From f6901aab1fb07f8ee807afb7b76a3c69ff6a9370 Mon Sep 17 00:00:00 2001
From: sinanmohd <sinan@firemail.cc>
Date: Fri, 19 May 2023 13:17:33 +0530
Subject: 8.5: initial commit

---
 8.5/Makefile | 12 +++++++++++
 8.5/fsize.c  | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 8.5/fsize.h  |  1 +
 8.5/main.c   | 12 +++++++++++
 4 files changed, 93 insertions(+)
 create mode 100644 8.5/Makefile
 create mode 100644 8.5/fsize.c
 create mode 100644 8.5/fsize.h
 create mode 100644 8.5/main.c

diff --git a/8.5/Makefile b/8.5/Makefile
new file mode 100644
index 0000000..fc7953f
--- /dev/null
+++ b/8.5/Makefile
@@ -0,0 +1,12 @@
+OBJECTS = main.o fsize.o
+CC = gcc
+CFLAGS = -Wvla -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes -fsanitize=address
+
+fsize: $(OBJECTS)
+	$(CC) $(CFLAGS) -o fsize $(OBJECTS)
+
+main.o: fsize.h
+
+.PHONY: clean
+clean:
+	rm -f fsize $(OBJECTS)
diff --git a/8.5/fsize.c b/8.5/fsize.c
new file mode 100644
index 0000000..96dd683
--- /dev/null
+++ b/8.5/fsize.c
@@ -0,0 +1,68 @@
+#include <sys/stat.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <string.h>
+#include <time.h>
+#include "fsize.h"
+
+#define MAX_PATH	1024
+
+static void dirwalk(char *name);
+static void error(char *fmt, ...);
+
+void fsize(char *name)
+{
+	struct stat buf;
+
+	if (stat(name, &buf) == -1) {
+		error("fsize: can't access %s", name);
+		return;
+	}
+
+	if ((buf.st_mode & S_IFMT) == S_IFDIR)
+		dirwalk(name);
+
+	printf("%10ld %4d %4d %ld %s\n", buf.st_size, buf.st_uid,
+	     buf.st_gid, buf.st_ctim.tv_sec, name);
+}
+
+static void dirwalk(char *dir)
+{
+	char path[MAX_PATH];
+	DIR *dfd;
+	struct dirent *dp;
+
+	if ((dfd = opendir(dir)) == NULL) {
+		error("dirwalk: can't open %s", dir);
+		return;
+	}
+
+	while ((dp = readdir(dfd)) != NULL) {
+		if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
+			continue;
+
+		
+		if (strlen(dp->d_name) + strlen(dir) + 2 > MAX_PATH) {
+			error("dirwalk: name %s/%s too long", dir, path);
+		} else {
+			sprintf(path, "%s/%s", dir, dp->d_name);
+			fsize(path);
+		}
+	}
+
+	closedir(dfd);
+}
+
+static void error(char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	fprintf(stderr, "error: ");
+	vfprintf(stderr,fmt, args);
+	putc('\n', stderr);
+	va_end(args);
+}
diff --git a/8.5/fsize.h b/8.5/fsize.h
new file mode 100644
index 0000000..8844d5e
--- /dev/null
+++ b/8.5/fsize.h
@@ -0,0 +1 @@
+void fsize(char *name);
diff --git a/8.5/main.c b/8.5/main.c
new file mode 100644
index 0000000..4a9ed19
--- /dev/null
+++ b/8.5/main.c
@@ -0,0 +1,12 @@
+#include "fsize.h"
+
+int main(int argc, char *argv[])
+{
+	if (argc == 1)
+		fsize(".");
+	else
+	 	while (--argc > 0)
+			fsize(*++argv);
+
+	return 0;
+}
-- 
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