Move lib/util from source4 to top-level libutil.

Conflicts:

	source4/Makefile

1 files changed, 404 insertions, 0 deletions

diff --git a/lib/util/util_file.c b/lib/util/util_file.c
new file mode 100644
index 00000000000..c3e22196c0c
--- /dev/null
+++ b/lib/util/util_file.c
@@ -0,0 +1,404 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * SMB parameters and setup
+ * Copyright (C) Andrew Tridgell 1992-1998 Modified by Jeremy Allison 1995.
+ *
+ * Added afdgets() Jelmer Vernooij 2005
+ * 
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option)
+ * any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ * 
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "includes.h"
+#include "system/shmem.h"
+#include "system/filesys.h"
+
+/**
+ * @file
+ * @brief File-related utility functions
+ */
+
+/**
+read a line from a file with possible \ continuation chars. 
+Blanks at the start or end of a line are stripped.
+The string will be allocated if s2 is NULL
+**/
+_PUBLIC_ char *fgets_slash(char *s2,int maxlen,XFILE *f)
+{
+  char *s=s2;
+  int len = 0;
+  int c;
+  bool start_of_line = true;
+
+  if (x_feof(f))
+    return(NULL);
+
+  if (maxlen <2) return(NULL);
+
+  if (!s2)
+    {
+      maxlen = MIN(maxlen,8);
+      s = (char *)malloc(maxlen);
+    }
+
+  if (!s) return(NULL);
+
+  *s = 0;
+
+  while (len < maxlen-1)
+    {
+      c = x_getc(f);
+      switch (c)
+	{
+	case '\r':
+	  break;
+	case '\n':
+	  while (len > 0 && s[len-1] == ' ')
+	    {
+	      s[--len] = 0;
+	    }
+	  if (len > 0 && s[len-1] == '\\')
+	    {
+	      s[--len] = 0;
+	      start_of_line = true;
+	      break;
+	    }
+	  return(s);
+	case EOF:
+	  if (len <= 0 && !s2) 
+	    SAFE_FREE(s);
+	  return(len>0?s:NULL);
+	case ' ':
+	  if (start_of_line)
+	    break;
+	  /* fall through */
+	default:
+	  start_of_line = false;
+	  s[len++] = c;
+	  s[len] = 0;
+	}
+      if (!s2 && len > maxlen-3)
+	{
+	  char *t;
+	  
+	  maxlen *= 2;
+	  t = realloc_p(s, char, maxlen);
+	  if (!t) {
+	    DEBUG(0,("fgets_slash: failed to expand buffer!\n"));
+	    SAFE_FREE(s);
+	    return(NULL);
+	  } else s = t;
+	}
+    }
+  return(s);
+}
+
+/**
+ * Read one line (data until next newline or eof) and allocate it 
+ */
+_PUBLIC_ char *afdgets(int fd, TALLOC_CTX *mem_ctx, size_t hint)
+{
+	char *data = NULL;
+	ssize_t alloc_size = 0, offset = 0, ret;
+	int p;
+
+	if (hint <= 0) hint = 0x100;
+
+	do {
+		alloc_size += hint;
+
+		data = talloc_realloc(mem_ctx, data, char, alloc_size);
+
+		if (!data)
+			return NULL;
+
+		ret = read(fd, data + offset, hint);
+
+		if (ret == 0) {
+			return NULL;
+		}
+
+		if (ret == -1) {
+			talloc_free(data);
+			return NULL;
+		}
+
+		/* Find newline */
+		for (p = 0; p < ret; p++) {
+			if (data[offset + p] == '\n')
+				break;
+		}
+
+		if (p < ret) {
+			data[offset + p] = '\0';
+
+			/* Go back to position of newline */
+			lseek(fd, p - ret + 1, SEEK_CUR);
+			return data;
+		}
+
+		offset += ret;
+
+	} while (ret == hint);
+
+	data[offset] = '\0';
+
+	return data;
+}
+
+
+/**
+load a file into memory from a fd.
+**/
+_PUBLIC_ 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;
+}
+
+/**
+load a file into memory
+**/
+_PUBLIC_ 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;
+}
+
+
+/**
+mmap (if possible) or read a file
+**/
+_PUBLIC_ void *map_file(const char *fname, size_t size)
+{
+	size_t s2 = 0;
+	void *p = NULL;
+#ifdef HAVE_MMAP
+	int fd;
+	fd = open(fname, O_RDONLY, 0);
+	if (fd == -1) {
+		DEBUG(2,("Failed to load %s - %s\n", fname, strerror(errno)));
+		return NULL;
+	}
+	p = mmap(NULL, size, PROT_READ, MAP_SHARED|MAP_FILE, fd, 0);
+	close(fd);
+	if (p == MAP_FAILED) {
+		DEBUG(1,("Failed to mmap %s - %s\n", fname, strerror(errno)));
+		return NULL;
+	}
+#endif
+	if (!p) {
+		p = file_load(fname, &s2, talloc_autofree_context());
+		if (!p) return NULL;
+		if (s2 != size) {
+			DEBUG(1,("incorrect size for %s - got %d expected %d\n",
+				 fname, (int)s2, (int)size));
+			talloc_free(p);
+			return NULL;
+		}
+	}
+
+	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));
+
+	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;
+	}
+
+	/* remove any blank lines at the end */
+	while (i > 0 && ret[i-1][0] == 0) {
+		i--;
+	}
+
+	if (numlines) *numlines = i;
+
+	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);
+}
+
+/**
+load a fd into memory and return an array of pointers to lines in the file
+must be freed with talloc_free(). If convert is true calls unix_to_dos on
+the list.
+**/
+_PUBLIC_ char **fd_lines_load(int fd, int *numlines, TALLOC_CTX *mem_ctx)
+{
+	char *p;
+	size_t size;
+
+	p = fd_load(fd, &size, mem_ctx);
+	if (!p) return NULL;
+
+	return file_lines_parse(p, size, numlines, mem_ctx);
+}
+
+
+/**
+take a list of lines and modify them to produce a list where \ continues
+a line
+**/
+_PUBLIC_ void file_lines_slashcont(char **lines)
+{
+	int i, j;
+
+	for (i=0; lines[i];) {
+		int len = strlen(lines[i]);
+		if (lines[i][len-1] == '\\') {
+			lines[i][len-1] = ' ';
+			if (lines[i+1]) {
+				char *p = &lines[i][len];
+				while (p < lines[i+1]) *p++ = ' ';
+				for (j = i+1; lines[j]; j++) lines[j] = lines[j+1];
+			}
+		} else {
+			i++;
+		}
+	}
+}
+
+/**
+  save a lump of data into a file. Mostly used for debugging 
+*/
+_PUBLIC_ bool file_save(const char *fname, const void *packet, size_t length)
+{
+	int fd;
+	fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0644);
+	if (fd == -1) {
+		return false;
+	}
+	if (write(fd, packet, length) != (size_t)length) {
+		return false;
+	}
+	close(fd);
+	return true;
+}
+
+_PUBLIC_ int vfdprintf(int fd, const char *format, va_list ap)
+{
+	char *p;
+	int len, ret;
+	va_list ap2;
+
+	va_copy(ap2, ap);
+	len = vasprintf(&p, format, ap2);
+	va_end(ap2);
+	if (len <= 0) return len;
+	ret = write(fd, p, len);
+	SAFE_FREE(p);
+	return ret;
+}
+
+_PUBLIC_ int fdprintf(int fd, const char *format, ...)
+{
+	va_list ap;
+	int ret;
+
+	va_start(ap, format);
+	ret = vfdprintf(fd, format, ap);
+	va_end(ap);
+	return ret;
+}
+
+
+/*
+  try to determine if the filesystem supports large files
+*/
+_PUBLIC_ bool large_file_support(const char *path)
+{
+	int fd;
+	ssize_t ret;
+	char c;
+
+	fd = open(path, O_RDWR|O_CREAT, 0600);
+	unlink(path);
+	if (fd == -1) {
+		/* have to assume large files are OK */
+		return true;
+	}
+	ret = pread(fd, &c, 1, ((uint64_t)1)<<32);
+	close(fd);
+	return ret == 0;
+}