1 files changed, 146 insertions, 0 deletions
diff --git a/nsprpub/pr/tests/append.c b/nsprpub/pr/tests/append.c
new file mode 100644
index 0000000000..64fe3ff2c1
--- /dev/null
+++ b/nsprpub/pr/tests/append.c
@@ -0,0 +1,146 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+** File:        append.c
+** Description: Testing File writes where PR_APPEND was used on open
+**
+** append attempts to verify that a file opened with PR_APPEND
+** will always append to the end of file, regardless where the
+** current file pointer is positioned. To do this, PR_Seek() is
+** called before each write with the position set to beginning of
+** file. Subsequent writes should always append.
+** The file is read back, summing the integer data written to the
+** file. If the expected result is equal, the test passes.
+**
+** See BugSplat: 4090
+*/
+#include "plgetopt.h"
+#include "nspr.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+PRIntn  debug = 0;
+PRIntn  verbose = 0;
+PRBool  failedAlready = PR_FALSE;
+const PRInt32 addedBytes = 1000;
+const PRInt32   buf = 1; /* constant written to fd, addedBytes times */
+PRInt32         inBuf;   /* read it back into here */
+
+int main(int argc, char **argv)
+{
+    PRStatus    rc;
+    PRInt32     rv;
+    PRFileDesc  *fd;
+    PRIntn      i;
+    PRInt32     sum = 0;
+
+    {   /* Get command line options */
+        PLOptStatus os;
+        PLOptState *opt = PL_CreateOptState(argc, argv, "vd");
+
+        while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
+        {
+            if (PL_OPT_BAD == os) {
+                continue;
+            }
+            switch (opt->option)
+            {
+                case 'd':  /* debug */
+                    debug = 1;
+                    break;
+                case 'v':  /* verbose */
+                    verbose = 1;
+                    break;
+                default:
+                    break;
+            }
+        }
+        PL_DestroyOptState(opt);
+    } /* end block "Get command line options" */
+    /* ---------------------------------------------------------------------- */
+    fd = PR_Open( "./tmp-nsprAppend", (PR_APPEND | PR_CREATE_FILE | PR_TRUNCATE | PR_WRONLY), 0666 );
+    if ( NULL == fd )  {
+        if (debug) {
+            printf("PR_Open() failed for writing: %d\n", PR_GetError());
+        }
+        failedAlready = PR_TRUE;
+        goto Finished;
+    }
+
+    for ( i = 0; i < addedBytes ; i++ ) {
+        rv = PR_Write( fd, &buf, sizeof(buf));
+        if ( sizeof(buf) != rv )  {
+            if (debug) {
+                printf("PR_Write() failed: %d\n", PR_GetError());
+            }
+            failedAlready = PR_TRUE;
+            goto Finished;
+        }
+        rv = PR_Seek( fd, 0, PR_SEEK_SET );
+        if ( -1 == rv )  {
+            if (debug) {
+                printf("PR_Seek() failed: %d\n", PR_GetError());
+            }
+            failedAlready = PR_TRUE;
+            goto Finished;
+        }
+    }
+    rc = PR_Close( fd );
+    if ( PR_FAILURE == rc ) {
+        if (debug) {
+            printf("PR_Close() failed after writing: %d\n", PR_GetError());
+        }
+        failedAlready = PR_TRUE;
+        goto Finished;
+    }
+    /* ---------------------------------------------------------------------- */
+    fd = PR_Open( "./tmp-nsprAppend", PR_RDONLY, 0 );
+    if ( NULL == fd )  {
+        if (debug) {
+            printf("PR_Open() failed for reading: %d\n", PR_GetError());
+        }
+        failedAlready = PR_TRUE;
+        goto Finished;
+    }
+
+    for ( i = 0; i < addedBytes ; i++ ) {
+        rv = PR_Read( fd, &inBuf, sizeof(inBuf));
+        if ( sizeof(inBuf) != rv)  {
+            if (debug) {
+                printf("PR_Write() failed: %d\n", PR_GetError());
+            }
+            failedAlready = PR_TRUE;
+            goto Finished;
+        }
+        sum += inBuf;
+    }
+
+    rc = PR_Close( fd );
+    if ( PR_FAILURE == rc ) {
+        if (debug) {
+            printf("PR_Close() failed after reading: %d\n", PR_GetError());
+        }
+        failedAlready = PR_TRUE;
+        goto Finished;
+    }
+    if ( sum != addedBytes )  {
+        if (debug) {
+            printf("Uh Oh! addedBytes: %d. Sum: %d\n", addedBytes, sum);
+        }
+        failedAlready = PR_TRUE;
+        goto Finished;
+    }
+
+    /* ---------------------------------------------------------------------- */
+Finished:
+    if (debug || verbose) {
+        printf("%s\n", (failedAlready)? "FAILED" : "PASSED" );
+    }
+    return( (failedAlready)? 1 : 0 );
+}  /* main() */
+
+/* append.c */