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-rw-r--r--contrib/miscutil/misc_utils.c4
-rw-r--r--src/backend/libpq/be-fsstubs.c26
-rw-r--r--src/backend/libpq/be-pqexec.c6
-rw-r--r--src/backend/port/dynloader/aix.c3
-rw-r--r--src/backend/utils/adt/like.c5
-rw-r--r--src/backend/utils/adt/not_in.c12
-rw-r--r--src/backend/utils/adt/regexp.c5
-rw-r--r--src/backend/utils/adt/varchar.c18
-rw-r--r--src/include/c.h20
9 files changed, 56 insertions, 43 deletions
diff --git a/contrib/miscutil/misc_utils.c b/contrib/miscutil/misc_utils.c
index f5a98683280..e7949d32aa6 100644
--- a/contrib/miscutil/misc_utils.c
+++ b/contrib/miscutil/misc_utils.c
@@ -99,9 +99,9 @@ active_listeners(text *relname)
if (relname && (VARSIZE(relname) > VARHDRSZ))
{
+ MemSet(listen_name, 0, NAMEDATALEN);
len = MIN(VARSIZE(relname) - VARHDRSZ, NAMEDATALEN - 1);
- strncpy(listen_name, VARDATA(relname), len);
- listen_name[len] = '\0';
+ memcpy(listen_name, VARDATA(relname), len);
ScanKeyEntryInitialize(&key, 0,
Anum_pg_listener_relname,
F_NAMEEQ,
diff --git a/src/backend/libpq/be-fsstubs.c b/src/backend/libpq/be-fsstubs.c
index 91769120f95..929ddad5aa8 100644
--- a/src/backend/libpq/be-fsstubs.c
+++ b/src/backend/libpq/be-fsstubs.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/libpq/be-fsstubs.c,v 1.48 2000/07/03 23:09:37 wieck Exp $
+ * $Header: /cvsroot/pgsql/src/backend/libpq/be-fsstubs.c,v 1.49 2000/07/07 21:12:53 tgl Exp $
*
* NOTES
* This should be moved to a more appropriate place. It is here
@@ -379,26 +379,23 @@ lo_import(PG_FUNCTION_ARGS)
/*
* open the file to be read in
*/
- nbytes = VARSIZE(filename) - VARHDRSZ + 1;
- if (nbytes > FNAME_BUFSIZE)
- nbytes = FNAME_BUFSIZE;
- StrNCpy(fnamebuf, VARDATA(filename), nbytes);
+ nbytes = VARSIZE(filename) - VARHDRSZ;
+ if (nbytes >= FNAME_BUFSIZE)
+ nbytes = FNAME_BUFSIZE-1;
+ memcpy(fnamebuf, VARDATA(filename), nbytes);
+ fnamebuf[nbytes] = '\0';
fd = PathNameOpenFile(fnamebuf, O_RDONLY | PG_BINARY, 0666);
if (fd < 0)
- { /* error */
elog(ERROR, "lo_import: can't open unix file \"%s\": %m",
fnamebuf);
- }
/*
* create an inversion "object"
*/
lobj = inv_create(INV_READ | INV_WRITE);
if (lobj == NULL)
- {
elog(ERROR, "lo_import: can't create inv object for \"%s\"",
fnamebuf);
- }
/*
* the oid for the large object is just the oid of the relation
@@ -461,18 +458,17 @@ lo_export(PG_FUNCTION_ARGS)
* 022. This code used to drop it all the way to 0, but creating
* world-writable export files doesn't seem wise.
*/
- nbytes = VARSIZE(filename) - VARHDRSZ + 1;
- if (nbytes > FNAME_BUFSIZE)
- nbytes = FNAME_BUFSIZE;
- StrNCpy(fnamebuf, VARDATA(filename), nbytes);
+ nbytes = VARSIZE(filename) - VARHDRSZ;
+ if (nbytes >= FNAME_BUFSIZE)
+ nbytes = FNAME_BUFSIZE-1;
+ memcpy(fnamebuf, VARDATA(filename), nbytes);
+ fnamebuf[nbytes] = '\0';
oumask = umask((mode_t) 0022);
fd = PathNameOpenFile(fnamebuf, O_CREAT | O_WRONLY | O_TRUNC | PG_BINARY, 0666);
umask(oumask);
if (fd < 0)
- { /* error */
elog(ERROR, "lo_export: can't open unix file \"%s\": %m",
fnamebuf);
- }
/*
* read in from the Unix file and write to the inversion file
diff --git a/src/backend/libpq/be-pqexec.c b/src/backend/libpq/be-pqexec.c
index 78745d50a7f..474da587792 100644
--- a/src/backend/libpq/be-pqexec.c
+++ b/src/backend/libpq/be-pqexec.c
@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/libpq/Attic/be-pqexec.c,v 1.35 2000/07/05 23:11:19 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/libpq/Attic/be-pqexec.c,v 1.36 2000/07/07 21:12:53 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -236,8 +236,8 @@ strmake(char *str, int len)
if (len <= 0)
len = strlen(str);
- newstr = (char *) palloc((unsigned) len + 1);
- StrNCpy(newstr, str, len + 1);
+ newstr = (char *) palloc(len + 1);
+ memcpy(newstr, str, len);
newstr[len] = (char) 0;
return newstr;
}
diff --git a/src/backend/port/dynloader/aix.c b/src/backend/port/dynloader/aix.c
index 61705551430..c6295406e22 100644
--- a/src/backend/port/dynloader/aix.c
+++ b/src/backend/port/dynloader/aix.c
@@ -536,7 +536,8 @@ readExports(ModulePtr mp)
* first SYMNMLEN chars and make sure we have a zero byte at
* the end.
*/
- StrNCpy(tmpsym, ls->l_name, SYMNMLEN + 1);
+ strncpy(tmpsym, ls->l_name, SYMNMLEN);
+ tmpsym[SYMNMLEN] = '\0';
symname = tmpsym;
}
ep->name = strdup(symname);
diff --git a/src/backend/utils/adt/like.c b/src/backend/utils/adt/like.c
index 6fbd95ffe25..5a7b8473392 100644
--- a/src/backend/utils/adt/like.c
+++ b/src/backend/utils/adt/like.c
@@ -11,7 +11,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/like.c,v 1.36 2000/07/06 05:48:11 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/like.c,v 1.37 2000/07/07 21:12:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -48,7 +48,8 @@ fixedlen_like(char *s, text *p, int charlen)
(void) pg_mb2wchar_with_len((unsigned char *) s, sterm, charlen);
#else
sterm = (char *) palloc(charlen + 1);
- StrNCpy(sterm, s, charlen + 1);
+ memcpy(sterm, s, charlen);
+ sterm[charlen] = '\0';
#endif
/*
diff --git a/src/backend/utils/adt/not_in.c b/src/backend/utils/adt/not_in.c
index ec3b82c502a..55182f1bf94 100644
--- a/src/backend/utils/adt/not_in.c
+++ b/src/backend/utils/adt/not_in.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/not_in.c,v 1.23 2000/06/09 01:11:09 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/not_in.c,v 1.24 2000/07/07 21:12:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -52,10 +52,12 @@ int4notin(PG_FUNCTION_ARGS)
char my_copy[NAMEDATALEN * 2 + 2];
Datum value;
- strlength = VARSIZE(relation_and_attr) - VARHDRSZ + 1;
- if (strlength > sizeof(my_copy))
- strlength = sizeof(my_copy);
- StrNCpy(my_copy, VARDATA(relation_and_attr), strlength);
+ /* make a null-terminated copy of text */
+ strlength = VARSIZE(relation_and_attr) - VARHDRSZ;
+ if (strlength >= sizeof(my_copy))
+ strlength = sizeof(my_copy)-1;
+ memcpy(my_copy, VARDATA(relation_and_attr), strlength);
+ my_copy[strlength] = '\0';
relation = (char *) strtok(my_copy, ".");
attribute = (char *) strtok(NULL, ".");
diff --git a/src/backend/utils/adt/regexp.c b/src/backend/utils/adt/regexp.c
index dcf158c7a28..5e9a91dbf48 100644
--- a/src/backend/utils/adt/regexp.c
+++ b/src/backend/utils/adt/regexp.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/regexp.c,v 1.32 2000/07/06 05:48:11 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/regexp.c,v 1.33 2000/07/07 21:12:50 tgl Exp $
*
* Alistair Crooks added the code for the regex caching
* agc - cached the regular expressions used - there's a good chance
@@ -164,7 +164,8 @@ fixedlen_regexeq(char *s, text *p, int charlen, int cflags)
/* be sure sterm is null-terminated */
sterm = (char *) palloc(charlen + 1);
- StrNCpy(sterm, s, charlen + 1);
+ memcpy(sterm, s, charlen);
+ sterm[charlen] = '\0';
result = RE_compile_and_execute(p, sterm, cflags);
diff --git a/src/backend/utils/adt/varchar.c b/src/backend/utils/adt/varchar.c
index 6f17cb589ae..58b24f339e1 100644
--- a/src/backend/utils/adt/varchar.c
+++ b/src/backend/utils/adt/varchar.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/varchar.c,v 1.67 2000/07/03 23:09:53 wieck Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/varchar.c,v 1.68 2000/07/07 21:12:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -115,9 +115,11 @@ bpcharout(PG_FUNCTION_ARGS)
char *result;
int len;
+ /* copy and add null term */
len = VARSIZE(s) - VARHDRSZ;
result = (char *) palloc(len + 1);
- StrNCpy(result, VARDATA(s), len + 1); /* copy and add null term */
+ memcpy(result, VARDATA(s), len);
+ result[len] = '\0';
#ifdef CYR_RECODE
convertstr(result, len, 1);
@@ -268,8 +270,8 @@ bpchar_name(char *s)
return NULL;
len = VARSIZE(s) - VARHDRSZ;
- if (len > NAMEDATALEN)
- len = NAMEDATALEN;
+ if (len >= NAMEDATALEN)
+ len = NAMEDATALEN-1;
while (len > 0)
{
@@ -284,7 +286,7 @@ bpchar_name(char *s)
#endif
result = (NameData *) palloc(NAMEDATALEN);
- StrNCpy(NameStr(*result), VARDATA(s), NAMEDATALEN);
+ memcpy(NameStr(*result), VARDATA(s), len);
/* now null pad to full length... */
while (len < NAMEDATALEN)
@@ -316,7 +318,7 @@ name_bpchar(NameData *s)
#endif
result = (char *) palloc(VARHDRSZ + len);
- strncpy(VARDATA(result), NameStr(*s), len);
+ memcpy(VARDATA(result), NameStr(*s), len);
VARATT_SIZEP(result) = len + VARHDRSZ;
return result;
@@ -365,9 +367,11 @@ varcharout(PG_FUNCTION_ARGS)
char *result;
int len;
+ /* copy and add null term */
len = VARSIZE(s) - VARHDRSZ;
result = (char *) palloc(len + 1);
- StrNCpy(result, VARDATA(s), len + 1); /* copy and add null term */
+ memcpy(result, VARDATA(s), len);
+ result[len] = '\0';
#ifdef CYR_RECODE
convertstr(result, len, 1);
diff --git a/src/include/c.h b/src/include/c.h
index 65ff45aa923..250a8c6db16 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Id: c.h,v 1.75 2000/07/06 21:33:44 petere Exp $
+ * $Id: c.h,v 1.76 2000/07/07 21:12:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -781,11 +781,19 @@ extern int assertTest(int val);
/*
* StrNCpy
- * Like standard library function strncpy(), except that result string
- * is guaranteed to be null-terminated --- that is, at most N-1 bytes
- * of the source string will be kept.
- * Also, the macro returns no result (too hard to do that without
- * evaluating the arguments multiple times, which seems worse).
+ * Like standard library function strncpy(), except that result string
+ * is guaranteed to be null-terminated --- that is, at most N-1 bytes
+ * of the source string will be kept.
+ * Also, the macro returns no result (too hard to do that without
+ * evaluating the arguments multiple times, which seems worse).
+ *
+ * BTW: when you need to copy a non-null-terminated string (like a text
+ * datum) and add a null, do not do it with StrNCpy(..., len+1). That
+ * might seem to work, but it fetches one byte more than there is in the
+ * text object. One fine day you'll have a SIGSEGV because there isn't
+ * another byte before the end of memory. Don't laugh, we've had real
+ * live bug reports from real live users over exactly this mistake.
+ * Do it honestly with "memcpy(dst,src,len); dst[len] = '\0';", instead.
*/
#define StrNCpy(dst,src,len) \
do \
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-31 12:25:45 +0000