS-1; i++)
+            if (!(args[i] = va_arg(ap, char*)))
+                break;
+        args[i] = NULL;
+        va_end(ap);
+        
+        execv(prog, args);
+        
+        daemon_log(LOG_ERR, "execv(%s) failed: %s\n", prog, strerror(errno));
+        
+        _exit(EXIT_FAILURE);
+    }
+    
+    close(p[1]);
+    
+    FD_ZERO(&fds);
+    FD_SET(p[0], &fds);
+    FD_SET(sigfd = daemon_signal_fd(), &fds);
+
+    n = 0;
+
+    for (;;) {
+        fd_set qfds = fds;
+
+        if (select(FD_SETSIZE, &qfds, NULL, NULL, NULL) < 0) {
+
+            if (errno == EINTR)
+                continue;
+
+            daemon_log(LOG_ERR, "select() failed: %s", strerror(errno));
+            return -1;
+        }
+
+
+        if (FD_ISSET(p[0], &qfds)) {
+            char c;
+
+            if (read(p[0], &c, 1) != 1)
+                break;
+
+            buf[n] = c;
+            
+            if (c == '\n' || n >= sizeof(buf) - 2) {
+                if (c != '\n') n++;
+                buf[n] = 0;
+
+                if (buf[0]) 
+                    daemon_log(LOG_INFO, "client: %s", buf); 
+                
+                n = 0;
+            } else
+                n++;
+        }
+        
+        if (FD_ISSET(sigfd, &qfds)) {
+            int sig;
+            
+            if ((sig = daemon_signal_next()) < 0) {
+                daemon_log(LOG_ERR, "daemon_signal_next(): %s", strerror(errno));
+                break;
+            }
+            
+            if (sig != SIGCHLD) {
+                daemon_log(LOG_WARNING, "Killing child.");
+                kill(pid, SIGTERM);
+            }
+        }
+    }
+    
+    if (n > 0) {
+        buf[n] = 0;
+        daemon_log(LOG_WARNING, "client: %s", buf); 
+    }
+    
+    waitpid(pid, &r, 0);
+    
+    close(p[0]);
+    
+    if (!WIFEXITED(r))
+        return -1;
+
+    if (ret)
+        *ret = WEXITSTATUS(r);
+    return 0;
+}
diff --git a/src/dexec.h b/src/dexec.h
new file mode 100644
index 0000000..b9e1879
--- /dev/null
+++ b/src/dexec.h
@@ -0,0 +1,47 @@
+#ifndef foodexechfoo
+#define foodexechfoo
+
+/* $Id: exec.h 4 2003-08-10 19:56:53Z lennart $ */
+
+/*
+ * This file is part of libdaemon.
+ *
+ * libdaemon is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * libdaemon is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with libdaemon; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+/** \file
+ *
+ * Contains a robust API for running sub processes with STDOUT and
+ * STDERR redirected to syslog
+ */
+
+/** If this variable is defined to 1 iff daemon_pid_file_kill_wait() is supported.*/
+#define DAEMON_EXEC_AVAILABLE 1
+
+/** Run the specified executable with the specified arguments in the
+ * specified directory and return the return value of the program in
+ * the specified pointer. The calling process is blocked until the
+ * child finishes, alls child output (either STDOUT or STDIN) is
+ * written to syslog.
+ * 
+ * @param dir Working directory for the process.
+ * @param ret A pointer to an integer to write the return value of the program to.
+ * @param prog The path to the executable
+ * @param ... The arguments to be passed to the program, followed by a (char *) NULL
+ * @return Nonzero on failure, zero on success
+ */
+int daemon_exec(const char *dir, int *ret, const char *prog, ...);
+
+#endif
diff --git a/src/dlog.h b/src/dlog.h
index 8edf6b3..036c5c0 100644
--- a/src/dlog.h
+++ b/src/dlog.h
@@ -21,13 +21,11 @@
 
 #include <syslog.h>
 
-
 /** \file
  *
  * Contains a robust API for logging messages
  */
 
-
 /** Specifies where to send the log messages to
  */
 enum daemon_log_flags {
-- 
cgit