Mailing List Archive

# HG changeset patch
# User Roger Pau Monne <roger.pau@entel.upc.edu>
# Date 1323864490 -3600
# Node ID 912b900aa74f6ce2083a48b42de19abdd6c76337
# Parent 1d1fc97535c2790731e7afbc4c891f7ef6167983
libxl: add libxl__forkexec function to libxl_exec

Add a new function to libxl_exec that performs a fork and executes
the passed arguments using libxl__exec.

Signed-off-by: Roger Pau Monne <roger.pau@entel.upc.edu>

diff -r 1d1fc97535c2 -r 912b900aa74f tools/libxl/libxl_exec.c
--- a/tools/libxl/libxl_exec.c Fri Sep 30 14:38:55 2011 +0200
+++ b/tools/libxl/libxl_exec.c Wed Dec 14 13:08:10 2011 +0100
@@ -449,6 +449,42 @@ int libxl__spawn_check(libxl__gc *gc, li
return ERROR_FAIL;
}

+int libxl__forkexec(libxl__gc *gc, int stdinfd, int stdoutfd,
+ int stderrfd, const char *arg0, char **args,
+ const char *what)
+{
+ libxl_ctx *ctx = libxl__gc_owner(gc);
+ int status;
+ int rc = 0;
+ pid_t pid = fork();
+
+ switch (pid) {
+ case -1:
+ LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "fork failed\n");
+ rc = -1;
+ break;
+ case 0:
+ libxl__exec(stdinfd, stdoutfd, stderrfd, arg0, args);
+ /* libxl__exec never returns */
+ default:
+ while (waitpid(pid, &status, 0) < 0) {
+ if (errno != EINTR) {
+ LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR,
+ "waitpid failed for %s\n",
+ what);
+ rc = -1;
+ break;
+ }
+ }
+ if (status)
+ libxl_report_child_exitstatus(ctx, LIBXL__LOG_ERROR,
+ what, pid, status);
+ rc = status;
+ break;
+ }
+ return rc;
+}
+
/*
* Local variables:
* mode: C
diff -r 1d1fc97535c2 -r 912b900aa74f tools/libxl/libxl_internal.h
--- a/tools/libxl/libxl_internal.h Fri Sep 30 14:38:55 2011 +0200
+++ b/tools/libxl/libxl_internal.h Wed Dec 14 13:08:10 2011 +0100
@@ -419,6 +419,20 @@ _hidden int libxl__spawn_check(libxl__gc
_hidden void libxl__exec(int stdinfd, int stdoutfd, int stderrfd,
const char *arg0, char **args); // logs errors, never returns

+/*
+ * libxl__forkexec - Executes a file synchronously
+ * argv0: file name associated with the file being executed.
+ * args: list of arguments. See execvp(3) man page for more info.
+ *
+ * Returns -1 if the execution fails or the exit status, as reported
+ * by waitpid, on success.
+ *
+ * Logs errors.
+ */
+_hidden int libxl__forkexec(libxl__gc *gc, int stdinfd, int stdoutfd,
+ int stderrfd, const char *arg0, char **args,
+ const char *what);
+
/* from xl_create */
_hidden int libxl__domain_make(libxl__gc *gc, libxl_domain_create_info *info, uint32_t *domid);
_hidden int libxl__domain_build(libxl__gc *gc,

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