move more util code to lib/util

(This used to be ctdb commit de5ab0584c978a6be4afeacd80c84015b206a3c6)

1 files changed, 116 insertions, 0 deletions

diff --git a/ctdb/lib/util/util_file.c b/ctdb/lib/util/util_file.c
new file mode 100644
index 0000000000..e9050fb25f
--- /dev/null
+++ b/ctdb/lib/util/util_file.c
@@ -0,0 +1,116 @@
+/*
+  functions taken from samba4 for quick prototyping of ctdb. These are
+  not intended to remain part of ctdb
+*/
+
+#include "includes.h"
+#include "system/filesys.h"
+
+
+static char *fd_load(int fd, size_t *size, TALLOC_CTX *mem_ctx)
+{
+	struct stat sbuf;
+	char *p;
+
+	if (fstat(fd, &sbuf) != 0) return NULL;
+
+	p = (char *)talloc_size(mem_ctx, sbuf.st_size+1);
+	if (!p) return NULL;
+
+	if (read(fd, p, sbuf.st_size) != sbuf.st_size) {
+		talloc_free(p);
+		return NULL;
+	}
+	p[sbuf.st_size] = 0;
+
+	if (size) *size = sbuf.st_size;
+
+	return p;
+}
+
+
+static char *file_load(const char *fname, size_t *size, TALLOC_CTX *mem_ctx)
+{
+	int fd;
+	char *p;
+
+	if (!fname || !*fname) return NULL;
+	
+	fd = open(fname,O_RDONLY);
+	if (fd == -1) return NULL;
+
+	p = fd_load(fd, size, mem_ctx);
+
+	close(fd);
+
+	return p;
+}
+
+
+/**
+parse a buffer into lines
+'p' will be freed on error, and otherwise will be made a child of the returned array
+**/
+static char **file_lines_parse(char *p, size_t size, int *numlines, TALLOC_CTX *mem_ctx)
+{
+	int i;
+	char *s, **ret;
+
+	if (!p) return NULL;
+
+	for (s = p, i=0; s < p+size; s++) {
+		if (s[0] == '\n') i++;
+	}
+
+	ret = talloc_array(mem_ctx, char *, i+2);
+	if (!ret) {
+		talloc_free(p);
+		return NULL;
+	}	
+	
+	talloc_steal(ret, p);
+	
+	memset(ret, 0, sizeof(ret[0])*(i+2));
+	if (numlines) *numlines = i;
+
+	ret[0] = p;
+	for (s = p, i=0; s < p+size; s++) {
+		if (s[0] == '\n') {
+			s[0] = 0;
+			i++;
+			ret[i] = s+1;
+		}
+		if (s[0] == '\r') s[0] = 0;
+	}
+
+	return ret;
+}
+
+
+/**
+load a file into memory and return an array of pointers to lines in the file
+must be freed with talloc_free(). 
+**/
+_PUBLIC_ char **file_lines_load(const char *fname, int *numlines, TALLOC_CTX *mem_ctx)
+{
+	char *p;
+	size_t size;
+
+	p = file_load(fname, &size, mem_ctx);
+	if (!p) return NULL;
+
+	return file_lines_parse(p, size, numlines, mem_ctx);
+}
+
+char *hex_encode(TALLOC_CTX *mem_ctx, const unsigned char *buff_in, size_t len)
+{
+	int i;
+	char *hex_buffer;
+
+	hex_buffer = talloc_array(mem_ctx, char, (len*2)+1);
+
+	for (i = 0; i < len; i++)
+		slprintf(&hex_buffer[i*2], 3, "%02X", buff_in[i]);
+
+	return hex_buffer;
+}