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Code

Prevent file descriptor leak from failed COPY.

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This commit is contained in:
Bruce Momjian 1998-08-29 18:19:59 +00:00
parent 88800aac14
commit f1d0e64ff9
1 changed files with 16 additions and 6 deletions
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22
src/backend/commands/copy.c
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@ -6,7 +6,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.56 1998/08/29 05:27:15 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.57 1998/08/29 18:19:59 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -108,12 +108,21 @@ DoCopy(char *relname, bool binary, bool oids, bool from, bool pipe,
the class.
----------------------------------------------------------------------------*/
FILE *fp;
static FILE *fp; /* static for cleanup */
static bool file_opened = false; /* static for cleanup */
Relation rel;
extern char *UserName; /* defined in global.c */
const AclMode required_access = from ? ACL_WR : ACL_RD;
int result;
/*
* Close previous file opened for COPY but failed with elog().
* There should be a better way, but would not be modular.
* Prevents file descriptor leak. bjm 1998/08/29
*/
if (file_opened)
FreeFile(fp);
rel = heap_openr(relname);
if (rel == NULL)
elog(ERROR, "COPY command failed. Class %s "
@ -146,14 +155,13 @@ DoCopy(char *relname, bool binary, bool oids, bool from, bool pipe,
}
else
{
/* if we elog() out, the file stays open */
fp = AllocateFile(filename, "r");
if (fp == NULL)
elog(ERROR, "COPY command, running in backend with "
"effective uid %d, could not open file '%s' for "
"reading. Errno = %s (%d).",
geteuid(), filename, strerror(errno), errno);
/* Above should not return */
file_opened = true;
}
CopyFrom(rel, binary, oids, fp, delim);
}
@ -174,7 +182,6 @@ DoCopy(char *relname, bool binary, bool oids, bool from, bool pipe,
mode_t oumask; /* Pre-existing umask value */
oumask = umask((mode_t) 0);
/* if we elog() out, the file stays open */
fp = AllocateFile(filename, "w");
umask(oumask);
if (fp == NULL)
@ -182,12 +189,15 @@ DoCopy(char *relname, bool binary, bool oids, bool from, bool pipe,
"effective uid %d, could not open file '%s' for "
"writing. Errno = %s (%d).",
geteuid(), filename, strerror(errno), errno);
/* Above should not return */
file_opened = true;
}
CopyTo(rel, binary, oids, fp, delim);
}
if (!pipe)
{
FreeFile(fp);
file_opened = false;
}
else if (!from && !binary)
{
fputs("\\.\n", fp);