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Commit6711999

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Move a couple of initdb's subroutines into src/port/.
mkdir_p and check_data_dir will be useful in CREATE TABLESPACE, since wehave agreed that that command should handle subdirectory creation just likeinitdb creates the PGDATA directory. Push them into src/port/ so that theyare available to both initdb and the backend. Rename to pg_mkdir_p andpg_check_dir, just to be on the safe side. Add FreeBSD's copyright noticeto pgmkdirp.c, since that's where the code came from originally (thisreally should have been in initdb.c). Very marginal code/comment cleanup.
1 parent04f4e10 commit6711999

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5 files changed

+240
-169
lines changed

5 files changed

+240
-169
lines changed

‎src/bin/initdb/initdb.c‎

Lines changed: 7 additions & 165 deletions
Original file line numberDiff line numberDiff line change
@@ -40,7 +40,6 @@
4040
*
4141
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
4242
* Portions Copyright (c) 1994, Regents of the University of California
43-
* Portions taken from FreeBSD.
4443
*
4544
* src/bin/initdb/initdb.c
4645
*
@@ -152,11 +151,9 @@ static char **filter_lines_with_token(char **lines, const char *token);
152151
staticchar**readfile(constchar*path);
153152
staticvoidwritefile(char*path,char**lines);
154153
staticFILE*popen_check(constchar*command,constchar*mode);
155-
staticintmkdir_p(char*path,mode_tomode);
156154
staticvoidexit_nicely(void);
157155
staticchar*get_id(void);
158156
staticchar*get_encoding_id(char*encoding_name);
159-
staticintcheck_data_dir(char*dir);
160157
staticboolmkdatadir(constchar*subdir);
161158
staticvoidset_input(char**dest,char*filename);
162159
staticvoidcheck_input(char*path);
@@ -470,110 +467,6 @@ popen_check(const char *command, const char *mode)
470467
returncmdfd;
471468
}
472469

473-
/* source stolen from FreeBSD /src/bin/mkdir/mkdir.c and adapted */
474-
475-
/*
476-
* this tries to build all the elements of a path to a directory a la mkdir -p
477-
* we assume the path is in canonical form, i.e. uses / as the separator
478-
* we also assume it isn't null.
479-
*
480-
* note that on failure, the path arg has been modified to show the particular
481-
* directory level we had problems with.
482-
*/
483-
staticint
484-
mkdir_p(char*path,mode_tomode)
485-
{
486-
structstatsb;
487-
mode_tnumask,
488-
oumask;
489-
intfirst,
490-
last,
491-
retval;
492-
char*p;
493-
494-
p=path;
495-
oumask=0;
496-
retval=0;
497-
498-
#ifdefWIN32
499-
/* skip network and drive specifiers for win32 */
500-
if (strlen(p) >=2)
501-
{
502-
if (p[0]=='/'&&p[1]=='/')
503-
{
504-
/* network drive */
505-
p=strstr(p+2,"/");
506-
if (p==NULL)
507-
return1;
508-
}
509-
elseif (p[1]==':'&&
510-
((p[0] >='a'&&p[0] <='z')||
511-
(p[0] >='A'&&p[0] <='Z')))
512-
{
513-
/* local drive */
514-
p+=2;
515-
}
516-
}
517-
#endif
518-
519-
if (p[0]=='/')/* Skip leading '/'. */
520-
++p;
521-
for (first=1,last=0; !last;++p)
522-
{
523-
if (p[0]=='\0')
524-
last=1;
525-
elseif (p[0]!='/')
526-
continue;
527-
*p='\0';
528-
if (!last&&p[1]=='\0')
529-
last=1;
530-
if (first)
531-
{
532-
/*
533-
* POSIX 1003.2: For each dir operand that does not name an
534-
* existing directory, effects equivalent to those caused by the
535-
* following command shall occcur:
536-
*
537-
* mkdir -p -m $(umask -S),u+wx $(dirname dir) && mkdir [-m mode]
538-
* dir
539-
*
540-
* We change the user's umask and then restore it, instead of
541-
* doing chmod's.
542-
*/
543-
oumask=umask(0);
544-
numask=oumask& ~(S_IWUSR |S_IXUSR);
545-
(void)umask(numask);
546-
first=0;
547-
}
548-
if (last)
549-
(void)umask(oumask);
550-
551-
/* check for pre-existing directory; ok if it's a parent */
552-
if (stat(path,&sb)==0)
553-
{
554-
if (!S_ISDIR(sb.st_mode))
555-
{
556-
if (last)
557-
errno=EEXIST;
558-
else
559-
errno=ENOTDIR;
560-
retval=1;
561-
break;
562-
}
563-
}
564-
elseif (mkdir(path,last ?omode :S_IRWXU |S_IRWXG |S_IRWXO)<0)
565-
{
566-
retval=1;
567-
break;
568-
}
569-
if (!last)
570-
*p='/';
571-
}
572-
if (!first&& !last)
573-
(void)umask(oumask);
574-
returnretval;
575-
}
576-
577470
/*
578471
* clean up any files we created on failure
579472
* if we created the data directory remove it too
@@ -801,59 +694,6 @@ find_matching_ts_config(const char *lc_type)
801694
}
802695

803696

804-
/*
805-
* make sure the directory either doesn't exist or is empty
806-
*
807-
* Returns 0 if nonexistent, 1 if exists and empty, 2 if not empty,
808-
* or -1 if trouble accessing directory
809-
*/
810-
staticint
811-
check_data_dir(char*dir)
812-
{
813-
DIR*chkdir;
814-
structdirent*file;
815-
intresult=1;
816-
817-
errno=0;
818-
819-
chkdir=opendir(dir);
820-
821-
if (!chkdir)
822-
return (errno==ENOENT) ?0 :-1;
823-
824-
while ((file=readdir(chkdir))!=NULL)
825-
{
826-
if (strcmp(".",file->d_name)==0||
827-
strcmp("..",file->d_name)==0)
828-
{
829-
/* skip this and parent directory */
830-
continue;
831-
}
832-
else
833-
{
834-
result=2;/* not empty */
835-
break;
836-
}
837-
}
838-
839-
#ifdefWIN32
840-
841-
/*
842-
* This fix is in mingw cvs (runtime/mingwex/dirent.c rev 1.4), but not in
843-
* released version
844-
*/
845-
if (GetLastError()==ERROR_NO_MORE_FILES)
846-
errno=0;
847-
#endif
848-
849-
closedir(chkdir);
850-
851-
if (errno!=0)
852-
result=-1;/* some kind of I/O error? */
853-
854-
returnresult;
855-
}
856-
857697
/*
858698
* make the data directory (or one of its subdirectories if subdir is not NULL)
859699
*/
@@ -870,7 +710,7 @@ mkdatadir(const char *subdir)
870710
else
871711
strcpy(path,pg_data);
872712

873-
if (mkdir_p(path,S_IRWXU)==0)
713+
if (pg_mkdir_p(path,S_IRWXU)==0)
874714
return true;
875715

876716
fprintf(stderr,_("%s: could not create directory \"%s\": %s\n"),
@@ -2929,7 +2769,7 @@ main(int argc, char *argv[])
29292769
pqsignal(SIGPIPE,SIG_IGN);
29302770
#endif
29312771

2932-
switch (check_data_dir(pg_data))
2772+
switch (pg_check_dir(pg_data))
29332773
{
29342774
case0:
29352775
/* PGDATA not there, must create it */
@@ -2995,16 +2835,16 @@ main(int argc, char *argv[])
29952835
exit_nicely();
29962836
}
29972837

2998-
/* check if the specified xlog directory is empty */
2999-
switch (check_data_dir(xlog_dir))
2838+
/* check if the specified xlog directoryexists/is empty */
2839+
switch (pg_check_dir(xlog_dir))
30002840
{
30012841
case0:
30022842
/* xlog directory not there, must create it */
30032843
printf(_("creating directory %s ... "),
30042844
xlog_dir);
30052845
fflush(stdout);
30062846

3007-
if (mkdir_p(xlog_dir,S_IRWXU)!=0)
2847+
if (pg_mkdir_p(xlog_dir,S_IRWXU)!=0)
30082848
{
30092849
fprintf(stderr,_("%s: could not create directory \"%s\": %s\n"),
30102850
progname,xlog_dir,strerror(errno));
@@ -3015,6 +2855,7 @@ main(int argc, char *argv[])
30152855

30162856
made_new_xlogdir= true;
30172857
break;
2858+
30182859
case1:
30192860
/* Present but empty, fix permissions and use it */
30202861
printf(_("fixing permissions on existing directory %s ... "),
@@ -3032,6 +2873,7 @@ main(int argc, char *argv[])
30322873

30332874
found_existing_xlogdir= true;
30342875
break;
2876+
30352877
case2:
30362878
/* Present and not empty */
30372879
fprintf(stderr,

‎src/include/port.h‎

Lines changed: 6 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -441,4 +441,10 @@ extern intpg_get_encoding_from_locale(const char *ctype);
441441
externchar*inet_net_ntop(intaf,constvoid*src,intbits,
442442
char*dst,size_tsize);
443443

444+
/* port/pgcheckdir.c */
445+
externintpg_check_dir(constchar*dir);
446+
447+
/* port/pgmkdirp.c */
448+
externintpg_mkdir_p(char*path,intomode);
449+
444450
#endif/* PG_PORT_H */

‎src/port/Makefile‎

Lines changed: 6 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -14,8 +14,8 @@
1414
#libpgport_srv.a - contains object files without FRONTEND defined,
1515
#for use only by the backend binaries
1616
#
17-
# LIBOBJS is set by configure (via Makefile.global) to be the list of
18-
#objectfiles that are conditionally needed as determined by configure's probing.
17+
# LIBOBJS is set by configure (via Makefile.global) to be the list of object
18+
# files that are conditionally needed as determined by configure's probing.
1919
# OBJS adds additional object files that are always compiled.
2020
#
2121
# IDENTIFICATION
@@ -30,8 +30,10 @@ include $(top_builddir)/src/Makefile.global
3030
overrideCPPFLAGS := -I$(top_builddir)/src/port -DFRONTEND$(CPPFLAGS)
3131
LIBS +=$(PTHREAD_LIBS)
3232

33-
OBJS =$(LIBOBJS) chklocale.o dirmod.o exec.o inet_net_ntop.o noblock.o path.o\
34-
pgsleep.o pgstrcasecmp.o qsort.o qsort_arg.o sprompt.o thread.o
33+
OBJS =$(LIBOBJS) chklocale.o dirmod.o exec.o inet_net_ntop.o noblock.o\
34+
path.o pgcheckdir.o pgmkdirp.o pgsleep.o pgstrcasecmp.o\
35+
qsort.o qsort_arg.o sprompt.o thread.o
36+
3537
ifneq (,$(filter$(PORTNAME),cygwin win32))
3638
OBJS += pipe.o
3739
endif

‎src/port/pgcheckdir.c‎

Lines changed: 73 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,73 @@
1+
/*-------------------------------------------------------------------------
2+
*
3+
* src/port/pgcheckdir.c
4+
*
5+
* A simple subroutine to check whether a directory exists and is empty or not.
6+
* Useful in both initdb and the backend.
7+
*
8+
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
9+
* Portions Copyright (c) 1994, Regents of the University of California
10+
*
11+
*-------------------------------------------------------------------------
12+
*/
13+
14+
#include"c.h"
15+
16+
#include<dirent.h>
17+
18+
19+
/*
20+
* Test to see if a directory exists and is empty or not.
21+
*
22+
* Returns:
23+
*0 if nonexistent
24+
*1 if exists and empty
25+
*2 if exists and not empty
26+
*-1 if trouble accessing directory (errno reflects the error)
27+
*/
28+
int
29+
pg_check_dir(constchar*dir)
30+
{
31+
intresult=1;
32+
DIR*chkdir;
33+
structdirent*file;
34+
35+
errno=0;
36+
37+
chkdir=opendir(dir);
38+
39+
if (chkdir==NULL)
40+
return (errno==ENOENT) ?0 :-1;
41+
42+
while ((file=readdir(chkdir))!=NULL)
43+
{
44+
if (strcmp(".",file->d_name)==0||
45+
strcmp("..",file->d_name)==0)
46+
{
47+
/* skip this and parent directory */
48+
continue;
49+
}
50+
else
51+
{
52+
result=2;/* not empty */
53+
break;
54+
}
55+
}
56+
57+
#ifdefWIN32
58+
59+
/*
60+
* This fix is in mingw cvs (runtime/mingwex/dirent.c rev 1.4), but not in
61+
* released version
62+
*/
63+
if (GetLastError()==ERROR_NO_MORE_FILES)
64+
errno=0;
65+
#endif
66+
67+
closedir(chkdir);
68+
69+
if (errno!=0)
70+
result=-1;/* some kind of I/O error? */
71+
72+
returnresult;
73+
}

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