Olaf, I am cleaning up the code based on your feedback. By the time I am done with my cleanup, I doubt if this patch would apply. Do you mind if I were to include your changes here as part of my cleanup? Thank you, K. Y > -----Original Message----- > From: Olaf Hering [mailto:olaf@xxxxxxxxx] > Sent: Thursday, January 16, 2014 2:49 AM > To: KY Srinivasan > Cc: gregkh@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > devel@xxxxxxxxxxxxxxxxxxxxxx; apw@xxxxxxxxxxxxx; jasowang@xxxxxxxxxx > Subject: Re: [PATCH V2 1/1] Drivers: hv: Implement the file copy service > > On Tue, Jan 14, K. Y. Srinivasan wrote: > > > Implement the file copy service for Linux guests on Hyper-V. This permits the > > host to copy a file (over VMBUS) into the guest. This facility is part of > > "guest integration services" supported on the Windows platform. > > Here is a link that provides additional details on this functionality: > > The change below fixes some warnings in the daemon code. > Compile tested only. > I also think the newlines in some of the syslog calls should be removed. > > Olaf > > > hv_fcopy_daemon.c: In function 'hv_start_fcopy': > hv_fcopy_daemon.c:44:3: warning: format '%s' expects argument of type 'char > *', but argument 3 has type '__u16 *' [-Wformat=] > smsg->file_name); > ^ > hv_fcopy_daemon.c:44:3: warning: format '%s' expects argument of type 'char > *', but argument 5 has type '__u16 *' [-Wformat=] > hv_fcopy_daemon.c:57:6: warning: format '%s' expects argument of type 'char > *', but argument 3 has type '__u16 *' [-Wformat=] > errno, strerror(errno)); > ^ > hv_fcopy_daemon.c:61:4: warning: format '%s' expects argument of type 'char > *', but argument 3 has type '__u16 *' [-Wformat=] > syslog(LOG_ERR, "Invalid path: %s\n", smsg->path_name); > ^ > hv_fcopy_daemon.c: In function 'main': > hv_fcopy_daemon.c:117:8: warning: ignoring return value of 'daemon', declared > with attribute warn_unused_result [-Wunused-result] > daemon(1, 0); > ^ > hv_fcopy_daemon.c:132:7: warning: ignoring return value of 'write', declared > with attribute warn_unused_result [-Wunused-result] > write(fcopy_fd, &version, sizeof(int)); > ^ > hv_fcopy_daemon.c:171:9: warning: ignoring return value of 'pwrite', declared > with attribute warn_unused_result [-Wunused-result] > pwrite(fcopy_fd, &error, sizeof(int), 0); > ^ > > Signed-off-by: Olaf Hering <olaf@xxxxxxxxx> > > diff --git a/tools/hv/hv_fcopy_daemon.c b/tools/hv/hv_fcopy_daemon.c > index c0e5c90..d1fadb7 100644 > --- a/tools/hv/hv_fcopy_daemon.c > +++ b/tools/hv/hv_fcopy_daemon.c > @@ -35,14 +35,14 @@ > #include <dirent.h> > > static int target_fd; > -char target_fname[W_MAX_PATH]; > +static char target_fname[W_MAX_PATH]; > > static int hv_start_fcopy(struct hv_start_fcopy *smsg) > { > int error = HV_E_FAIL; > > - sprintf(target_fname, "%s%s%s", smsg->path_name, "/", > - smsg->file_name); > + snprintf(target_fname, sizeof(target_fname), "%s/%s", > + (char *)smsg->path_name, (char*)smsg->file_name); > > syslog(LOG_INFO, "Target file name: %s\n", target_fname); > /* > @@ -54,12 +54,12 @@ static int hv_start_fcopy(struct hv_start_fcopy *smsg) > if (mkdir((char *)smsg->path_name, 0755)) { > syslog(LOG_ERR, > "Failed to create '%s'; error: %d %s\n", > - smsg->path_name, > + (char *)smsg->path_name, > errno, strerror(errno)); > goto done; > } > } else { > - syslog(LOG_ERR, "Invalid path: %s\n", smsg- > >path_name); > + syslog(LOG_ERR, "Invalid path: %s", (char *)smsg- > >path_name); > goto done; > } > } > @@ -115,7 +115,8 @@ int main(void) > char *buffer[4096 * 2]; > struct hv_fcopy_hdr *in_msg; > > - daemon(1, 0); > + if (daemon(1, 0)) > + return 1; > openlog("HV_FCOPY", 0, LOG_USER); > syslog(LOG_INFO, "HV_FCOPY starting; pid is:%d", getpid()); > > @@ -130,7 +131,10 @@ int main(void) > /* > * Register with the kernel. > */ > - write(fcopy_fd, &version, sizeof(int)); > + if (write(fcopy_fd, &version, sizeof(int)) != sizeof(int)) { > + syslog(LOG_ERR, "write failed: %s",strerror(errno)); > + exit(EXIT_FAILURE); > + } > > while (1) { > /* > @@ -169,6 +173,9 @@ int main(void) > > } > > - pwrite(fcopy_fd, &error, sizeof(int), 0); > + if (pwrite(fcopy_fd, &error, sizeof(int), 0) != sizeof(int)) { > + syslog(LOG_ERR, "pwrite failed: %s",strerror(errno)); > + exit(EXIT_FAILURE); > + } > } > } _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
