Treat file names in POSIX-like case-sensitive fashion by default

*** THIS COMMIT CAUSES A CHANGE OF DEFAULT BEHAVIOR IN libsmbclient!!! ***

- libsmbclient now calls cli_set_case_sensitive() for a new CLI. By default,
  it requests case-sensitive, but the old behavior of case-insensitive can be
  requested with smbc_setOptionCaseSensitive(context, False);

  The change of behavior is considered a bug fix, as it was previously
  possible to accidentally overwrite a file that had the same case-insensitive
  name but a different case-sensitive name as a previously-existing file,
  while creating a new file.

Derrell
(cherry picked from commit ac4baafeb8d74bf1db7f2ce84b2bc3abdef90337)

5 files changed, 37 insertions, 1 deletions

diff --git a/source/include/libsmb_internal.h b/source/include/libsmb_internal.h
index 7cf03307123..307d6b261d2 100644
--- a/source/include/libsmb_internal.h
+++ b/source/include/libsmb_internal.h
@@ -176,6 +176,11 @@ struct SMBC_internal_data {
          */
         smbc_smb_encrypt_level                  smb_encryption_level;
 
+        /*
+         * Should we request case sensitivity of file names?
+         */
+        bool                                    case_sensitive;
+
         struct smbc_server_cache * server_cache;
 
         /* POSIX emulation functions */
diff --git a/source/include/libsmbclient.h b/source/include/libsmbclient.h
index 74d0d5c9ddb..da2e03cf080 100644
--- a/source/include/libsmbclient.h
+++ b/source/include/libsmbclient.h
@@ -550,6 +550,15 @@ smbc_getOptionSmbEncryptionLevel(SMBCCTX *c);
 void
 smbc_setOptionSmbEncryptionLevel(SMBCCTX *c, smbc_smb_encrypt_level level);
 
+/** Get whether to treat file names as case-sensitive. */
+smbc_bool
+smbc_getOptionCaseSensitive(SMBCCTX *c);
+
+/** Set whether to treat file names as case-sensitive. */
+void
+smbc_setOptionCaseSensitive(SMBCCTX *c, smbc_bool b);
+
+
 /**
  * Get from how many local master browsers should the list of workgroups be
  * retrieved.  It can take up to 12 minutes or longer after a server becomes a
diff --git a/source/libsmb/libsmb_context.c b/source/libsmb/libsmb_context.c
index 5e075d10d6d..ec42b34e4d3 100644
--- a/source/libsmb/libsmb_context.c
+++ b/source/libsmb/libsmb_context.c
@@ -69,6 +69,7 @@ smbc_new_context(void)
         smbc_setOptionFullTimeNames(context, False);
         smbc_setOptionOpenShareMode(context, SMBC_SHAREMODE_DENY_NONE);
         smbc_setOptionSmbEncryptionLevel(context, SMBC_ENCRYPTLEVEL_NONE);
+        smbc_setOptionCaseSensitive(context, True);
         smbc_setOptionBrowseMaxLmbCount(context, 3);    /* # LMBs to query */
         smbc_setOptionUrlEncodeReaddirEntries(context, False);
         smbc_setOptionOneSharePerServer(context, False);
diff --git a/source/libsmb/libsmb_server.c b/source/libsmb/libsmb_server.c
index 4581d8452a0..d374ac12544 100644
--- a/source/libsmb/libsmb_server.c
+++ b/source/libsmb/libsmb_server.c
@@ -355,7 +355,14 @@ again:
 		errno = ENOMEM;
 		return NULL;
 	}
-        
+
+	/* POSIX-like - always request case-sensitivity by default. */        
+        if (smbc_getOptionCaseSensitive(context)) {
+            cli_set_case_sensitive(c, True);
+        } else {
+            cli_set_case_sensitive(c, False);
+        }
+
         if (smbc_getOptionUseKerberos(context)) {
 		c->use_kerberos = True;
 	}
diff --git a/source/libsmb/libsmb_setget.c b/source/libsmb/libsmb_setget.c
index d0823bd77ec..bca2a80d14b 100644
--- a/source/libsmb/libsmb_setget.c
+++ b/source/libsmb/libsmb_setget.c
@@ -193,6 +193,20 @@ smbc_setOptionSmbEncryptionLevel(SMBCCTX *c, smbc_smb_encrypt_level level)
         c->internal->smb_encryption_level = level;
 }
 
+/** Get whether to treat file names as case-sensitive. */
+smbc_bool
+smbc_getOptionCaseSensitive(SMBCCTX *c)
+{
+        return c->internal->case_sensitive;
+}
+
+/** Set whether to treat file names as case-sensitive. */
+void
+smbc_setOptionCaseSensitive(SMBCCTX *c, smbc_bool b)
+{
+        c->internal->case_sensitive = b;
+}
+
 /**
  * Get from how many local master browsers should the list of workgroups be
  * retrieved.  It can take up to 12 minutes or longer after a server becomes a