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Clean up checking for pg_dumpall output directory

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Coverity objected to the original code, and in any case this is much
cleaner, using the existing routine pg_check_dir() instead of rolling
its own test.

Per suggestion from Tom Lane.
This commit is contained in:
Andrew Dunstan
2025-04-06 17:00:58 -04:00
parent 218ab68275
commit 643a1a6198
1 changed files with 20 additions and 38 deletions
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58
src/bin/pg_dump/pg_dumpall.c
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@ -21,6 +21,7 @@
#include "catalog/pg_authid_d.h"
#include "common/connect.h"
#include "common/file_perm.h"
#include "common/file_utils.h"
#include "common/hashfn_unstable.h"
#include "common/logging.h"
@ -1954,49 +1955,30 @@ read_dumpall_filters(const char *filename, SimpleStringList *pattern)
static void
create_or_open_dir(const char *dirname)
{
struct stat st;
bool is_empty = false;
int ret;
/* we accept an empty existing directory */
if (stat(dirname, &st) == 0 && S_ISDIR(st.st_mode))
switch ((ret = pg_check_dir(dirname)))
{
DIR *dir = opendir(dirname);
if (dir)
{
struct dirent *d;
is_empty = true;
while (errno = 0, (d = readdir(dir)))
{
if (strcmp(d->d_name, ".") != 0 && strcmp(d->d_name, "..") != 0)
{
is_empty = false;
break;
}
}
if (errno)
pg_fatal("could not read directory \"%s\": %m",
case -1:
/* opendir failed but not with ENOENT */
pg_fatal("could not open directory \"%s\": %m", dirname);
break;
case 0:
/* directory does not exist */
if (mkdir(dirname, pg_dir_create_mode) < 0)
pg_fatal("could not create directory \"%s\": %m", dirname);
break;
case 1:
/* exists and is empty, fix perms */
if (chmod(dirname, pg_dir_create_mode) != 0)
pg_fatal("could not change permissions of directory \"%s\": %m",
dirname);
if (closedir(dir))
pg_fatal("could not close directory \"%s\": %m",
dirname);
}
if (!is_empty)
{
pg_log_error("directory \"%s\" exists but is not empty", dirname);
pg_log_error_hint("Either remove the directory "
"\"%s\" or its contents.",
dirname);
exit_nicely(1);
}
break;
default:
/* exists and is not empty */
pg_fatal("directory \"%s\" is not empty", dirname);
}
else if (mkdir(dirname, 0700) < 0)
pg_fatal("could not create directory \"%s\": %m", dirname);
}
/*