add a test program for the new ftruncate functionality

(This used to be commit df995eddbddec80a0d9d4659bbb9c6ca8a45d02b)

examples/libsmbclient/Makefile

@@ -24,6 +24,7 @@ TESTS=	testsmbc \
 	teststat \
 	teststat2 \
 	teststat3 \
+	testtruncate \
 	testchmod \
 	testutime \
 	testread \
@@ -73,6 +74,10 @@ teststat3: teststat3.o
 	@echo Linking teststat3
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LIBSMBCLIENT) -lpopt
 
+testtruncate: testtruncate.o
+	@echo Linking testtruncate
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LIBSMBCLIENT) -lpopt
+
 testchmod: testchmod.o
 	@echo Linking testchmod
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LIBSMBCLIENT) -lpopt

examples/libsmbclient/testtruncate.c

@@ -0,0 +1,82 @@
+#include <stdio.h> 
+#include <unistd.h>
+#include <string.h> 
+#include <time.h> 
+#include <errno.h>
+#include <libsmbclient.h> 
+#include "get_auth_data_fn.h"
+
+
+int main(int argc, char * argv[]) 
+{ 
+    int             fd;
+    int             ret;
+    int             debug = 0;
+    int             savedErrno;
+    char            buffer[128];
+    char *          pSmbPath = NULL;
+    char *          pLocalPath = NULL;
+    struct stat     st; 
+    
+    if (argc != 2)
+    {
+        printf("usage: "
+               "%s smb://path/to/file\n",
+               argv[0]);
+        return 1;
+    }
+
+    smbc_init(get_auth_data_fn, debug); 
+    
+    if ((fd = smbc_open(argv[1], O_WRONLY | O_CREAT | O_TRUNC, 0)) < 0)
+    {
+        perror("smbc_open");
+        return 1;
+    }
+
+    strcpy(buffer, "Hello world.\nThis is a test.\n");
+
+    ret = smbc_write(fd, buffer, strlen(buffer));
+    savedErrno = errno;
+    smbc_close(fd);
+
+    if (ret < 0)
+    {
+        errno = savedErrno;
+        perror("write");
+    }
+
+    if (smbc_stat(argv[1], &st) < 0)
+    {
+        perror("smbc_stat");
+        return 1;
+    }
+    
+    printf("Original size: %lu\n", (unsigned long) st.st_size);
+    
+    if ((fd = smbc_open(argv[1], O_WRONLY, 0)) < 0)
+    {
+        perror("smbc_open");
+        return 1;
+    }
+
+    ret = smbc_ftruncate(fd, 13);
+    savedErrno = errno;
+    smbc_close(fd);
+    if (ret < 0)
+    {
+        errno = savedErrno;
+        perror("smbc_ftruncate");
+        return 1;
+    }
+    
+    if (smbc_stat(argv[1], &st) < 0)
+    {
+        perror("smbc_stat");
+        return 1;
+    }
+    
+    printf("New size: %lu\n", (unsigned long) st.st_size);
+    
+    return 0; 
+}