PostgreSQL Source Code git master
All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Pages
pgcheckdir.c File Reference
#include "c.h"
#include <dirent.h>
Include dependency graph for pgcheckdir.c:

Go to the source code of this file.

Functions

int pg_check_dir (const char *dir)
 

Function Documentation

◆ pg_check_dir()

int pg_check_dir ( const char *  dir)

Definition at line 33 of file pgcheckdir.c.

34{
35 int result = 1;
36 DIR *chkdir;
37 struct dirent *file;
38 bool dot_found = false;
39 bool mount_found = false;
40 int readdir_errno;
41
42 chkdir = opendir(dir);
43 if (chkdir == NULL)
44 return (errno == ENOENT) ? 0 : -1;
45
46 while (errno = 0, (file = readdir(chkdir)) != NULL)
47 {
48 if (strcmp(".", file->d_name) == 0 ||
49 strcmp("..", file->d_name) == 0)
50 {
51 /* skip this and parent directory */
52 continue;
53 }
54#ifndef WIN32
55 /* file starts with "." */
56 else if (file->d_name[0] == '.')
57 {
58 dot_found = true;
59 }
60 /* lost+found directory */
61 else if (strcmp("lost+found", file->d_name) == 0)
62 {
63 mount_found = true;
64 }
65#endif
66 else
67 {
68 result = 4; /* not empty */
69 break;
70 }
71 }
72
73 if (errno)
74 result = -1; /* some kind of I/O error? */
75
76 /* Close chkdir and avoid overwriting the readdir errno on success */
77 readdir_errno = errno;
78 if (closedir(chkdir))
79 result = -1; /* error executing closedir */
80 else
81 errno = readdir_errno;
82
83 /* We report on mount point if we find a lost+found directory */
84 if (result == 1 && mount_found)
85 result = 3;
86
87 /* We report on dot-files if we _only_ find dot files */
88 if (result == 1 && dot_found)
89 result = 2;
90
91 return result;
92}
int closedir(DIR *)
Definition: dirent.c:127
struct dirent * readdir(DIR *)
Definition: dirent.c:78
DIR * opendir(const char *)
Definition: dirent.c:33
Definition: dirent.c:26
Definition: dirent.h:10
char d_name[MAX_PATH]
Definition: dirent.h:15

References closedir(), dirent::d_name, opendir(), and readdir().

Referenced by bbsink_server_new(), cleanup_output_dirs(), create_data_directory(), create_fullpage_directory(), create_output_directory(), create_xlog_or_symlink(), main(), and verify_dir_is_empty_or_create().