From 5ea1d7cd4b630a91b4a72fb722a937a107d76fc0 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sat, 13 Jul 2024 05:03:48 +0000
Subject: driver: -s <replstr> support: implementation and integration.

---
 src/logic/tpax_archive_write.c | 44 ++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 42 insertions(+), 2 deletions(-)

(limited to 'src/logic')

diff --git a/src/logic/tpax_archive_write.c b/src/logic/tpax_archive_write.c
index 32a5f2c..a881bd9 100644
--- a/src/logic/tpax_archive_write.c
+++ b/src/logic/tpax_archive_write.c
@@ -75,6 +75,35 @@ static int tpax_archive_write_ret(
 	return ret;
 }
 
+static int tpax_apply_string_replacement(
+	const struct tpax_driver_ctx *  dctx,
+	const char *                    path,
+	char *                          replbuf,
+	size_t                          buflen)
+{
+	int                            ret;
+	struct tpax_driver_ctx_impl *  ictx;
+	struct tpax_replstr *          replstrv;
+
+	ictx = tpax_get_driver_ictx(dctx);
+
+	if (!(replstrv = ictx->replstrv))
+		return 0;
+
+	for (ret=0; !ret && replstrv->regexp; replstrv++) {
+		ret = tpax_util_path_replstr(
+			replbuf,path,
+			replstrv->replstr,
+			&replstrv->regex,
+			buflen,replstrv->flags);
+
+		if ((ret > 0) && (replstrv->flags & TPAX_REPL_PRINT))
+			tpax_dprintf(tpax_driver_fderr(dctx),"%s >> %s\n",path,replbuf);
+	}
+
+	return ret;
+}
+
 static int tpax_archive_write_impl(
 	const struct tpax_driver_ctx *  dctx,
 	const struct tpax_dirent *      cdent,
@@ -85,12 +114,14 @@ static int tpax_archive_write_impl(
 	struct tpax_ustar_header        uhdr;
 	const struct stat *             st;
 	struct stat                     stbuf;
+	const  char *                   apath;
 	const  char *                   path;
 	const  char *                   slnk;
 	const  char *                   mlnk;
 	off_t                           hpos;
 	off_t                           dpos;
 	int                             fdtmp;
+	int                             slen;
 	ssize_t                         nread;
 	ssize_t                         nbytes;
 	void *                          buf;
@@ -98,6 +129,7 @@ static int tpax_archive_write_impl(
 	size_t                          cmplen;
 	void *				membuf;
 	char *                          ch;
+	char                           	replbuf[PATH_MAX];
 	char                           	pathbuf[PATH_MAX];
 
 	/* followed symlink? */
@@ -110,9 +142,17 @@ static int tpax_archive_write_impl(
 			dctx,
 			TPAX_ERR_FLOW_ERROR);
 
+	/* regex matching and patter substitution */
+	if ((slen = tpax_apply_string_replacement(dctx,path,replbuf,PATH_MAX)) < 0)
+		return TPAX_CUSTOM_ERROR(
+			dctx,
+			TPAX_ERR_FLOW_ERROR);
+
+	apath = slen ? replbuf : path;
+
 	/* verbose mode */
 	if (dctx->cctx->drvflags & TPAX_DRIVER_VERBOSE)
-		tpax_dprintf(tpax_driver_fderr(dctx),"%s",path);
+		tpax_dprintf(tpax_driver_fderr(dctx),"%s",apath);
 
 	/* uctx */
 	if (tpax_lib_get_unit_ctx(dctx,fdcwd,path,&uctx) < 0)
@@ -171,7 +211,7 @@ static int tpax_archive_write_impl(
 
 	/* header */
 	if (tpax_meta_init_ustar_header(
-			dctx,path,st,
+			dctx,apath,st,
 			slnk,&uhdr) < 0)
 		return tpax_archive_write_ret(
 			TPAX_NESTED_ERROR(dctx),
-- 
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