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Change `(foo *)0'' to `NULL'' where it's possible

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(and it appears possible throughout ftpd(8) source.)

It is not a mere issue of style: Null pointers in C
seem to have been mistaken one way or another quite often.
This commit is contained in:
Yaroslav Tykhiy 2004-07-31 15:03:17 +00:00
parent 0e519c96ef
commit aa5a9d3fff
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=132931
2 changed files with 11 additions and 11 deletions
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20
libexec/ftpd/ftpcmd.y
View file

@ -106,7 +106,7 @@ static int cmd_form;
static int cmd_bytesz; static int cmd_bytesz;
static int state; static int state;
char cbuf[512]; char cbuf[512];
char *fromname = (char *) 0; char *fromname = NULL;
extern int epsvall; extern int epsvall;
@ -159,7 +159,7 @@ cmd_list
{ {
if (fromname) if (fromname)
free(fromname); free(fromname);
fromname = (char *) 0; fromname = NULL;
restart_point = 0; restart_point = 0;
} }
| cmd_list rcmd | cmd_list rcmd
@ -455,7 +455,7 @@ cmd
if (noretr || (guest && noguestretr)) if (noretr || (guest && noguestretr))
reply(500, "RETR command is disabled"); reply(500, "RETR command is disabled");
else if ($2 && $4 != NULL) else if ($2 && $4 != NULL)
retrieve((char *) 0, $4); retrieve(NULL, $4);
if ($4 != NULL) if ($4 != NULL)
free($4); free($4);
@ -522,7 +522,7 @@ cmd
if (fromname) { if (fromname) {
renamecmd(fromname, $4); renamecmd(fromname, $4);
free(fromname); free(fromname);
fromname = (char *) 0; fromname = NULL;
} else { } else {
reply(503, "Bad sequence of commands."); reply(503, "Bad sequence of commands.");
} }
@ -550,7 +550,7 @@ cmd
} }
| HELP CRLF | HELP CRLF
{ {
help(cmdtab, (char *) 0); help(cmdtab, NULL);
} }
| HELP SP STRING CRLF | HELP SP STRING CRLF
{ {
@ -563,7 +563,7 @@ cmd
if (*cp) if (*cp)
help(sitetab, cp); help(sitetab, cp);
else else
help(sitetab, (char *) 0); help(sitetab, NULL);
} else } else
help(cmdtab, $3); help(cmdtab, $3);
free($3); free($3);
@ -598,7 +598,7 @@ cmd
} }
| SITE SP HELP CRLF | SITE SP HELP CRLF
{ {
help(sitetab, (char *) 0); help(sitetab, NULL);
} }
| SITE SP HELP SP STRING CRLF | SITE SP HELP SP STRING CRLF
{ {
@ -771,7 +771,7 @@ rcmd
if ($2 && $4) { if ($2 && $4) {
if (fromname) if (fromname)
free(fromname); free(fromname);
fromname = (char *) 0; fromname = NULL;
if (renamefrom($4)) if (renamefrom($4))
fromname = $4; fromname = $4;
else else
@ -785,7 +785,7 @@ rcmd
if ($2) { if ($2) {
if (fromname) if (fromname)
free(fromname); free(fromname);
fromname = (char *) 0; fromname = NULL;
restart_point = $4.o; restart_point = $4.o;
reply(350, "Restarting at %jd. %s", reply(350, "Restarting at %jd. %s",
(intmax_t)restart_point, (intmax_t)restart_point,
@ -1556,7 +1556,7 @@ help(struct tab *ctab, char *s)
} }
upper(s); upper(s);
c = lookup(ctab, s); c = lookup(ctab, s);
if (c == (struct tab *)0) { if (c == NULL) {
reply(502, "Unknown command %s.", s); reply(502, "Unknown command %s.", s);
return; return;
} }

2
libexec/ftpd/ftpd.c
View file

@ -1910,7 +1910,7 @@ dataconn(char *name, off_t size, char *mode)
if ((flags = fcntl(pdata, F_GETFL, 0)) == -1 || if ((flags = fcntl(pdata, F_GETFL, 0)) == -1 ||
fcntl(pdata, F_SETFL, flags | O_NONBLOCK) == -1) fcntl(pdata, F_SETFL, flags | O_NONBLOCK) == -1)
goto pdata_err; goto pdata_err;
if (select(pdata+1, &set, (fd_set *) 0, (fd_set *) 0, &timeout) <= 0 || if (select(pdata+1, &set, NULL, NULL, &timeout) <= 0 ||
(s = accept(pdata, (struct sockaddr *) &from, &fromlen)) < 0) (s = accept(pdata, (struct sockaddr *) &from, &fromlen)) < 0)
goto pdata_err; goto pdata_err;
(void) close(pdata); (void) close(pdata);