|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Minios-devel] [UNIKRAFT PATCH v2 1/3] lib/posix-process: Introduce library
posix-process internal library provide POSIX compatibility for process-related
functionality. For now, we just take the stubs from newlib since they will be
used by other libc implementations as well (e.g. musl).
Signed-off-by: Costin Lupu <costin.lupu@xxxxxxxxx>
---
lib/Makefile.uk | 1 +
lib/posix-process/Config.uk | 4 +
lib/posix-process/Makefile.uk | 9 +
lib/posix-process/include/uk/process.h | 43 +++++
lib/posix-process/process.c | 230 +++++++++++++++++++++++++
5 files changed, 287 insertions(+)
create mode 100644 lib/posix-process/Config.uk
create mode 100644 lib/posix-process/Makefile.uk
create mode 100644 lib/posix-process/include/uk/process.h
create mode 100644 lib/posix-process/process.c
diff --git a/lib/Makefile.uk b/lib/Makefile.uk
index 3c1f5d9e..31248a1e 100644
--- a/lib/Makefile.uk
+++ b/lib/Makefile.uk
@@ -33,3 +33,4 @@ $(eval $(call _import_lib,$(CONFIG_UK_BASE)/lib/uklibparam))
$(eval $(call _import_lib,$(CONFIG_UK_BASE)/lib/uktime))
$(eval $(call _import_lib,$(CONFIG_UK_BASE)/lib/ukmmap))
$(eval $(call _import_lib,$(CONFIG_UK_BASE)/lib/ukblkdev))
+$(eval $(call _import_lib,$(CONFIG_UK_BASE)/lib/posix-process))
diff --git a/lib/posix-process/Config.uk b/lib/posix-process/Config.uk
new file mode 100644
index 00000000..5831a6c6
--- /dev/null
+++ b/lib/posix-process/Config.uk
@@ -0,0 +1,4 @@
+config LIBPOSIX_PROCESS
+ bool "POSIX process-related functions"
+ default n
+ select LIBNOLIBC if !HAVE_LIBC
diff --git a/lib/posix-process/Makefile.uk b/lib/posix-process/Makefile.uk
new file mode 100644
index 00000000..f45dddc4
--- /dev/null
+++ b/lib/posix-process/Makefile.uk
@@ -0,0 +1,9 @@
+$(eval $(call addlib_s,libposix_process,$(CONFIG_LIBPOSIX_PROCESS)))
+
+CINCLUDES-$(CONFIG_LIBPOSIX_PROCESS) += -I$(LIBPOSIX_PROCESS_BASE)/include
+CXXINCLUDES-$(CONFIG_LIBPOSIX_PROCESS) += -I$(LIBPOSIX_PROCESS_BASE)/include
+
+LIBPOSIX_PROCESS_SUPPRESS_FLAGS-y += -Wno-unused-parameter
+LIBPOSIX_PROCESS_CFLAGS-y += $(LIBPOSIX_PROCESS_SUPPRESS_FLAGS-y)
+
+LIBPOSIX_PROCESS_SRCS-y += $(LIBPOSIX_PROCESS_BASE)/process.c
diff --git a/lib/posix-process/include/uk/process.h
b/lib/posix-process/include/uk/process.h
new file mode 100644
index 00000000..67208e3d
--- /dev/null
+++ b/lib/posix-process/include/uk/process.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Costin Lupu <costin.lupu@xxxxxxxxx>
+ *
+ * Copyright (c) 2019, University Politehnica of Bucharest. All rights
reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
+ */
+
+#ifndef __UK_PROCESS_H__
+#define __UK_PROCESS_H__
+
+#define UNIKRAFT_PID 1
+#define UNIKRAFT_PPID 0
+#define UNIKRAFT_SID 0
+#define UNIKRAFT_PGID 0
+
+#endif /* __UK_PROCESS_H__ */
diff --git a/lib/posix-process/process.c b/lib/posix-process/process.c
new file mode 100644
index 00000000..e2668177
--- /dev/null
+++ b/lib/posix-process/process.c
@@ -0,0 +1,230 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Felipe Huici <felipe.huici@xxxxxxxxx>
+ * Costin Lupu <costin.lupu@xxxxxxxxx>
+ *
+ * Copyright (c) 2017, NEC Europe Ltd., NEC Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
+ */
+
+#include "../posix-process/include/uk/process.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/resource.h>
+#include <uk/print.h>
+
+
+int fork(void)
+{
+ /* fork() is not supported on this platform */
+ errno = ENOSYS;
+ return -1;
+}
+
+static
+void exec_warn(const char *func,
+ const char *path, char *const argv[], char *const envp[])
+{
+ int i;
+
+ uk_pr_warn("%s(): path=%s", func, path);
+
+ /* print arguments */
+ i = 0;
+ uk_pr_warn(" argv=[");
+ while (argv[i]) {
+ uk_pr_warn("%s%s", (i > 0 ? ", " : ""), argv[i]);
+ i++;
+ }
+ uk_pr_warn("]");
+
+ /* print environment variables */
+ if (envp) {
+ i = 0;
+ uk_pr_warn(" envp=[");
+ while (envp[i]) {
+ uk_pr_warn("%s%s", (i > 0 ? ", " : ""), envp[i]);
+ i++;
+ }
+ uk_pr_warn("]");
+ }
+
+ uk_pr_warn("\n");
+}
+
+int execve(const char *path, char *const argv[], char *const envp[])
+{
+ exec_warn(__func__, path, argv, envp);
+ errno = ENOSYS;
+ return -1;
+}
+
+int execv(const char *path, char *const argv[])
+{
+ exec_warn(__func__, path, argv, NULL);
+ errno = ENOSYS;
+ return -1;
+}
+
+int system(const char *command)
+{
+ uk_pr_warn("%s: %s\n", __func__, command);
+ errno = ENOSYS;
+ return -1;
+}
+
+FILE *popen(const char *command, const char *type __unused)
+{
+ uk_pr_warn("%s: %s\n", __func__, command);
+ errno = ENOSYS;
+ return NULL;
+}
+
+int pclose(FILE *stream __unused)
+{
+ errno = EINVAL;
+ return -1;
+}
+
+int wait(int *status __unused)
+{
+ /* No children */
+ errno = ECHILD;
+ return -1;
+}
+
+pid_t waitpid(pid_t pid __unused, int *wstatus __unused, int options __unused)
+{
+ /* No children */
+ errno = ECHILD;
+ return -1;
+}
+
+pid_t wait3(int *wstatus __unused, int options __unused,
+ struct rusage *rusage __unused)
+{
+ /* No children */
+ errno = ECHILD;
+ return -1;
+}
+
+pid_t wait4(pid_t pid __unused, int *wstatus __unused, int options __unused,
+ struct rusage *rusage __unused)
+{
+ /* No children */
+ errno = ECHILD;
+ return -1;
+}
+
+int getpid(void)
+{
+ return UNIKRAFT_PID;
+}
+
+pid_t getppid(void)
+{
+ return UNIKRAFT_PPID;
+}
+
+pid_t setsid(void)
+{
+ /* We have a single "session" with a single "process" */
+ errno = EPERM;
+ return (pid_t) -1;
+}
+
+pid_t getsid(pid_t pid)
+{
+ if (pid != 0) {
+ /* We support only calls for the only calling "process" */
+ errno = ESRCH;
+ return (pid_t) -1;
+ }
+ return UNIKRAFT_SID;
+}
+
+int setpgid(pid_t pid, pid_t pgid)
+{
+ if (pid != 0) {
+ /* We support only calls for the only calling "process" */
+ errno = ESRCH;
+ return (pid_t) -1;
+ }
+ if (pgid != 0) {
+ /* We have a single "group" with a single "process" */
+ errno = EPERM;
+ return (pid_t) -1;
+ }
+ return 0;
+}
+
+pid_t getpgid(pid_t pid)
+{
+ if (pid != 0) {
+ /* We support only calls for the only calling "process" */
+ errno = ESRCH;
+ return (pid_t) -1;
+ }
+ return UNIKRAFT_PGID;
+}
+
+pid_t getpgrp(void)
+{
+ return UNIKRAFT_PGID;
+}
+
+int setpgrp(void)
+{
+ return setpgid(0, 0);
+}
+
+int tcsetpgrp(int fd __unused, pid_t pgrp)
+{
+ /* TODO check if fd is BADF */
+ if (pgrp != UNIKRAFT_PGID) {
+ errno = EINVAL;
+ return -1;
+ }
+ return 0;
+}
+
+pid_t tcgetpgrp(int fd)
+{
+ /* We have a single "process group" */
+ return UNIKRAFT_PGID;
+}
+
+int nice(int inc __unused)
+{
+ /* We don't support priority updates for unikernels */
+ errno = EPERM;
+ return -1;
+}
--
2.20.1
_______________________________________________
Minios-devel mailing list
Minios-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/minios-devel
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |