library: helper functions: added slbt_archive_import().

1 files changed, 95 insertions, 0 deletions

diff --git a/src/helper/slbt_archive_import.c b/src/helper/slbt_archive_import.c
new file mode 100644
index 0000000..7bd50cc
--- /dev/null
+++ b/src/helper/slbt_archive_import.c
@@ -0,0 +1,95 @@
+/*******************************************************************/
+/*  slibtool: a skinny libtool implementation, written in C        */
+/*  Copyright (C) 2016  Z. Gilboa                                  */
+/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
+/*******************************************************************/
+
+#include <stdlib.h>
+#include <limits.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <sys/wait.h>
+
+#include <slibtool/slibtool.h>
+#include "slibtool_spawn_impl.h"
+
+static int slbt_archive_import_child(
+	char *	program,
+	int	fd[2])
+{
+	char *	argv[3];
+
+	argv[0] = program;
+	argv[1] = "-M";
+	argv[2] = 0;
+
+	close(fd[1]);
+	close(0);
+
+	if (dup(fd[0]) == 0)
+		execvp(program,argv);
+
+	exit(EXIT_FAILURE);
+	return -1;
+}
+
+inline int slbt_archive_import(
+	const struct slbt_driver_ctx *	dctx,
+	struct slbt_exec_ctx *		ectx,
+	char *				dstarchive,
+	char *				srcarchive)
+{
+	pid_t	pid;
+	int	ret;
+	int	code;
+	int	fd[2];
+	FILE *	fout;
+	char	program[PATH_MAX];
+
+	if ((size_t)snprintf(program,sizeof(program),"%s",
+			dctx->cctx->host.ar) >= sizeof(program))
+		return -1;
+
+	if (pipe(fd))
+		return -1;
+
+	if ((pid = fork()) < 0) {
+		close(fd[0]);
+		close(fd[1]);
+		return -1;
+	}
+
+	if (pid == 0)
+		return slbt_archive_import_child(
+			program,
+			fd);
+
+	ectx->pid = pid;
+
+	if ((fout = fdopen(fd[1],"a"))) {
+		ret = (fprintf(
+				fout,
+				"OPEN %s\n"
+				"ADDLIB %s\n"
+				"SAVE\n"
+				"END\n",
+				dstarchive,
+				srcarchive) < 0)
+			? -1 : 0;
+
+		fclose(fout);
+		close(fd[0]);
+	} else {
+		ret = -1;
+		close(fd[0]);
+		close(fd[1]);
+	}
+
+	code = waitpid(
+		pid,
+		&ectx->exitcode,
+		0);
+
+	return ret || (code != pid) || ectx->exitcode
+		? -1 : 0;
+}