*: use NULL for null pointers

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

19 files changed, 36 insertions, 36 deletions

diff --git a/e2fsprogs/old_e2fsprogs/blkid/devname.c b/e2fsprogs/old_e2fsprogs/blkid/devname.c
index 348e5d42e..fad92cb31 100644
--- a/e2fsprogs/old_e2fsprogs/blkid/devname.c
+++ b/e2fsprogs/old_e2fsprogs/blkid/devname.c
@@ -258,7 +258,7 @@ int blkid_probe_all(blkid_cache cache)
 {
         FILE *proc;
         char line[1024];
-        char ptname0[128], ptname1[128], *ptname = 0;
+        char ptname0[128], ptname1[128], *ptname = NULL;
         char *ptnames[2];
         dev_t devs[2];
         int ma, mi;
diff --git a/e2fsprogs/old_e2fsprogs/blkid/probe.c b/e2fsprogs/old_e2fsprogs/blkid/probe.c
index 1f7188e6d..77bfc737d 100644
--- a/e2fsprogs/old_e2fsprogs/blkid/probe.c
+++ b/e2fsprogs/old_e2fsprogs/blkid/probe.c
@@ -82,7 +82,7 @@ static void set_uuid(blkid_dev dev, uuid_t uuid)
 static void get_ext2_info(blkid_dev dev, unsigned char *buf)
 {
         struct ext2_super_block *es = (struct ext2_super_block *) buf;
-        const char *label = 0;
+        const char *label = NULL;
 
         DBG(DEBUG_PROBE, printf("ext2_sb.compat = %08X:%08X:%08X\n",
                    blkid_le32(es->s_feature_compat),
@@ -168,7 +168,7 @@ static int probe_vfat(int fd __BLKID_ATTR((unused)),
 {
         struct vfat_super_block *vs;
         char serno[10];
-        const char *label = 0;
+        const char *label = NULL;
         int label_len = 0;
 
         vs = (struct vfat_super_block *)buf;
@@ -201,7 +201,7 @@ static int probe_msdos(int fd __BLKID_ATTR((unused)),
 {
         struct msdos_super_block *ms = (struct msdos_super_block *) buf;
         char serno[10];
-        const char *label = 0;
+        const char *label = NULL;
         int label_len = 0;
 
         if (strncmp(ms->ms_label, "NO NAME", 7)) {
@@ -232,7 +232,7 @@ static int probe_xfs(int fd __BLKID_ATTR((unused)),
                      unsigned char *buf)
 {
         struct xfs_super_block *xs;
-        const char *label = 0;
+        const char *label = NULL;
 
         xs = (struct xfs_super_block *)buf;
 
@@ -250,7 +250,7 @@ static int probe_reiserfs(int fd __BLKID_ATTR((unused)),
 {
         struct reiserfs_super_block *rs = (struct reiserfs_super_block *) buf;
         unsigned int blocksize;
-        const char *label = 0;
+        const char *label = NULL;
 
         blocksize = blkid_le16(rs->rs_blocksize);
 
@@ -277,7 +277,7 @@ static int probe_jfs(int fd __BLKID_ATTR((unused)),
                      unsigned char *buf)
 {
         struct jfs_super_block *js;
-        const char *label = 0;
+        const char *label = NULL;
 
         js = (struct jfs_super_block *)buf;
 
@@ -295,7 +295,7 @@ static int probe_romfs(int fd __BLKID_ATTR((unused)),
                        unsigned char *buf)
 {
         struct romfs_super_block *ros;
-        const char *label = 0;
+        const char *label = NULL;
 
         ros = (struct romfs_super_block *)buf;
 
@@ -312,7 +312,7 @@ static int probe_cramfs(int fd __BLKID_ATTR((unused)),
                        unsigned char *buf)
 {
         struct cramfs_super_block *csb;
-        const char *label = 0;
+        const char *label = NULL;
 
         csb = (struct cramfs_super_block *)buf;
 
diff --git a/e2fsprogs/old_e2fsprogs/blkid/resolve.c b/e2fsprogs/old_e2fsprogs/blkid/resolve.c
index 0f92158e2..295ca61bf 100644
--- a/e2fsprogs/old_e2fsprogs/blkid/resolve.c
+++ b/e2fsprogs/old_e2fsprogs/blkid/resolve.c
@@ -65,7 +65,7 @@ char *blkid_get_devname(blkid_cache cache, const char *token,
 {
         blkid_dev dev;
         blkid_cache c = cache;
-        char *t = 0, *v = 0;
+        char *t = NULL, *v = NULL;
         char *ret = NULL;
 
         if (!token)
diff --git a/e2fsprogs/old_e2fsprogs/blkid/tag.c b/e2fsprogs/old_e2fsprogs/blkid/tag.c
index c0a93df98..8337b46b6 100644
--- a/e2fsprogs/old_e2fsprogs/blkid/tag.c
+++ b/e2fsprogs/old_e2fsprogs/blkid/tag.c
@@ -112,7 +112,7 @@ int blkid_set_tag(blkid_dev dev, const char *name,
                   const char *value, const int vlength)
 {
         blkid_tag       t = 0, head = 0;
-        char            *val = 0;
+        char            *val = NULL;
 
         if (!dev || !name)
                 return -BLKID_ERR_PARAM;
diff --git a/e2fsprogs/old_e2fsprogs/e2fsck.c b/e2fsprogs/old_e2fsprogs/e2fsck.c
index 7e0996956..7384bc453 100644
--- a/e2fsprogs/old_e2fsprogs/e2fsck.c
+++ b/e2fsprogs/old_e2fsprogs/e2fsck.c
@@ -1539,7 +1539,7 @@ static errcode_t e2fsck_get_journal(e2fsck_t ctx, journal_t **ret_journal)
         struct buffer_head      *bh;
         struct inode            *j_inode = NULL;
         struct kdev_s           *dev_fs = NULL, *dev_journal;
-        const char              *journal_name = 0;
+        const char              *journal_name = NULL;
         journal_t               *journal = NULL;
         errcode_t               retval = 0;
         io_manager              io_ptr = 0;
@@ -6009,7 +6009,7 @@ static int check_dir_block(ext2_filsys fs,
         struct dir_info         *subdir, *dir;
         struct dx_dir_info      *dx_dir;
 #ifdef ENABLE_HTREE
-        struct dx_dirblock_info *dx_db = 0;
+        struct dx_dirblock_info *dx_db = NULL;
 #endif /* ENABLE_HTREE */
         struct ext2_dir_entry   *dirent, *prev;
         ext2_dirhash_t          hash;
@@ -7524,7 +7524,7 @@ static void e2fsck_pass4(e2fsck_t ctx)
         struct ext2_inode       inode;
         struct problem_context  pctx;
         __u16   link_count, link_counted;
-        char    *buf = 0;
+        char    *buf = NULL;
         int     group, maxgroup;
 
         /* Pass 4 */
@@ -9670,7 +9670,7 @@ int fix_problem(e2fsck_t ctx, problem_t code, struct problem_context *pctx)
 {
         ext2_filsys fs = ctx->fs;
         const struct e2fsck_problem *ptr;
-        struct latch_descr *ldesc = 0;
+        struct latch_descr *ldesc = NULL;
         const char *message;
         int             def_yn, answer, ans;
         int             print_answer = 0;
@@ -10669,7 +10669,7 @@ static errcode_t calculate_tree(ext2_filsys fs,
                                 ext2_ino_t parent)
 {
         struct ext2_dx_root_info        *root_info;
-        struct ext2_dx_entry            *root, *dx_ent = 0;
+        struct ext2_dx_entry            *root, *dx_ent = NULL;
         struct ext2_dx_countlimit       *root_limit, *limit;
         errcode_t                       retval;
         char                            * block_start;
@@ -10821,7 +10821,7 @@ static errcode_t e2fsck_rehash_dir(e2fsck_t ctx, ext2_ino_t ino)
         ext2_filsys             fs = ctx->fs;
         errcode_t               retval;
         struct ext2_inode       inode;
-        char                    *dir_buf = 0;
+        char                    *dir_buf = NULL;
         struct fill_dir_struct  fd;
         struct out_dir          outdir;
 
@@ -11559,7 +11559,7 @@ static void check_resize_inode(e2fsck_t ctx)
         struct problem_context  pctx;
         int             i, j, gdt_off, ind_off;
         blk_t           blk, pblk, expect;
-        __u32           *dind_buf = 0, *ind_buf;
+        __u32           *dind_buf = NULL, *ind_buf;
         errcode_t       retval;
 
         clear_problem_context(&pctx);
@@ -12975,7 +12975,7 @@ static errcode_t PRS(int argc, char **argv, e2fsck_t *ret_ctx)
         e2fsck_t        ctx;
         errcode_t       retval;
         struct sigaction        sa;
-        char            *extended_opts = 0;
+        char            *extended_opts = NULL;
 
         retval = e2fsck_allocate_context(&ctx);
         if (retval)
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/alloc.c b/e2fsprogs/old_e2fsprogs/ext2fs/alloc.c
index 590f23a7e..5021d72c9 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/alloc.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/alloc.c
@@ -109,7 +109,7 @@ errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
 {
         errcode_t       retval;
         blk_t           block;
-        char            *buf = 0;
+        char            *buf = NULL;
 
         if (!block_buf) {
                 retval = ext2fs_get_mem(fs->blocksize, &buf);
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/bmap.c b/e2fsprogs/old_e2fsprogs/ext2fs/bmap.c
index b22fe3dbf..b2d0279d8 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/bmap.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/bmap.c
@@ -136,7 +136,7 @@ errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, struct ext2_inode *inode,
         struct ext2_inode inode_buf;
         blk_t addr_per_block;
         blk_t   b;
-        char    *buf = 0;
+        char    *buf = NULL;
         errcode_t       retval = 0;
         int             blocks_alloc = 0, inode_dirty = 0;
 
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/closefs.c b/e2fsprogs/old_e2fsprogs/ext2fs/closefs.c
index 008d5f36e..7ba7f22e2 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/closefs.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/closefs.c
@@ -206,8 +206,8 @@ errcode_t ext2fs_flush(ext2_filsys fs)
         blk_t           group_block;
         errcode_t       retval;
         unsigned long   fs_state;
-        struct ext2_super_block *super_shadow = 0;
-        struct ext2_group_desc *group_shadow = 0;
+        struct ext2_super_block *super_shadow = NULL;
+        struct ext2_group_desc *group_shadow = NULL;
         char    *group_ptr;
         int     old_desc_blocks;
 #if BB_BIG_ENDIAN
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/dirblock.c b/e2fsprogs/old_e2fsprogs/ext2fs/dirblock.c
index 5d3f6a1bc..f651338e3 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/dirblock.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/dirblock.c
@@ -80,7 +80,7 @@ errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
         int             do_swap = 0;
         errcode_t       retval;
         char            *p, *end;
-        char            *buf = 0;
+        char            *buf = NULL;
         struct ext2_dir_entry *dirent;
 
         if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/ext_attr.c b/e2fsprogs/old_e2fsprogs/ext2fs/ext_attr.c
index 7ee41f234..a2ba12d45 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/ext_attr.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/ext_attr.c
@@ -68,7 +68,7 @@ errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk,
 {
         errcode_t       retval;
         struct ext2_ext_attr_header *header;
-        char    *buf = 0;
+        char    *buf = NULL;
 
         if ((blk >= fs->super->s_blocks_count) ||
             (blk < fs->super->s_first_data_block))
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/finddev.c b/e2fsprogs/old_e2fsprogs/ext2fs/finddev.c
index 5e2cce940..e9e83fd7a 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/finddev.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/finddev.c
@@ -115,9 +115,9 @@ success:
  */
 char *ext2fs_find_block_device(dev_t device)
 {
-        struct dir_list *list = 0, *new_list = 0;
+        struct dir_list *list = NULL, *new_list = NULL;
         struct dir_list *current;
-        char    *ret_path = 0;
+        char    *ret_path = NULL;
 
         /*
          * Add the starting directories to search...
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/imager.c b/e2fsprogs/old_e2fsprogs/ext2fs/imager.c
index e82321efa..0f9cfcfaf 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/imager.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/imager.c
@@ -333,7 +333,7 @@ errout:
  */
 errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags)
 {
-        char            *ptr, *buf = 0;
+        char            *ptr, *buf = NULL;
         int             size;
         ssize_t         actual;
         errcode_t       retval;
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/mkdir.c b/e2fsprogs/old_e2fsprogs/ext2fs/mkdir.c
index b63c5d7a6..93f47b06f 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/mkdir.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/mkdir.c
@@ -39,7 +39,7 @@ errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
         ext2_ino_t              ino = inum;
         ext2_ino_t              scratch_ino;
         blk_t                   blk;
-        char                    *block = 0;
+        char                    *block = NULL;
 
         EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
 
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/mkjournal.c b/e2fsprogs/old_e2fsprogs/ext2fs/mkjournal.c
index af47aee18..db1c8bff3 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/mkjournal.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/mkjournal.c
@@ -95,7 +95,7 @@ static errcode_t write_journal_file(ext2_filsys fs, char *filename,
                                     blk_t size, int flags)
 {
         errcode_t       retval;
-        char            *buf = 0;
+        char            *buf = NULL;
         int             fd, ret_size;
         blk_t           i;
 
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/namei.c b/e2fsprogs/old_e2fsprogs/ext2fs/namei.c
index 4d4e3788c..14d48fb72 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/namei.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/namei.c
@@ -30,7 +30,7 @@ static errcode_t follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t dir,
                              char *buf, ext2_ino_t *res_inode)
 {
         char *pathname;
-        char *buffer = 0;
+        char *buffer = NULL;
         errcode_t retval;
         struct ext2_inode ei;
 
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/rw_bitmaps.c b/e2fsprogs/old_e2fsprogs/ext2fs/rw_bitmaps.c
index a5782db95..0ae0a8234 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/rw_bitmaps.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/rw_bitmaps.c
@@ -149,7 +149,7 @@ errcode_t ext2fs_write_block_bitmap (ext2_filsys fs)
 static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
 {
         dgrp_t i;
-        char *block_bitmap = 0, *inode_bitmap = 0;
+        char *block_bitmap = NULL, *inode_bitmap = NULL;
         char *buf;
         errcode_t retval;
         int block_nbytes = (int) EXT2_BLOCKS_PER_GROUP(fs->super) / 8;
diff --git a/e2fsprogs/old_e2fsprogs/fsck.c b/e2fsprogs/old_e2fsprogs/fsck.c
index c0964f79d..dc029b65a 100644
--- a/e2fsprogs/old_e2fsprogs/fsck.c
+++ b/e2fsprogs/old_e2fsprogs/fsck.c
@@ -1166,7 +1166,7 @@ static void signal_cancel(int sig FSCK_ATTR((unused)))
 static void PRS(int argc, char **argv)
 {
         int     i, j;
-        char    *arg, *dev, *tmp = 0;
+        char    *arg, *dev, *tmp = NULL;
         char    options[128];
         int     opt = 0;
         int     opts_for_fsck = 0;
diff --git a/e2fsprogs/old_e2fsprogs/mke2fs.c b/e2fsprogs/old_e2fsprogs/mke2fs.c
index 32f0329c3..520364550 100644
--- a/e2fsprogs/old_e2fsprogs/mke2fs.c
+++ b/e2fsprogs/old_e2fsprogs/mke2fs.c
@@ -799,8 +799,8 @@ static int PRS(int argc, char **argv)
         int             show_version_only = 0;
         ext2_ino_t      num_inodes = 0;
         errcode_t       retval;
-        char *          extended_opts = 0;
-        const char *    fs_type = 0;
+        char *          extended_opts = NULL;
+        const char *    fs_type = NULL;
         blk_t           dev_size;
         long            sysval;
 
diff --git a/shell/ash.c b/shell/ash.c
index 03904bbf8..8ffe67cca 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -2482,7 +2482,7 @@ static void hashcd(void);
 static int
 docd(const char *dest, int flags)
 {
-        const char *dir = 0;
+        const char *dir = NULL;
         int err;
 
         TRACE(("docd(\"%s\", %d) called\n", dest, flags));