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Fix a potential free() of string literal in oid2name, per report from

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Michael Fuhr. Along the way, fix a bunch of accesses to uninitialized
memory, add a mystrdup() routine and use it to cleanup some code.
This commit is contained in:
Neil Conway 2004-12-02 06:14:50 +00:00
parent b383c1db85
commit e02ef267fc
1 changed files with 25 additions and 12 deletions

37
contrib/oid2name/oid2name.c

@ -46,6 +46,7 @@ struct options
/* function prototypes */
void get_opts(int, char **, struct options *);
void *myalloc(size_t size);
char *mystrdup(const char *str);
void add_one_elt(char *eltname, eary *eary);
char *get_comma_elts(eary *eary);
PGconn *sql_conn(struct options *);
@ -68,6 +69,11 @@ get_opts(int argc, char **argv, struct options * my_opts)
my_opts->nodb = false;
my_opts->extended = false;
my_opts->tablespaces = false;
my_opts->dbname = NULL;
my_opts->hostname = NULL;
my_opts->port = NULL;
my_opts->username = NULL;
my_opts->password = NULL;
/* get opts */
while ((c = getopt(argc, argv, "H:p:U:P:d:t:o:f:qSxish?")) != -1)
@ -76,8 +82,7 @@ get_opts(int argc, char **argv, struct options * my_opts)
{
/* specify the database */
case 'd':
my_opts->dbname = (char *) myalloc(strlen(optarg));
sscanf(optarg, "%s", my_opts->dbname);
my_opts->dbname = mystrdup(optarg);
break;
/* specify one tablename to show */
@ -102,26 +107,22 @@ get_opts(int argc, char **argv, struct options * my_opts)
/* host to connect to */
case 'H':
my_opts->hostname = (char *) myalloc(strlen(optarg));
sscanf(optarg, "%s", my_opts->hostname);
my_opts->hostname = mystrdup(optarg);
break;
/* port to connect to on remote host */
case 'p':
my_opts->port = (char *) myalloc(strlen(optarg));
sscanf(optarg, "%s", my_opts->port);
my_opts->port = mystrdup(optarg);
break;
/* username */
case 'U':
my_opts->username = (char *) myalloc(strlen(optarg));
sscanf(optarg, "%s", my_opts->username);
my_opts->username = mystrdup(optarg);
break;
/* password */
case 'P':
my_opts->password = (char *) myalloc(strlen(optarg));
sscanf(optarg, "%s", my_opts->password);
my_opts->password = mystrdup(optarg);
break;
/* display system tables */
@ -183,6 +184,18 @@ myalloc(size_t size)
return ptr;
}
char *
mystrdup(const char *str)
{
char *result = strdup(str);
if (!result)
{
fprintf(stderr, "out of memory");
exit(1);
}
return result;
}
/*
* add_one_elt
*
@ -208,7 +221,7 @@ add_one_elt(char *eltname, eary *eary)
}
}
eary->array[eary->num] = strdup(eltname);
eary->array[eary->num] = mystrdup(eltname);
eary->num++;
}
@ -227,7 +240,7 @@ get_comma_elts(eary *eary)
int i, length = 0;
if (eary->num == 0)
return "";
return mystrdup("");
/*
* PQescapeString wants 2 * length + 1 bytes of breath space. Add two