libglusterfs: Move devel headers under glusterfs directory

libglusterfs devel package headers are referenced in code using
include semantics for a program, this while it works can be better
especially when dealing with out of tree xlator builds or in
general out of tree devel package usage.

Towards this, the following changes are done,
- moved all devel headers under a glusterfs directory
- Included these headers using system header notation <> in all
code outside of libglusterfs
- Included these headers using own program notation "" within
libglusterfs

This change although big, is just moving around the headers and
making it correct when including these headers from other sources.

This helps us correctly include libglusterfs includes without
namespace conflicts.

Change-Id: Id2a98854e671a7ee5d73be44da5ba1a74252423b
Updates: bz#1193929
Signed-off-by: ShyamsundarR <srangana@redhat.com>

1 files changed, 207 insertions, 0 deletions

diff --git a/libglusterfs/src/glusterfs/run.h b/libglusterfs/src/glusterfs/run.h
new file mode 100644
index 00000000000..76af95fd27f
--- /dev/null
+++ b/libglusterfs/src/glusterfs/run.h
@@ -0,0 +1,207 @@
+/*
+  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#ifndef __RUN_H__
+#define __RUN_H__
+
+#define RUN_PIPE -1
+
+struct runner {
+    char **argv;
+    unsigned argvlen;
+    int runerr;
+    pid_t chpid;
+    int chfd[3];
+    FILE *chio[3];
+};
+
+typedef struct runner runner_t;
+
+/**
+ * initialize runner_t instance.
+ *
+ * @param runner pointer to runner_t instance
+ */
+void
+runinit(runner_t *runner);
+
+/**
+ * get FILE pointer to which child's stdio is redirected.
+ *
+ * @param runner pointer to runner_t instance
+ * @param fd specifies which standard file descriptor is
+ *        is asked for
+ *
+ * @see runner_redir()
+ */
+FILE *
+runner_chio(runner_t *runner, int fd);
+
+/**
+ * add an argument.
+ *
+ * 'arg' is duplicated.
+ *
+ * Errors are deferred, no error handling is necessary.
+ *
+ * @param runner pointer to runner_t instance
+ * @param arg    command line argument
+ */
+void
+runner_add_arg(runner_t *runner, const char *arg);
+
+/**
+ * add a sequence of arguments.
+ *
+ * Variadic function, calls runner_add_arg() on each vararg.
+ * Argument sequence MUST be NULL terminated.
+ *
+ * Errors are deferred, no error handling is necessary.
+ *
+ * @param runner pointer to runner_t instance
+ *
+ * @see runner_add_arg()
+ */
+void
+runner_add_args(runner_t *runner, ...);
+
+/**
+ * add an argument with printf style formatting.
+ *
+ * Errors are deferred, no error handling is necessary.
+ *
+ * @param runner pointer to runner_t instance
+ * @param format printf style format specifier
+ */
+void
+runner_argprintf(runner_t *runner, const char *format, ...)
+    __attribute__((__format__(__printf__, 2, 3)));
+/**
+ * log a message about the command to be run.
+ *
+ * @param runner  pointer to runner_t instance
+ *
+ * @param dom  log domain
+ * @param lvl  log level
+ * @param msg  message with which the command is prefixed in log
+ *
+ * @see gf_log()
+ */
+void
+runner_log(runner_t *runner, const char *dom, gf_loglevel_t lvl,
+           const char *msg);
+
+/**
+ * set up redirection for child.
+ *
+ * @param runner  pointer to runner_t instance
+ *
+ * @param fd      fd of child to redirect (0, 1, or 2)
+ * @param tgt_fd  fd on parent side to redirect to.
+ *                Note that runner_end() will close tgt_fd,
+ *                if user needs it in another context it should
+ *                be dup'd beforehand.
+ *                RUN_PIPE can be used for requiring a
+ *                pipe from child to parent. The FILE
+ *                created for this purpose will be
+ *                accessible via runner_chio() (after
+ *                runner_start() has been invoked).
+ *
+ * @see  runner_start(), dup(2), runner_chio(), runner_start()
+ */
+void
+runner_redir(runner_t *runner, int fd, int tgt_fd);
+
+/**
+ * spawn child with accumulated arg list.
+ *
+ * @param runner  pointer to runner_t instance
+ *
+ * @return  0 on successful spawn
+ *          -1 on failure (either due to earlier errors or execve(2) failing)
+ *
+ * @see runner_cout()
+ */
+int
+runner_start(runner_t *runner);
+
+/**
+ * complete operation and free resources.
+ *
+ * If child exists, waits for it. Redirections will be closed.
+ * Dynamically allocated memory shall be freed.
+ *
+ * @param runner  pointer to runner_t instance
+ *
+ * @return  0 if child terminated successfully
+ *          -1 if there is no running child
+ *          n > 0 if child failed; value to be interpreted as status
+ *                in waitpid(2)
+ *
+ * @see waitpid(2)
+ */
+int
+runner_end(runner_t *runner);
+
+/**
+ * variant of runner_end() which does not free internal data
+ * so that the runner instance can be run again.
+ *
+ * @see runner_end()
+ */
+int
+runner_end_reuse(runner_t *runner);
+
+/**
+ * spawn and child, take it to completion and free resources.
+ *
+ * Essentially it's a concatenation of runner_start() and runner_end()
+ * with simplified return semantics.
+ *
+ * @param runner  pointer to runner_t instance
+ *
+ * @return  0 on success
+ *          -1 on failuire
+ *
+ * @see runner_start(), runner_end()
+ */
+int
+runner_run(runner_t *runner);
+
+/**
+ * variant for runner_run() which does not wait for acknowledgement
+ * from child, and always assumes it succeeds.
+ */
+int
+runner_run_nowait(runner_t *runner);
+
+/**
+ * variant of runner_run() which does not free internal data
+ * so that the runner instance can be run again.
+ *
+ * @see runner_run()
+ */
+int
+runner_run_reuse(runner_t *runner);
+
+/**
+ * run a command with args.
+ *
+ * Variadic function, child process is spawned with
+ * the given sequence of args and waited for.
+ * Argument sequence MUST be NULL terminated.
+ *
+ * @return 0 on success
+ *         -1 on failure
+ */
+int
+runcmd(const char *arg, ...);
+
+#endif