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Old 08-05-2011, 12:06 PM
David Cantrell
 
Default Restart NetworkManager to use anaconda's initial ifcfg config (#727951)

Comments below.

On 08/05/2011 04:47 AM, Radek Vykydal wrote:

NM is started by systemd before anaconda writes out initial ifcfg files
which results in creating of automatic default connections (e.g.
"Wired connection 1"). The settings of auto connections are not persistent
so we are ok just restarting the NM.


---
loader/loader.c | 7 +++--
pyanaconda/isys/iface.c | 63 ++++++++++------------------------------------
pyanaconda/isys/iface.h | 4 +-
3 files changed, 20 insertions(+), 54 deletions(-)

diff --git a/loader/loader.c b/loader/loader.c
index ec07b78..5b87ba8 100644
--- a/loader/loader.c
+++ b/loader/loader.c
@@ -2173,9 +2173,10 @@ int main(int argc, char ** argv) {
}
#endif

- /* Start NetworkManager now so it's always available to talk to. */
- if (iface_start_NetworkManager())
- logMessage(INFO, "failed to start NetworkManager");
+ /* Restart NetworkManager now so that it uses our inital ifcfg config */
+ logMessage(INFO, "restarting NetworkManager");
+ if (iface_restart_NetworkManager())
+ logMessage(ERROR, "failed to restart NetworkManager");

if (!FL_CMDLINE(flags))
startNewt();
diff --git a/pyanaconda/isys/iface.c b/pyanaconda/isys/iface.c
index b5d539a..cdb1141 100644
--- a/pyanaconda/isys/iface.c
+++ b/pyanaconda/isys/iface.c
@@ -58,7 +58,6 @@
static struct nl_handle *_iface_get_handle(void);
static struct nl_cache *_iface_get_link_cache(struct nl_handle **);
static int _iface_have_valid_addr(void *addr, int family, int length);
-static int _iface_redirect_io(char *device, int fd, int mode);

/*
* Return a libnl handle for NETLINK_ROUTE.
@@ -128,31 +127,6 @@ static int _iface_have_valid_addr(void *addr, int family, int length) {
}

/*
- * Redirect I/O to another device (e.g., stdout to /dev/tty5)
- */
-int _iface_redirect_io(char *device, int fd, int mode) {
- int io = -1;
-
- if ((io = open(device, mode)) == -1) {
- return 1;
- }
-
- if (close(fd) == -1) {
- return 2;
- }
-
- if (dup2(io, fd) == -1) {
- return 3;
- }
-
- if (close(io) == -1) {
- return 4;
- }
-
- return 0;
-}
-
-/*
* Given an interface name (e.g., eth0) and address family (e.g., AF_INET),
* return the IP address in human readable format (i.e., the output from
* inet_ntop()). Return NULL for no match or error.
@@ -498,40 +472,31 @@ int wait_for_nm(void) {
}

/*
- * Start NetworkManager -- requires that you have already written out the
+ * Restart NetworkManager -- requires that you have already written out the
* control files in /etc/sysconfig for the interface.
*/
-int iface_start_NetworkManager(void) {
- pid_t pid;
+int iface_restart_NetworkManager(void) {
+ int child, status;

- if (is_nm_running())
- return 0; /* already running */
+ if (!(child = fork())) {
+ int fd = open("/dev/tty3", O_RDWR);

- /* Start NetworkManager */
- pid = fork();
- if (pid == 0) {
- if (setpgrp() == -1) {
- exit(1);
- }
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ close(fd);

- if (_iface_redirect_io("/dev/null", STDIN_FILENO, O_RDONLY) ||
- _iface_redirect_io(OUTPUT_TERMINAL, STDOUT_FILENO, O_WRONLY) ||
- _iface_redirect_io(OUTPUT_TERMINAL, STDERR_FILENO, O_WRONLY)) {
- exit(2);
- }
+ execl("/bin/systemctl", "/bin/systemctl", "restart", "NetworkManager.service", NULL);
+ _exit(1);
+ }


You've dropped the return value checking for dup2() and execl(), among
other things. Please add these back, as well as checking return values
for other functions you call (e.g., waitpid()). _iface_redirect_io()
was meant to make that easier for dup2().




- if (execl(NETWORKMANAGER, NETWORKMANAGER,
- "--pid-file=/var/run/NetworkManager/NetworkManager.pid",
- NULL) == -1) {
- exit(3);
- }
- } else if (pid == -1) {
+ waitpid(child,&status, 0);
+ if (!WIFEXITED(status) || (WIFEXITED(status)&& WEXITSTATUS(status))) {
return 1;
} else {
return wait_for_nm();
}

- return 0;
}

/*
diff --git a/pyanaconda/isys/iface.h b/pyanaconda/isys/iface.h
index 2d0e4af..a386865 100644
--- a/pyanaconda/isys/iface.h
+++ b/pyanaconda/isys/iface.h
@@ -156,9 +156,9 @@ gboolean is_nm_connected(void);
gboolean is_iface_activated(char * ifname);

/*
- * Start NetworkManager
+ * Restart NetworkManager
*/
-int iface_start_NetworkManager(void);
+int iface_restart_NetworkManager(void);

/*
* Set Maximum Transfer Unit (MTU) on specified interface


--
David Cantrell <dcantrell@redhat.com>
Supervisor, Installer Engineering Team
Red Hat, Inc. | Westford, MA | EST5EDT

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