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util: added file_compare() utility function

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file_compare() returns true if two files are the same. It is meant for
small files.

Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Andrew Tridgell 2010-02-11 20:19:40 +11:00
parent d6fb64c512
commit ae95d611b6
2 changed files with 27 additions and 0 deletions
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5
lib/util/util.h
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@ -601,6 +601,11 @@ _PUBLIC_ int vfdprintf(int fd, const char *format, va_list ap) PRINTF_ATTRIBUTE(
_PUBLIC_ int fdprintf(int fd, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
_PUBLIC_ bool large_file_support(const char *path);
/*
compare two files, return true if the two files have the same content
*/
bool file_compare(const char *path1, const char *path2);
/* The following definitions come from lib/util/util.c */

22
lib/util/util_file.c
View File

@ -435,3 +435,25 @@ _PUBLIC_ bool large_file_support(const char *path)
}
/*
compare two files, return true if the two files have the same content
*/
bool file_compare(const char *path1, const char *path2)
{
size_t size1, size2;
char *p1, *p2;
TALLOC_CTX *mem_ctx = talloc_new(NULL);
p1 = file_load(path1, &size1, 0, mem_ctx);
p2 = file_load(path2, &size2, 0, mem_ctx);
if (!p1 || !p2 || size1 != size2) {
talloc_free(mem_ctx);
return false;
}
if (memcmp(p1, p2, size1) != 0) {
talloc_free(mem_ctx);
return false;
}
talloc_free(mem_ctx);
return true;
}