uninstall mode: initial implementation.

1 files changed, 348 insertions, 0 deletions

diff --git a/src/logic/slbt_exec_uninstall.c b/src/logic/slbt_exec_uninstall.c
new file mode 100644
index 0000000..2e54f79
--- /dev/null
+++ b/src/logic/slbt_exec_uninstall.c
@@ -0,0 +1,348 @@
+/*******************************************************************/
+/*  slibtool: a skinny libtool implementation, written in C        */
+/*  Copyright (C) 2016  Z. Gilboa                                  */
+/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
+/*******************************************************************/
+
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+#define ARGV_DRIVER
+
+#include <slibtool/slibtool.h>
+#include "slibtool_uninstall_impl.h"
+#include "slibtool_readlink_impl.h"
+#include "slibtool_errinfo_impl.h"
+#include "argv/argv.h"
+
+static int slbt_uninstall_usage(
+	const char *			program,
+	const char *			arg,
+	const struct argv_option *	options,
+	struct argv_meta *		meta)
+{
+	char header[512];
+
+	snprintf(header,sizeof(header),
+		"Usage: %s --mode=uninstall <rm> [options] [DEST]...\n"
+		"Options:\n",
+		program);
+
+	argv_usage(stdout,header,options,arg);
+	argv_free(meta);
+
+	return SLBT_USAGE;
+}
+
+static int slbt_exec_uninstall_fail(
+	struct slbt_exec_ctx *	actx,
+	struct argv_meta *	meta,
+	int			ret)
+{
+	argv_free(meta);
+	slbt_free_exec_ctx(actx);
+	return ret;
+}
+
+static int slbt_exec_uninstall_fs_entry(
+	const struct slbt_driver_ctx *	dctx,
+	struct slbt_exec_ctx *		ectx,
+	char **				parg,
+	char *				path,
+	uint32_t			flags)
+{
+	struct stat	st;
+	char *		slash;
+	char		dpath[PATH_MAX];
+
+	/* needed? */
+	if (stat(path,&st) && (errno == ENOENT))
+		if (lstat(path,&st) && (errno == ENOENT))
+			return 0;
+
+	/* output */
+	*parg = path;
+
+	if (!(dctx->cctx->drvflags & SLBT_DRIVER_SILENT))
+		if (slbt_output_uninstall(dctx,ectx))
+			return SLBT_NESTED_ERROR(dctx);
+
+	/* directory? */
+	if (S_ISDIR(st.st_mode)) {
+		if (!(rmdir(path)))
+			return 0;
+
+		else if ((errno == EEXIST) || (errno == ENOTEMPTY))
+			return 0;
+
+		else
+			return SLBT_SYSTEM_ERROR(dctx);
+	}
+
+	/* remove file or symlink entry */
+	if (unlink(path))
+		return SLBT_SYSTEM_ERROR(dctx);
+
+	/* remove empty containing directory? */
+	if (flags & SLBT_UNINSTALL_RMDIR) {
+		strcpy(dpath,path);
+
+		/* invalid (current) directory? */
+		if (!(slash = strrchr(dpath,'/')))
+			return 0;
+
+		*slash = 0;
+
+		if (rmdir(dpath))
+			return SLBT_SYSTEM_ERROR(dctx);
+	}
+
+	return 0;
+}
+
+static int slbt_exec_uninstall_versioned_library(
+	const struct slbt_driver_ctx *	dctx,
+	struct slbt_exec_ctx *		ectx,
+	char **				parg,
+	char *				rpath,
+	char *				lpath,
+	const char *			suffix,
+	uint32_t			flags)
+{
+	char *	slash;
+	char *	dot;
+	char *	path;
+	char	apath[PATH_MAX];
+
+	/* normalize library link path */
+	if (lpath[0] == '/') {
+		path = lpath;
+
+	} else if (!(slash = strrchr(rpath,'/'))) {
+		path = lpath;
+
+	} else {
+		strcpy(apath,rpath);
+		strcpy(&apath[slash-rpath+1],lpath);
+		path = apath;
+	}
+
+	/* delete associated version files */
+	while ((dot = strrchr(path,'.')) && (strcmp(dot,suffix))) {
+		if (slbt_exec_uninstall_fs_entry(dctx,ectx,parg,path,flags))
+			return SLBT_NESTED_ERROR(dctx);
+
+		*dot = 0;
+	}
+
+	return 0;
+}
+
+static int slbt_exec_uninstall_entry(
+	const struct slbt_driver_ctx *	dctx,
+	struct slbt_exec_ctx *		ectx,
+	struct argv_entry *		entry,
+	char **				parg,
+	uint32_t			flags)
+{
+	char	path [PATH_MAX];
+	char	lpath[PATH_MAX];
+	char *	dot;
+
+	if ((size_t)snprintf(path,PATH_MAX,"%s",
+			entry->arg) >= PATH_MAX-8)
+		return SLBT_BUFFER_ERROR(dctx);
+
+	*parg = (char *)entry->arg;
+
+	/* remove explicit argument */
+	if (slbt_exec_uninstall_fs_entry(dctx,ectx,parg,path,flags))
+		return SLBT_NESTED_ERROR(dctx);
+
+	/* non-.la-wrapper argument? */
+	if (!(dot = strrchr(path,'.')))
+		return 0;
+
+	else if (strcmp(dot,".la"))
+		return 0;
+
+	/* remove .a archive as needed */
+	strcpy(dot,".a");
+
+	if (slbt_exec_uninstall_fs_entry(dctx,ectx,parg,path,flags))
+		return SLBT_NESTED_ERROR(dctx);
+
+	/* .so symlink? */
+	strcpy(dot,".so");
+
+	if (!(slbt_readlink(path,lpath,sizeof(lpath))))
+		if (slbt_exec_uninstall_versioned_library(
+				dctx,ectx,parg,
+				path,lpath,
+				".so",flags))
+			return SLBT_NESTED_ERROR(dctx);
+
+	/* .lib.a symlink? */
+	strcpy(dot,".lib.a");
+
+	if (!(slbt_readlink(path,lpath,sizeof(lpath))))
+		if (slbt_exec_uninstall_versioned_library(
+				dctx,ectx,parg,
+				path,lpath,
+				".lib.a",flags))
+			return SLBT_NESTED_ERROR(dctx);
+
+	/* .dll symlink? */
+	strcpy(dot,".dll");
+
+	if (!(slbt_readlink(path,lpath,sizeof(lpath))))
+		if (slbt_exec_uninstall_versioned_library(
+				dctx,ectx,parg,
+				path,lpath,
+				".dll",flags))
+			return SLBT_NESTED_ERROR(dctx);
+
+	/* remove .so library as needed */
+	strcpy(dot,".so");
+
+	if (slbt_exec_uninstall_fs_entry(dctx,ectx,parg,path,flags))
+		return SLBT_NESTED_ERROR(dctx);
+
+	/* remove .lib.a import library as needed */
+	strcpy(dot,".lib.a");
+
+	if (slbt_exec_uninstall_fs_entry(dctx,ectx,parg,path,flags))
+		return SLBT_NESTED_ERROR(dctx);
+
+	/* remove .dll library as needed */
+	strcpy(dot,".dll");
+
+	if (slbt_exec_uninstall_fs_entry(dctx,ectx,parg,path,flags))
+		return SLBT_NESTED_ERROR(dctx);
+
+	/* remove .exe image as needed */
+	strcpy(dot,".exe");
+
+	if (slbt_exec_uninstall_fs_entry(dctx,ectx,parg,path,flags))
+		return SLBT_NESTED_ERROR(dctx);
+
+	/* remove binary image as needed */
+	*dot = 0;
+
+	if (slbt_exec_uninstall_fs_entry(dctx,ectx,parg,path,flags))
+		return SLBT_NESTED_ERROR(dctx);
+
+	return 0;
+}
+
+int slbt_exec_uninstall(
+	const struct slbt_driver_ctx *	dctx,
+	struct slbt_exec_ctx *		ectx)
+{
+	int				ret;
+	char **				argv;
+	char **				iargv;
+	uint32_t			flags;
+	struct slbt_exec_ctx *		actx;
+	struct argv_meta *		meta;
+	struct argv_entry *		entry;
+	const struct argv_option *	options = slbt_uninstall_options;
+
+	/* dry run */
+	if (dctx->cctx->drvflags & SLBT_DRIVER_DRY_RUN)
+		return 0;
+
+	/* context */
+	if (ectx)
+		actx = 0;
+	else if ((ret = slbt_get_exec_ctx(dctx,&ectx)))
+		return ret;
+	else
+		actx = ectx;
+
+	/* initial state, uninstall mode skin */
+	slbt_reset_arguments(ectx);
+	slbt_disable_placeholders(ectx);
+	iargv = ectx->cargv;
+
+	/* work around non-conforming uses of --mode=uninstall */
+	if (!(strcmp(iargv[0],"/bin/sh")) || !strcmp(iargv[0],"/bin/bash"))
+		iargv++;
+
+	/* missing arguments? */
+	if (!iargv[1] && (dctx->cctx->drvflags & SLBT_DRIVER_VERBOSITY_USAGE))
+		return slbt_uninstall_usage(dctx->program,0,options,0);
+
+	/* <uninstall> argv meta */
+	if (!(meta = argv_get(
+			iargv,
+			options,
+			dctx->cctx->drvflags & SLBT_DRIVER_VERBOSITY_ERRORS
+				? ARGV_VERBOSITY_ERRORS
+				: ARGV_VERBOSITY_NONE)))
+		return slbt_exec_uninstall_fail(
+			actx,meta,
+			SLBT_CUSTOM_ERROR(dctx,0));
+
+	/* dest, alternate argument vector options */
+	argv  = ectx->altv;
+	flags = 0;
+
+	*argv++ = iargv[0];
+
+	for (entry=meta->entries; entry->fopt || entry->arg; entry++) {
+		if (entry->fopt) {
+			switch (entry->tag) {
+				case TAG_UNINSTALL_HELP:
+					flags |= SLBT_UNINSTALL_HELP;
+					break;
+
+				case TAG_UNINSTALL_VERSION:
+					flags |= SLBT_UNINSTALL_VERSION;
+					break;
+
+				case TAG_UNINSTALL_FORCE:
+					*argv++ = "-f";
+					flags |= SLBT_UNINSTALL_FORCE;
+					break;
+
+				case TAG_UNINSTALL_RMDIR:
+					*argv++ = "-d";
+					flags |= SLBT_UNINSTALL_RMDIR;
+					break;
+
+				case TAG_UNINSTALL_VERBOSE:
+					*argv++ = "-v";
+					flags |= SLBT_UNINSTALL_VERBOSE;
+					break;
+			}
+		}
+	}
+
+	/* --help */
+	if (flags & SLBT_UNINSTALL_HELP) {
+		slbt_uninstall_usage(dctx->program,0,options,meta);
+		return 0;
+	}
+
+	/* uninstall */
+	ectx->argv    = ectx->altv;
+	ectx->program = ectx->altv[0];
+
+	/* uninstall entries one at a time */
+	for (entry=meta->entries; entry->fopt || entry->arg; entry++)
+		if (!entry->fopt)
+			if (slbt_exec_uninstall_entry(dctx,ectx,entry,argv,flags))
+				return slbt_exec_uninstall_fail(
+					actx,meta,
+					SLBT_NESTED_ERROR(dctx));
+
+	argv_free(meta);
+	slbt_free_exec_ctx(actx);
+
+	return 0;
+}