slibtoolize: slbt_st_get_stoolie_ctx(): initial implementation.

1 files changed, 266 insertions, 0 deletions

diff --git a/src/stoolie/slbt_stoolie_ctx.c b/src/stoolie/slbt_stoolie_ctx.c
new file mode 100644
index 0000000..f562cf9
--- /dev/null
+++ b/src/stoolie/slbt_stoolie_ctx.c
@@ -0,0 +1,266 @@
+/*******************************************************************/
+/*  slibtool: a strong libtool implementation, written in C        */
+/*  Copyright (C) 2016--2024  SysDeer Technologies, LLC            */
+/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
+/*******************************************************************/
+
+#include <ctype.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include <slibtool/slibtool.h>
+#include "slibtool_driver_impl.h"
+#include "slibtool_errinfo_impl.h"
+#include "slibtool_realpath_impl.h"
+#include "slibtool_stoolie_impl.h"
+#include "slibtool_txtline_impl.h"
+#include "slibtool_m4fake_impl.h"
+
+static int slbt_st_free_stoolie_ctx_impl(
+	struct slbt_stoolie_ctx_impl *  ctx,
+	int                             fdsrc,
+	int                             ret)
+{
+	char ** parg;
+
+	if (ctx) {
+		if (fdsrc >= 0)
+			close(fdsrc);
+
+		if (ctx->fdtgt >= 0)
+			close(ctx->fdtgt);
+
+		if (ctx->fdaux >= 0)
+			close(ctx->fdaux);
+
+		if (ctx->fdm4 >= 0)
+			close(ctx->fdm4);
+
+		for (parg=ctx->m4argv; parg && *parg; parg++)
+			free(*parg);
+
+		free(ctx->m4buf);
+		free(ctx->m4argv);
+		free(ctx->auxbuf);
+		free(ctx->pathbuf);
+
+		slbt_lib_free_txtfile_ctx(ctx->acinc);
+		slbt_lib_free_txtfile_ctx(ctx->cfgac);
+		slbt_lib_free_txtfile_ctx(ctx->makam);
+
+		free(ctx);
+	}
+
+	return ret;
+}
+
+int slbt_st_get_stoolie_ctx(
+	const struct slbt_driver_ctx *	dctx,
+	const char *			path,
+	struct slbt_stoolie_ctx **	pctx)
+{
+	struct slbt_stoolie_ctx_impl *	ctx;
+	int                             cint;
+	int                             fdcwd;
+	int                             fdtgt;
+	int                             fdsrc;
+	const char **                   pline;
+	char **                         margv;
+	const char *                    mark;
+	char                            pathbuf[PATH_MAX];
+
+	/* target directory: fd and real path*/
+	fdcwd = slbt_driver_fdcwd(dctx);
+
+	if ((fdtgt = openat(fdcwd,path,O_DIRECTORY|O_CLOEXEC,0)) < 0)
+		return SLBT_SYSTEM_ERROR(dctx,path);
+
+	if (slbt_realpath(fdtgt,".",0,pathbuf,sizeof(pathbuf)) < 0) {
+		close(fdtgt);
+		return SLBT_SYSTEM_ERROR(dctx,path);
+	}
+
+	/* context alloc and init */
+	if (!(ctx = calloc(1,sizeof(*ctx)))) {
+		close(fdtgt);
+		return SLBT_BUFFER_ERROR(dctx);
+	}
+
+	ctx->fdtgt = fdtgt;
+	ctx->fdaux = (-1);
+	ctx->fdm4  = (-1);
+
+	/* target directory real path */
+	if (!(ctx->pathbuf = strdup(pathbuf)))
+		return slbt_st_free_stoolie_ctx_impl(ctx,(-1),
+			SLBT_NESTED_ERROR(dctx));
+
+	/* acinclude.m4, configure.ac, Makefile.am */
+	if ((fdsrc = openat(fdtgt,"acinlcude.m4",O_RDONLY,0)) < 0) {
+		if (errno != ENOENT)
+			return slbt_st_free_stoolie_ctx_impl(ctx,fdsrc,
+				SLBT_SYSTEM_ERROR(dctx,"acinlcude.m4"));
+	} else {
+		if (slbt_impl_get_txtfile_ctx(dctx,"acinclude.m4",fdsrc,&ctx->acinc) < 0)
+			return slbt_st_free_stoolie_ctx_impl(ctx,fdsrc,
+				SLBT_NESTED_ERROR(dctx));
+
+		close(fdsrc);
+	}
+
+	if ((fdsrc = openat(fdtgt,"configure.ac",O_RDONLY,0)) < 0) {
+		if (errno != ENOENT)
+			return slbt_st_free_stoolie_ctx_impl(ctx,fdsrc,
+				SLBT_SYSTEM_ERROR(dctx,"configure.ac"));
+	} else {
+		if (slbt_impl_get_txtfile_ctx(dctx,"configure.ac",fdsrc,&ctx->cfgac) < 0)
+			return slbt_st_free_stoolie_ctx_impl(ctx,fdsrc,
+				SLBT_NESTED_ERROR(dctx));
+
+		close(fdsrc);
+	}
+
+	if ((fdsrc = openat(fdtgt,"Makefile.am",O_RDONLY,0)) < 0) {
+		if (errno != ENOENT)
+			return slbt_st_free_stoolie_ctx_impl(ctx,fdsrc,
+				SLBT_SYSTEM_ERROR(dctx,"Makefile.am"));
+	} else {
+		if (slbt_impl_get_txtfile_ctx(dctx,"Makefile.am",fdsrc,&ctx->makam) < 0)
+			return slbt_st_free_stoolie_ctx_impl(ctx,fdsrc,
+				SLBT_NESTED_ERROR(dctx));
+
+		close(fdsrc);
+	}
+
+	/* aux dir */
+	if (ctx->acinc) {
+		if (slbt_m4fake_expand_cmdarg(
+				dctx,ctx->acinc,
+				"AC_CONFIG_AUX_DIR",
+				&pathbuf) < 0)
+			return slbt_st_free_stoolie_ctx_impl(
+				ctx,(-1),
+				SLBT_NESTED_ERROR(dctx));
+
+		if (pathbuf[0])
+			if (!(ctx->auxbuf = strdup(pathbuf)))
+				return slbt_st_free_stoolie_ctx_impl(
+					ctx,(-1),
+					SLBT_NESTED_ERROR(dctx));
+	}
+
+	/* aux dir */
+	if (!ctx->auxbuf && ctx->cfgac) {
+		if (slbt_m4fake_expand_cmdarg(
+				dctx,ctx->cfgac,
+				"AC_CONFIG_AUX_DIR",
+				&pathbuf) < 0)
+			return slbt_st_free_stoolie_ctx_impl(
+				ctx,(-1),
+				SLBT_NESTED_ERROR(dctx));
+
+		if (pathbuf[0])
+			if (!(ctx->auxbuf = strdup(pathbuf)))
+				return slbt_st_free_stoolie_ctx_impl(
+					ctx,(-1),
+					SLBT_NESTED_ERROR(dctx));
+	}
+
+	/* m4 dir */
+	if (ctx->makam) {
+		for (pline=ctx->makam->txtlinev; !ctx->m4argv && *pline; pline++) {
+			if (!strncmp(*pline,"ACLOCAL_AMFLAGS",15)) {
+				if (isspace((*pline)[15]) || ((*pline)[15] == '=')) {
+					mark = &(*pline)[15];
+
+					for (; isspace(cint = *mark); )
+						mark++;
+
+					if (mark[0] != '=')
+						return slbt_st_free_stoolie_ctx_impl(
+							ctx,(-1),
+							SLBT_CUSTOM_ERROR(
+								dctx,
+								SLBT_ERR_FLOW_ERROR));
+
+					if (slbt_txtline_to_string_vector(++mark,&margv) < 0)
+						return slbt_st_free_stoolie_ctx_impl(
+							ctx,(-1),
+							SLBT_CUSTOM_ERROR(
+								dctx,
+								SLBT_ERR_FLOW_ERROR));
+
+					ctx->m4argv = margv;
+
+					if (!strcmp((mark = margv[0]),"-I")) {
+						ctx->m4buf = strdup(margv[1]);
+
+					} else if (!strncmp(mark,"-I",2)) {
+						ctx->m4buf = strdup(&mark[2]);
+					}
+
+					if (!ctx->m4buf)
+						return slbt_st_free_stoolie_ctx_impl(
+							ctx,(-1),
+							SLBT_CUSTOM_ERROR(
+								dctx,
+								SLBT_ERR_FLOW_ERROR));
+				}
+			}
+		}
+	}
+
+	/* build-aux directory */
+	if ((ctx->fdaux = openat(fdtgt,ctx->auxbuf,O_DIRECTORY,0)) < 0)
+		if (errno == ENOENT)
+			if (!mkdirat(fdtgt,ctx->auxbuf,0755))
+				ctx->fdaux = openat(fdtgt,ctx->auxbuf,O_DIRECTORY,0);
+
+	if (ctx->fdaux < 0)
+		return slbt_st_free_stoolie_ctx_impl(
+			ctx,(-1),
+			SLBT_SYSTEM_ERROR(dctx,ctx->auxbuf));
+
+	/* m4 directory */
+	if ((ctx->fdm4 = openat(fdtgt,ctx->m4buf,O_DIRECTORY,0)) < 0)
+		if (errno == ENOENT)
+			if (!mkdirat(fdtgt,ctx->m4buf,0755))
+				ctx->fdm4 = openat(fdtgt,ctx->m4buf,O_DIRECTORY,0);
+
+	if (ctx->fdm4 < 0)
+		return slbt_st_free_stoolie_ctx_impl(
+			ctx,(-1),
+			SLBT_SYSTEM_ERROR(dctx,ctx->m4buf));
+
+	/* all done */
+	ctx->path        = ctx->pathbuf;
+	ctx->auxarg      = ctx->auxbuf;
+	ctx->m4arg       = ctx->m4buf;
+
+	ctx->zctx.path   = &ctx->path;
+	ctx->zctx.acinc  = ctx->acinc;
+	ctx->zctx.cfgac  = ctx->cfgac;
+	ctx->zctx.makam  = ctx->makam;
+	ctx->zctx.auxarg = &ctx->auxarg;
+	ctx->zctx.m4arg  = &ctx->m4arg;
+
+	*pctx = &ctx->zctx;
+	return 0;
+}
+
+void slbt_st_free_stoolie_ctx(struct slbt_stoolie_ctx * ctx)
+{
+	struct slbt_stoolie_ctx_impl *	ictx;
+	uintptr_t			addr;
+
+	if (ctx) {
+		addr = (uintptr_t)ctx - offsetof(struct slbt_stoolie_ctx_impl,zctx);
+		ictx = (struct slbt_stoolie_ctx_impl *)addr;
+		slbt_st_free_stoolie_ctx_impl(ictx,(-1),0);
+	}
+}