From 59d34ee47b14c728ebd6399fb89c409383a1aa2e Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Fri, 11 Jul 2008 00:04:58 +0200
Subject: Initial import

---
 direct-append.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 direct-append.c

(limited to 'direct-append.c')

diff --git a/direct-append.c b/direct-append.c
new file mode 100644
index 0000000..bf18c72
--- /dev/null
+++ b/direct-append.c
@@ -0,0 +1,71 @@
+/*
+ * Append some random characters to a file
+ *
+ * Just a small tool to debug inotify
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#define DEFAULT_N_CHARS 1024
+
+static char get_random_printable_char(void)
+{
+	int fd;
+	char ret;
+
+	fd = open("/dev/urandom", O_RDONLY);
+	if (fd < 0) {
+		perror("open");
+		exit(EXIT_FAILURE);
+	}
+
+	do {
+		read(fd, &ret, sizeof(ret));
+	} while (ret < 0x20 || ret > 0x7e);
+
+	close(fd);
+
+	return ret;
+}
+
+int main(int argc, char *argv[])
+{
+	int fd, n_chars, i;
+	char *str;
+
+	if (argc < 3) {
+		fprintf(stderr, "Usage: %s <file> <n_chars>\n", argv[0]);
+		exit(EXIT_FAILURE);
+	}
+
+	/* Open the file, create it in case it doesn't exist */
+	if ((fd = open(argv[1], O_CREAT|O_WRONLY, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0) {
+		perror("open");
+		exit(EXIT_FAILURE);
+	}
+
+	if (lseek(fd, 0, SEEK_END) < 0) {
+		perror("lseek");
+		exit(EXIT_FAILURE);
+	}
+
+	n_chars = strtoul(argv[2], NULL, 0);
+	if (n_chars <= 0)
+		n_chars = DEFAULT_N_CHARS;
+
+	str = malloc(n_chars * sizeof(char));
+
+	for (i = 0; i < n_chars; i++)
+		str[i] = get_random_printable_char();
+
+	write(fd, str, n_chars);
+	free(str);
+	close(fd);
+
+	exit(EXIT_SUCCESS);
+}
-- 
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