8000 Don't override arguments set via options with positional arguments. · jcsston/postgres@156fac5 · GitHub
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Don't override arguments set via options with positional arguments.
A number of utility programs were rather careless about paremeters that can be set via both an option argument and a positional argument. This leads to results which can violate the Principal Of Least Astonishment. These changes refuse to use positional arguments to override settings that have been made via positional arguments. The changes are backpatched to all live branches.
1 parent 05504f1 commit 156fac5

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6 files changed

+75
-38
lines changed

6 files changed

+75
-38
lines changed

‎src/bin/initdb/initdb.c

Lines changed: 5 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2563,8 +2563,11 @@ main(int argc, char *argv[])
25632563
}
25642564

25652565

2566-
/* Non-option argument specifies 10000 data directory */
2567-
if (optind < argc)
2566+
/*
2567+
* Non-option argument specifies data directory
2568+
* as long as it wasn't already specified with -D / --pgdata
2569+
*/
2570+
if (optind < argc && strlen(pg_data) == 0)
25682571
{
25692572
pg_data = xstrdup(argv[optind]);
25702573
optind++;

‎src/bin/scripts/clusterdb.c

Lines changed: 15 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -106,18 +106,22 @@ main(int argc, char *argv[])
106106
}
107107
}
108108

109-
switch (argc - optind)
109+
/*
110+
* Non-option argument specifies database name
111+
* as long as it wasn't already specified with -d / --dbname
112+
*/
113+
if (optind < argc && dbname == NULL)
110114
{
111-
case 0:
112-
break;
113-
case 1:
114-
dbname = argv[optind];
115-
break;
116-
default:
117-
fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
118-
progname, argv[optind + 1]);
119-
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
120-
exit(1);
115+
dbname = argv[optind];
116+
optind++;
117+
}
118+
119+
if (optind < argc)
120+
{
121+
fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
122+
progname, argv[optind + 1]);
123+
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
124+
exit(1);
121125
}
122126

123127
setup_cancel_handler();

‎src/bin/scripts/createlang.c

Lines changed: 12 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -91,14 +91,24 @@ main(int argc, char *argv[])
9191
}
9292
}
9393

94+
/*
95+
* We set dbname from positional arguments if it is not
96+
* already set by option arguments -d. If not doing
97+
* listlangs, positional dbname must follow positional
98+
* langname.
99+
*/
100+
94101
if (argc - optind > 0)
95102
{
96103
if (listlangs)
97-
dbname = argv[optind++];
104+
{
105+
if (dbname == NULL)
106+
dbname = argv[optind++];
107+
}
98108
else
99109
{
100110
langname = argv[optind++];
101-
if (argc - optind > 0)
111+
if (argc - optind > 0 && dbname == NULL)
102112
dbname = argv[optind++];
103113
}
104114
}

‎src/bin/scripts/droplang.c

Lines changed: 12 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -102,14 +102,24 @@ main(int argc, char *argv[])
102102
}
103103
}
104104

105+
/*
106+
* We set dbname from positional arguments if it is not
107+
* already set by option arguments -d. If not doing
108+
* listlangs, positional dbname must follow positional
109+
* langname.
110+
*/
111+
105112
if (argc - optind > 0)
106113
{
107114
if (listlangs)
108-
dbname = argv[optind++];
115+
{
116+
if (dbname == NULL)
117+
dbname = argv[optind++];
118+
}
109119
else
110120
{
111121
langname = argv[optind++];
112-
if (argc - optind > 0)
122+
if (argc - optind > 0 && dbname == NULL)
113123
dbname = argv[optind++];
114124
}
115125
}

‎src/bin/scripts/reindexdb.c

Lines changed: 15 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -116,17 +116,22 @@ main(int argc, char *argv[])
116116
}
117117
}
118118

119-
switch (argc - optind)
119+
/*
120+
* Non-option argument specifies database name
121+
* as long as it wasn't already specified with -d / --dbname
122+
*/
123+
if (optind < argc && dbname == NULL)
120124
{
121-
case 0:
122-
break;
123-
case 1:
124-
dbname = argv[optind];
125-
break;
126-
default:
127-
fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"), progname, argv[optind + 1]);
128-
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
129-
exit(1);
125+
dbname = argv[optind];
126+
optind++;
127+
}
128+
129+
if (optind < argc)
130+
{
131+
fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
132+
progname, argv[optind + 1]);
133+
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
134+
exit(1);
130135
}
131136

132137
setup_cancel_handler();

‎src/bin/scripts/vacuumdb.c

Lines changed: 16 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -129,18 +129,23 @@ main(int argc, char *argv[])
129129
}
130130
}
131131

132-
switch (argc - optind)
132+
133+
/*
134+
* Non-option argument specifies database name
135+
* as long as it wasn't already specified with -d / --dbname
136+
*/
137+
if (optind < argc && dbname == NULL)
133138
{
134-
case 0:
135-
break;
136-
case 1:
137-
dbname = argv[optind];
138-
break;
139-
default:
140-
fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
141-
progname, argv[optind + 1]);
142-
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
143-
exit(1);
139+
dbname = argv[optind];
140+
optind++;
141+
}
142+
143+
if (optind < argc)
144+
{
145+
fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
146+
progname, argv[optind + 1]);
147+
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
148+
exit(1);
144149
}
145150

146151
if (analyze_only)

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