Age Owner Branch data TLA Line data Source code
1 : : /*-------------------------------------------------------------------------
2 : : *
3 : : * pg_backup_utils.c
4 : : * Utility routines shared by pg_dump and pg_restore
5 : : *
6 : : *
7 : : * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
8 : : * Portions Copyright (c) 1994, Regents of the University of California
9 : : *
10 : : * src/bin/pg_dump/pg_backup_utils.c
11 : : *
12 : : *-------------------------------------------------------------------------
13 : : */
14 : : #include "postgres_fe.h"
15 : :
16 : : #include "parallel.h"
17 : : #include "pg_backup_utils.h"
18 : :
19 : : /* Globals exported by this file */
20 : : const char *progname = NULL;
21 : :
22 : : #define MAX_ON_EXIT_NICELY 20
23 : :
24 : : static struct
25 : : {
26 : : on_exit_nicely_callback function;
27 : : void *arg;
28 : : } on_exit_nicely_list[MAX_ON_EXIT_NICELY];
29 : :
30 : : static int on_exit_nicely_index;
31 : :
32 : : /*
33 : : * Parse a --section=foo command line argument.
34 : : *
35 : : * Set or update the bitmask in *dumpSections according to arg.
36 : : * dumpSections is initialised as DUMP_UNSECTIONED by pg_dump and
37 : : * pg_restore so they can know if this has even been called.
38 : : */
39 : : void
4036 heikki.linnakangas@i 40 :CBC 6 : set_dump_section(const char *arg, int *dumpSections)
41 : : {
42 : : /* if this is the first call, clear all the bits */
43 [ + - ]: 6 : if (*dumpSections == DUMP_UNSECTIONED)
44 : 6 : *dumpSections = 0;
45 : :
46 [ + + ]: 6 : if (strcmp(arg, "pre-data") == 0)
47 : 2 : *dumpSections |= DUMP_PRE_DATA;
48 [ + + ]: 4 : else if (strcmp(arg, "data") == 0)
49 : 2 : *dumpSections |= DUMP_DATA;
50 [ + - ]: 2 : else if (strcmp(arg, "post-data") == 0)
51 : 2 : *dumpSections |= DUMP_POST_DATA;
52 : : else
53 : : {
1840 peter@eisentraut.org 54 :UBC 0 : pg_log_error("unrecognized section name: \"%s\"", arg);
737 tgl@sss.pgh.pa.us 55 : 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
4036 heikki.linnakangas@i 56 : 0 : exit_nicely(1);
57 : : }
4036 heikki.linnakangas@i 58 :CBC 6 : }
59 : :
60 : :
61 : : /* Register a callback to be run when exit_nicely is invoked. */
62 : : void
63 : 215 : on_exit_nicely(on_exit_nicely_callback function, void *arg)
64 : : {
65 [ - + ]: 215 : if (on_exit_nicely_index >= MAX_ON_EXIT_NICELY)
737 tgl@sss.pgh.pa.us 66 :UBC 0 : pg_fatal("out of on_exit_nicely slots");
4036 heikki.linnakangas@i 67 :CBC 215 : on_exit_nicely_list[on_exit_nicely_index].function = function;
68 : 215 : on_exit_nicely_list[on_exit_nicely_index].arg = arg;
69 : 215 : on_exit_nicely_index++;
70 : 215 : }
71 : :
72 : : /*
73 : : * Run accumulated on_exit_nicely callbacks in reverse order and then exit
74 : : * without printing any message.
75 : : *
76 : : * If running in a parallel worker thread on Windows, we only exit the thread,
77 : : * not the whole process.
78 : : *
79 : : * Note that in parallel operation on Windows, the callback(s) will be run
80 : : * by each thread since the list state is necessarily shared by all threads;
81 : : * each callback must contain logic to ensure it does only what's appropriate
82 : : * for its thread. On Unix, callbacks are also run by each process, but only
83 : : * for callbacks established before we fork off the child processes. (It'd
84 : : * be cleaner to reset the list after fork(), and let each child establish
85 : : * its own callbacks; but then the behavior would be completely inconsistent
86 : : * between Windows and Unix. For now, just be sure to establish callbacks
87 : : * before forking to avoid inconsistency.)
88 : : */
89 : : void
90 : 267 : exit_nicely(int code)
91 : : {
92 : : int i;
93 : :
94 [ + + ]: 439 : for (i = on_exit_nicely_index - 1; i >= 0; i--)
2411 peter_e@gmx.net 95 : 172 : on_exit_nicely_list[i].function(code,
96 : : on_exit_nicely_list[i].arg);
97 : :
98 : : #ifdef WIN32
99 : : if (parallel_init_done && GetCurrentThreadId() != mainThreadId)
100 : : _endthreadex(code);
101 : : #endif
102 : :
4036 heikki.linnakangas@i 103 : 267 : exit(code);
104 : : }
|
