From 53a8bad95d461e92f3791dabadfb7f95c9ddd3c1 Mon Sep 17 00:00:00 2001
From: Eric Bollengier <eric@eb.homelinux.org>
Date: Sun, 11 May 2008 09:53:00 +0000
Subject: [PATCH] ebl  Add O_NONBLOCK option and ERNOMEDIUM

git-svn-id: https://bacula.svn.sourceforge.net/svnroot/bacula/trunk@6939 91ce42f0-d328-0410-95d8-f526ca767f89
---
 bacula/patches/testing/faketape.c | 31 +++++++++++++++++++++++++------
 bacula/patches/testing/faketape.h | 26 +++++++++++++-------------
 2 files changed, 38 insertions(+), 19 deletions(-)

diff --git a/bacula/patches/testing/faketape.c b/bacula/patches/testing/faketape.c
index 9284680b66..80acad6116 100644
--- a/bacula/patches/testing/faketape.c
+++ b/bacula/patches/testing/faketape.c
@@ -168,6 +168,11 @@ int faketape_ioctl(int fd, unsigned long int request, ...)
 int faketape::tape_op(struct mtop *mt_com)
 {
    int result=0;
+
+   if (!online) {
+      errno = ENOMEDIUM;
+      return -1;
+   }
    
    switch (mt_com->mt_op)
    {
@@ -424,6 +429,7 @@ int faketape::get_fd()
  */
 int faketape::write(const void *buffer, unsigned int count)
 {
+   ASSERT(online);
    ASSERT(current_file >= 0);
    ASSERT(count > 0);
    ASSERT(buffer);
@@ -481,6 +487,7 @@ int faketape::write(const void *buffer, unsigned int count)
 
 int faketape::weof(int count)
 {
+   ASSERT(online);
    ASSERT(current_file >= 0);
    Dmsg3(dbglevel, "Writing EOF %i:%i last=%i\n", 
 	 current_file, current_block,last_file);
@@ -510,6 +517,7 @@ int faketape::weof(int count)
 
 int faketape::fsf(int count)
 {   
+   ASSERT(online);
    ASSERT(current_file >= 0);
    ASSERT(fd >= 0);
 /*
@@ -543,6 +551,7 @@ int faketape::fsf(int count)
 
 int faketape::fsr(int count)
 {
+   ASSERT(online);
    ASSERT(current_file >= 0);
    ASSERT(fd >= 0);
    
@@ -599,6 +608,7 @@ int faketape::bsr(int count)
    Dmsg2(dbglevel, "bsr current_block=%i count=%i\n", 
 	 current_block, count);
 
+   ASSERT(online);
    ASSERT(current_file >= 0);
    ASSERT(count == 1);
    ASSERT(fd >= 0);
@@ -661,6 +671,7 @@ int faketape::bsr(int count)
 
 int faketape::bsf(int count)
 {
+   ASSERT(online);
    ASSERT(current_file >= 0);
    Dmsg3(dbglevel, "bsf %i:%i count=%i\n", current_file, current_block, count);
    int ret = 0;
@@ -696,6 +707,7 @@ int faketape::offline()
    atEOT = false;		/* End of tape */
    atEOD = false;		/* End of data */
    atBOT = false;		/* Begin of tape */
+   online = false;
 
    current_file = -1;
    current_block = -1;
@@ -724,6 +736,7 @@ int faketape::close()
 
 int faketape::read(void *buffer, unsigned int count)
 {
+   ASSERT(online);
    ASSERT(current_file >= 0);
    unsigned int nb;
    uint32_t s;
@@ -780,26 +793,31 @@ int faketape::open(const char *pathname, int uflags)
 {
    Dmsg2(dbglevel, "faketape::open(%s, %i)\n", pathname, uflags);
 
+   online = true;		/* assume that drive contains a tape */
+
    struct stat statp;   
    if (stat(pathname, &statp) != 0) {
       Dmsg1(dbglevel, "Can't stat on %s\n", pathname);
-      return -1;
+      if (uflags & O_NONBLOCK) {
+	 online = false;
+	 fd = ::open("/dev/null", O_CREAT | O_RDWR | O_LARGEFILE, 0600);
+      }
+   } else {
+      fd = ::open(pathname, O_CREAT | O_RDWR | O_LARGEFILE, 0600);
    }
 
-   fd = ::open(pathname, O_CREAT | O_RDWR | O_LARGEFILE, 0700);
    if (fd < 0) {
+      errno = ENOMEDIUM;
       return -1;
    }
 
    /* open volume descriptor and get this->fd */
-   if (find_maxfile() < 0) {
-      return -1;
-   }
+   find_maxfile();
 
    current_block = 0;
    current_file = 0;
    needEOF = false;
-   online = inplace = true;
+   inplace = true;
    atBOT = true;
    atEOT = atEOD = false;
 
@@ -827,6 +845,7 @@ int faketape::find_maxfile()
 
 int faketape::seek_file()
 {
+   ASSERT(online);
    ASSERT(current_file >= 0);
    Dmsg2(dbglevel, "seek_file %i:%i\n", current_file, current_block);
 
diff --git a/bacula/patches/testing/faketape.h b/bacula/patches/testing/faketape.h
index 3aea2228ba..58411ce9bb 100644
--- a/bacula/patches/testing/faketape.h
+++ b/bacula/patches/testing/faketape.h
@@ -52,23 +52,23 @@ void faketape_debug(int level);
 
 class faketape {
 private:
-   int         fd;		/* Our file descriptor */
+   int         fd;              /* Our file descriptor */
 
-   off_t       file_size;	/* size */
+   off_t       file_size;       /* size */
    off_t       max_block;
 
-   bool        atEOF;		/* End of file */
-   bool        atEOT;		/* End of media */
-   bool        atEOD;		/* End of data */
+   bool        atEOF;           /* End of file */
+   bool        atEOT;           /* End of media */
+   bool        atEOD;           /* End of data */
    bool        atBOT;           /* Begin of tape */
-   bool        online;		/* volume online */
-   bool        inplace;		/* have to seek before writing ? */
-   bool        needEOF;		/* check if last operation need eof */
-
-   int32_t     last_file;	/* last file of the volume */
-   int32_t     current_file;	/* max 65000 files */
-   int32_t     current_block;	/* max 4G blocks of 1KB */
-   off_t       current_pos;	/* current position in stream */
+   bool        online;          /* volume online */
+   bool        inplace;         /* have to seek before writing ? */
+   bool        needEOF;         /* check if last operation need eof */
+
+   int32_t     last_file;       /* last file of the volume */
+   int32_t     current_file;    /* max 65000 files */
+   int32_t     current_block;   /* max 4G blocks of 1KB */
+   off_t       current_pos;     /* current position in stream */
 
    void destroy();
    int find_maxfile();
-- 
2.39.5