1 files changed, 124 insertions, 0 deletions
diff --git a/descend.c b/descend.c
new file mode 100644
index 0000000..9ada7b4
--- /dev/null
+++ b/descend.c
@@ -0,0 +1,124 @@
+#include "internal.h"
+#include <stdio.h>
+#include <dirent.h>
+#include <string.h>
+#include <errno.h>
+
+
+static int 
+noDots(const struct dirent * e)
+{
+	if ( e->d_name[0] == '.'
+	 && (e->d_name[1] == '\0'
+	  || (e->d_name[1] == '.' && e->d_name[2] == '\0')) )
+		return 0;
+	else
+		return 1;
+}
+
+extern int
+descend(
+ struct FileInfo *oldInfo
+,int 		(*function)(const struct FileInfo * i))
+{
+	char			pathname[1024];
+	struct dirent * *	names;
+	struct dirent * *	n;
+	int			length;
+	char *			filename;
+	int			status = 0;
+	int			count;
+
+	if ( *oldInfo->source == '\0' ) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if ( oldInfo->stat.st_dev == 0
+	 && oldInfo->stat.st_ino == 0
+	 && oldInfo->stat.st_mode == 0 ) {
+		if ( lstat(oldInfo->source, &oldInfo->stat) != 0 )
+			return -1;
+		oldInfo->isSymbolicLink = ((oldInfo->stat.st_mode & S_IFMT) == S_IFLNK);
+
+		if ( oldInfo->isSymbolicLink )
+			if ( stat(oldInfo->source, &oldInfo->stat) != 0 )
+				memset((void *)&oldInfo->stat, 0, sizeof(oldInfo->stat));
+	}
+
+	if ( !oldInfo->processDirectoriesAfterTheirContents ) {
+		if ( function )
+			status = (*function)(oldInfo);
+		if ( status == 0 )
+			status = post_process(oldInfo);
+	}
+
+	if ( (count = scandir(oldInfo->source, &names, noDots, alphasort)) < 0 )
+		return -1;
+
+	length = strlen(oldInfo->source);
+	if ( oldInfo->source[length-1] == '/' )
+		length--;
+
+	memcpy(pathname, oldInfo->source, length+1);
+	pathname[length] = '/';
+	filename = &pathname[length+1];
+	
+	n = names;
+	while ( count-- > 0 ) {
+		struct FileInfo		i = *oldInfo;
+
+		strcpy(filename, (*n)->d_name);
+		free(*n++);
+
+		if ( lstat(pathname, &i.stat) != 0 && errno != ENOENT ) {
+			fprintf(stderr, "Can't stat %s: %s\n", pathname, strerror(errno));
+			return -1;
+		}
+		i.isSymbolicLink = ((i.stat.st_mode & S_IFMT) == S_IFLNK);
+
+		if ( i.isSymbolicLink )
+			if ( stat(pathname, &i.stat) != 0 )
+				memset((void *)&i.stat, 0, sizeof(i.stat));
+
+		i.source = pathname;
+
+		if ( i.dyadic ) {
+			char	d[1024];
+
+			i.destination = join_paths(d, i.destination, &i.source[i.directoryLength]);
+		}
+		else
+			i.destination = i.source;
+
+		 if ( !i.isSymbolicLink && (i.stat.st_mode & S_IFMT) == S_IFDIR )
+			status = descend(&i, function);
+		else {
+			if ( function )
+				status = (*function)(&i);
+			if ( status == 0 )
+				status = post_process(&i);
+		}
+
+		if ( !i.processDirectoriesAfterTheirContents
+		 && status == 0
+		 && (i.stat.st_mode & S_IFMT) == S_IFDIR )
+			descend(&i, function);
+
+		if ( status != 0 && !i.force ) {
+			while ( count-- > 0 )
+				free(*n++);
+			break;
+		}
+	}
+	free(names);
+
+	if ( oldInfo->processDirectoriesAfterTheirContents ) {
+		if ( function )
+			status = (*function)(oldInfo);
+		if ( status == 0 )
+			status = post_process(oldInfo);
+	}
+
+	return status;
+}