Header And Logo
|
#include "postgres.h"#include <pwd.h>#include <unistd.h>#include "bootstrap/bootstrap.h"#include "postmaster/postmaster.h"#include "tcop/tcopprot.h"#include "utils/help_config.h"#include "utils/pg_locale.h"#include "utils/ps_status.h"
Go to the source code of this file.
Functions | |
| static void | startup_hacks (const char *progname) |
| static void | help (const char *progname) |
| static void | check_root (const char *progname) |
| static char * | get_current_username (const char *progname) |
| int | main (int argc, char *argv[]) |
Variables | |
| const char * | progname |
| static void check_root | ( | const char * | progname | ) | [static] |
Definition at line 333 of file main.c.
References pgwin32_is_admin(), and write_stderr.
Referenced by main().
{
#ifndef WIN32
if (geteuid() == 0)
{
write_stderr("\"root\" execution of the PostgreSQL server is not permitted.\n"
"The server must be started under an unprivileged user ID to prevent\n"
"possible system security compromise. See the documentation for\n"
"more information on how to properly start the server.\n");
exit(1);
}
/*
* Also make sure that real and effective uids are the same. Executing as
* a setuid program from a root shell is a security hole, since on many
* platforms a nefarious subroutine could setuid back to root if real uid
* is root. (Since nobody actually uses postgres as a setuid program,
* trying to actively fix this situation seems more trouble than it's
* worth; we'll just expend the effort to check for it.)
*/
if (getuid() != geteuid())
{
write_stderr("%s: real and effective user IDs must match\n",
progname);
exit(1);
}
#else /* WIN32 */
if (pgwin32_is_admin())
{
write_stderr("Execution of PostgreSQL by a user with administrative permissions is not\n"
"permitted.\n"
"The server must be started under an unprivileged user ID to prevent\n"
"possible system security compromises. See the documentation for\n"
"more information on how to properly start the server.\n");
exit(1);
}
#endif /* WIN32 */
}
| static char * get_current_username | ( | const char * | progname | ) | [static] |
Definition at line 375 of file main.c.
References malloc, name, NULL, and write_stderr.
Referenced by main().
{
#ifndef WIN32
struct passwd *pw;
pw = getpwuid(geteuid());
if (pw == NULL)
{
write_stderr("%s: invalid effective UID: %d\n",
progname, (int) geteuid());
exit(1);
}
/* Allocate new memory because later getpwuid() calls can overwrite it. */
return strdup(pw->pw_name);
#else
unsigned long namesize = 256 /* UNLEN */ + 1;
char *name;
name = malloc(namesize);
if (!GetUserName(name, &namesize))
{
write_stderr("%s: could not determine user name (GetUserName failed)\n",
progname);
exit(1);
}
return name;
#endif
}
| static void help | ( | const char * | progname | ) | [static] |
Definition at line 270 of file main.c.
References _.
Referenced by main().
{
printf(_("%s is the PostgreSQL server.\n\n"), progname);
printf(_("Usage:\n %s [OPTION]...\n\n"), progname);
printf(_("Options:\n"));
#ifdef USE_ASSERT_CHECKING
printf(_(" -A 1|0 enable/disable run-time assert checking\n"));
#endif
printf(_(" -B NBUFFERS number of shared buffers\n"));
printf(_(" -c NAME=VALUE set run-time parameter\n"));
printf(_(" -C NAME print value of run-time parameter, then exit\n"));
printf(_(" -d 1-5 debugging level\n"));
printf(_(" -D DATADIR database directory\n"));
printf(_(" -e use European date input format (DMY)\n"));
printf(_(" -F turn fsync off\n"));
printf(_(" -h HOSTNAME host name or IP address to listen on\n"));
printf(_(" -i enable TCP/IP connections\n"));
printf(_(" -k DIRECTORY Unix-domain socket location\n"));
#ifdef USE_SSL
printf(_(" -l enable SSL connections\n"));
#endif
printf(_(" -N MAX-CONNECT maximum number of allowed connections\n"));
printf(_(" -o OPTIONS pass \"OPTIONS\" to each server process (obsolete)\n"));
printf(_(" -p PORT port number to listen on\n"));
printf(_(" -s show statistics after each query\n"));
printf(_(" -S WORK-MEM set amount of memory for sorts (in kB)\n"));
printf(_(" -V, --version output version information, then exit\n"));
printf(_(" --NAME=VALUE set run-time parameter\n"));
printf(_(" --describe-config describe configuration parameters, then exit\n"));
printf(_(" -?, --help show this help, then exit\n"));
printf(_("\nDeveloper options:\n"));
printf(_(" -f s|i|n|m|h forbid use of some plan types\n"));
printf(_(" -n do not reinitialize shared memory after abnormal exit\n"));
printf(_(" -O allow system table structure changes\n"));
printf(_(" -P disable system indexes\n"));
printf(_(" -t pa|pl|ex show timings after each query\n"));
printf(_(" -T send SIGSTOP to all backend processes if one dies\n"));
printf(_(" -W NUM wait NUM seconds to allow attach from a debugger\n"));
printf(_("\nOptions for single-user mode:\n"));
printf(_(" --single selects single-user mode (must be first argument)\n"));
printf(_(" DBNAME database name (defaults to user name)\n"));
printf(_(" -d 0-5 override debugging level\n"));
printf(_(" -E echo statement before execution\n"));
printf(_(" -j do not use newline as interactive query delimiter\n"));
printf(_(" -r FILENAME send stdout and stderr to given file\n"));
printf(_("\nOptions for bootstrapping mode:\n"));
printf(_(" --boot selects bootstrapping mode (must be first argument)\n"));
printf(_(" DBNAME database name (mandatory argument in bootstrapping mode)\n"));
printf(_(" -r FILENAME send stdout and stderr to given file\n"));
printf(_(" -x NUM internal use\n"));
printf(_("\nPlease read the documentation for the complete list of run-time\n"
"configuration settings and how to set them on the command line or in\n"
"the configuration file.\n\n"
"Report bugs to <[email protected]>.\n"));
}
| int main | ( | int | argc, | |
| char * | argv[] | |||
| ) |
Definition at line 59 of file main.c.
References AuxiliaryProcessMain(), check_root(), get_current_username(), get_progname(), GucInfoMain(), help(), NULL, pg_perm_setlocale(), PG_TEXTDOMAIN, pgwin32_install_crashdump_handler(), pgwin32_signal_initialize(), PostgresMain(), PostmasterMain(), progname, save_ps_display_args(), set_pglocale_pgservice(), startup_hacks(), and unsetenv.
{
progname = get_progname(argv[0]);
/*
* Platform-specific startup hacks
*/
startup_hacks(progname);
/*
* Remember the physical location of the initially given argv[] array for
* possible use by ps display. On some platforms, the argv[] storage must
* be overwritten in order to set the process title for ps. In such cases
* save_ps_display_args makes and returns a new copy of the argv[] array.
*
* save_ps_display_args may also move the environment strings to make
* extra room. Therefore this should be done as early as possible during
* startup, to avoid entanglements with code that might save a getenv()
* result pointer.
*/
argv = save_ps_display_args(argc, argv);
/*
* If supported on the current platform, set up a handler to be called if
* the backend/postmaster crashes with a fatal signal or exception.
*/
#if defined(WIN32) && defined(HAVE_MINIDUMP_TYPE)
pgwin32_install_crashdump_handler();
#endif
/*
* Set up locale information from environment. Note that LC_CTYPE and
* LC_COLLATE will be overridden later from pg_control if we are in an
* already-initialized database. We set them here so that they will be
* available to fill pg_control during initdb. LC_MESSAGES will get set
* later during GUC option processing, but we set it here to allow startup
* error messages to be localized.
*/
set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("postgres"));
#ifdef WIN32
/*
* Windows uses codepages rather than the environment, so we work around
* that by querying the environment explicitly first for LC_COLLATE and
* LC_CTYPE. We have to do this because initdb passes those values in the
* environment. If there is nothing there we fall back on the codepage.
*/
{
char *env_locale;
if ((env_locale = getenv("LC_COLLATE")) != NULL)
pg_perm_setlocale(LC_COLLATE, env_locale);
else
pg_perm_setlocale(LC_COLLATE, "");
if ((env_locale = getenv("LC_CTYPE")) != NULL)
pg_perm_setlocale(LC_CTYPE, env_locale);
else
pg_perm_setlocale(LC_CTYPE, "");
}
#else
pg_perm_setlocale(LC_COLLATE, "");
pg_perm_setlocale(LC_CTYPE, "");
#endif
#ifdef LC_MESSAGES
pg_perm_setlocale(LC_MESSAGES, "");
#endif
/*
* We keep these set to "C" always, except transiently in pg_locale.c; see
* that file for explanations.
*/
pg_perm_setlocale(LC_MONETARY, "C");
pg_perm_setlocale(LC_NUMERIC, "C");
pg_perm_setlocale(LC_TIME, "C");
/*
* Now that we have absorbed as much as we wish to from the locale
* environment, remove any LC_ALL setting, so that the environment
* variables installed by pg_perm_setlocale have force.
*/
unsetenv("LC_ALL");
/*
* Catch standard options before doing much else
*/
if (argc > 1)
{
if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
{
help(progname);
exit(0);
}
if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
{
puts("postgres (PostgreSQL) " PG_VERSION);
exit(0);
}
}
/*
* Make sure we are not running as root.
*/
check_root(progname);
/*
* Dispatch to one of various subprograms depending on first argument.
*/
#ifdef EXEC_BACKEND
if (argc > 1 && strncmp(argv[1], "--fork", 6) == 0)
SubPostmasterMain(argc, argv); /* does not return */
#endif
#ifdef WIN32
/*
* Start our win32 signal implementation
*
* SubPostmasterMain() will do this for itself, but the remaining modes
* need it here
*/
pgwin32_signal_initialize();
#endif
if (argc > 1 && strcmp(argv[1], "--boot") == 0)
AuxiliaryProcessMain(argc, argv); /* does not return */
else if (argc > 1 && strcmp(argv[1], "--describe-config") == 0)
GucInfoMain(); /* does not return */
else if (argc > 1 && strcmp(argv[1], "--single") == 0)
PostgresMain(argc, argv,
NULL, /* no dbname */
get_current_username(progname)); /* does not return */
else
PostmasterMain(argc, argv); /* does not return */
abort(); /* should not get here */
}
| static void startup_hacks | ( | const char * | progname | ) | [static] |
Definition at line 214 of file main.c.
References NULL, strerror(), and write_stderr.
Referenced by main().
{
/*
* On some platforms, unaligned memory accesses result in a kernel trap;
* the default kernel behavior is to emulate the memory access, but this
* results in a significant performance penalty. We want PG never to make
* such unaligned memory accesses, so this code disables the kernel
* emulation: unaligned accesses will result in SIGBUS instead.
*/
#ifdef NOFIXADE
#if defined(__alpha) /* no __alpha__ ? */
{
int buffer[] = {SSIN_UACPROC, UAC_SIGBUS | UAC_NOPRINT};
if (setsysinfo(SSI_NVPAIRS, buffer, 1, (caddr_t) NULL,
(unsigned long) NULL) < 0)
write_stderr("%s: setsysinfo failed: %s\n",
progname, strerror(errno));
}
#endif /* __alpha */
#endif /* NOFIXADE */
/*
* Windows-specific execution environment hacking.
*/
#ifdef WIN32
{
WSADATA wsaData;
int err;
/* Make output streams unbuffered by default */
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stderr, NULL, _IONBF, 0);
/* Prepare Winsock */
err = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (err != 0)
{
write_stderr("%s: WSAStartup failed: %d\n",
progname, err);
exit(1);
}
/* In case of general protection fault, don't show GUI popup box */
SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX);
}
#endif /* WIN32 */
}
1.7.1