mirror of
https://git.postgresql.org/git/postgresql.git
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359 lines
9.7 KiB
C
359 lines
9.7 KiB
C
/*
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* opt.c
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*
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* options functions
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*/
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#include "pg_upgrade.h"
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#include "getopt_long.h"
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#ifdef WIN32
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#include <io.h>
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#endif
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static void usage(migratorContext *ctx);
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static void validateDirectoryOption(migratorContext *ctx, char **dirpath,
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char *envVarName, char *cmdLineOption, char *description);
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static void get_pkglibdirs(migratorContext *ctx);
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static char *get_pkglibdir(migratorContext *ctx, const char *bindir);
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/*
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* parseCommandLine()
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*
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* Parses the command line (argc, argv[]) into the given migratorContext object
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* and initializes the rest of the object.
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*/
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void
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parseCommandLine(migratorContext *ctx, int argc, char *argv[])
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{
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static struct option long_options[] = {
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{"old-datadir", required_argument, NULL, 'd'},
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{"new-datadir", required_argument, NULL, 'D'},
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{"old-bindir", required_argument, NULL, 'b'},
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{"new-bindir", required_argument, NULL, 'B'},
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{"old-port", required_argument, NULL, 'p'},
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{"new-port", required_argument, NULL, 'P'},
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{"user", required_argument, NULL, 'u'},
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{"check", no_argument, NULL, 'c'},
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{"debug", no_argument, NULL, 'g'},
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{"debugfile", required_argument, NULL, 'G'},
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{"link", no_argument, NULL, 'k'},
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{"logfile", required_argument, NULL, 'l'},
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{"verbose", no_argument, NULL, 'v'},
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{NULL, 0, NULL, 0}
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};
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char option; /* Command line option */
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int optindex = 0; /* used by getopt_long */
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int user_id;
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if (getenv("PGUSER"))
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{
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pg_free(ctx->user);
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ctx->user = pg_strdup(ctx, getenv("PGUSER"));
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}
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ctx->progname = get_progname(argv[0]);
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ctx->old.port = getenv("PGPORT") ? atoi(getenv("PGPORT")) : DEF_PGPORT;
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ctx->new.port = getenv("PGPORT") ? atoi(getenv("PGPORT")) : DEF_PGPORT;
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/* must save value, getenv()'s pointer is not stable */
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ctx->transfer_mode = TRANSFER_MODE_COPY;
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/* user lookup and 'root' test must be split because of usage() */
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user_id = get_user_info(ctx, &ctx->user);
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if (argc > 1)
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{
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if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-h") == 0 ||
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strcmp(argv[1], "-?") == 0)
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{
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usage(ctx);
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exit_nicely(ctx, false);
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}
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if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
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{
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pg_log(ctx, PG_REPORT, "pg_upgrade " PG_VERSION "\n");
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exit_nicely(ctx, false);
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}
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}
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if (user_id == 0)
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pg_log(ctx, PG_FATAL, "%s: cannot be run as root\n", ctx->progname);
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#ifndef WIN32
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get_home_path(ctx->home_dir);
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#else
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{
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char *tmppath;
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/* TMP is the best place on Windows, rather than APPDATA */
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if ((tmppath = getenv("TMP")) == NULL)
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pg_log(ctx, PG_FATAL, "TMP environment variable is not set.\n");
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snprintf(ctx->home_dir, MAXPGPATH, "%s", tmppath);
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}
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#endif
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snprintf(ctx->output_dir, MAXPGPATH, "%s/" OUTPUT_SUBDIR, ctx->home_dir);
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while ((option = getopt_long(argc, argv, "d:D:b:B:cgG:kl:p:P:u:v",
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long_options, &optindex)) != -1)
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{
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switch (option)
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{
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case 'd':
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ctx->old.pgdata = pg_strdup(ctx, optarg);
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break;
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case 'D':
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ctx->new.pgdata = pg_strdup(ctx, optarg);
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break;
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case 'b':
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ctx->old.bindir = pg_strdup(ctx, optarg);
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break;
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case 'B':
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ctx->new.bindir = pg_strdup(ctx, optarg);
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break;
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case 'c':
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ctx->check = true;
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break;
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case 'g':
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pg_log(ctx, PG_REPORT, "Running in debug mode\n");
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ctx->debug = true;
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break;
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case 'G':
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if ((ctx->debug_fd = fopen(optarg, "w")) == NULL)
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{
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pg_log(ctx, PG_FATAL, "cannot open debug file\n");
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exit_nicely(ctx, false);
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}
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break;
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case 'k':
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ctx->transfer_mode = TRANSFER_MODE_LINK;
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break;
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case 'l':
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ctx->logfile = pg_strdup(ctx, optarg);
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break;
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case 'p':
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if ((ctx->old.port = atoi(optarg)) <= 0)
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{
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pg_log(ctx, PG_FATAL, "invalid old port number\n");
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exit_nicely(ctx, false);
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}
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break;
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case 'P':
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if ((ctx->new.port = atoi(optarg)) <= 0)
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{
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pg_log(ctx, PG_FATAL, "invalid new port number\n");
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exit_nicely(ctx, false);
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}
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break;
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case 'u':
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pg_free(ctx->user);
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ctx->user = pg_strdup(ctx, optarg);
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break;
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case 'v':
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pg_log(ctx, PG_REPORT, "Running in verbose mode\n");
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ctx->verbose = true;
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break;
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default:
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pg_log(ctx, PG_FATAL,
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"Try \"%s --help\" for more information.\n",
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ctx->progname);
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break;
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}
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}
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if (ctx->logfile != NULL)
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{
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/*
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* We must use append mode so output generated by child processes via
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* ">>" will not be overwritten, and we want the file truncated on
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* start.
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*/
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/* truncate */
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ctx->log_fd = fopen(ctx->logfile, "w");
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if (!ctx->log_fd)
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pg_log(ctx, PG_FATAL, "Cannot write to log file %s\n", ctx->logfile);
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fclose(ctx->log_fd);
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ctx->log_fd = fopen(ctx->logfile, "a");
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if (!ctx->log_fd)
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pg_log(ctx, PG_FATAL, "Cannot write to log file %s\n", ctx->logfile);
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}
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else
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ctx->logfile = strdup(DEVNULL);
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/* if no debug file name, output to the terminal */
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if (ctx->debug && !ctx->debug_fd)
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{
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ctx->debug_fd = fopen(DEVTTY, "w");
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if (!ctx->debug_fd)
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pg_log(ctx, PG_FATAL, "Cannot write to terminal\n");
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}
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/* Get values from env if not already set */
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validateDirectoryOption(ctx, &ctx->old.pgdata, "OLDDATADIR", "-d",
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"old cluster data resides");
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validateDirectoryOption(ctx, &ctx->new.pgdata, "NEWDATADIR", "-D",
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"new cluster data resides");
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validateDirectoryOption(ctx, &ctx->old.bindir, "OLDBINDIR", "-b",
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"old cluster binaries reside");
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validateDirectoryOption(ctx, &ctx->new.bindir, "NEWBINDIR", "-B",
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"new cluster binaries reside");
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get_pkglibdirs(ctx);
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}
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static void
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usage(migratorContext *ctx)
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{
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printf(_("\nUsage: pg_upgrade [OPTIONS]...\n\
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\n\
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Options:\n\
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-b, --old-bindir=old_bindir old cluster executable directory\n\
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-B, --new-bindir=new_bindir new cluster executable directory\n\
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-c, --check check clusters only, don't change any data\n\
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-d, --old-datadir=old_datadir old cluster data directory\n\
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-D, --new-datadir=new_datadir new cluster data directory\n\
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-g, --debug enable debugging\n\
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-G, --debugfile=debug_filename output debugging activity to file\n\
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-k, --link link instead of copying files to new cluster\n\
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-l, --logfile=log_filename log session activity to file\n\
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-p, --old-port=old_portnum old cluster port number (default %d)\n\
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-P, --new-port=new_portnum new cluster port number (default %d)\n\
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-u, --user=username clusters superuser (default \"%s\")\n\
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-v, --verbose enable verbose output\n\
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-V, --version display version information, then exit\n\
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-h, --help show this help, then exit\n\
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\n\
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Before running pg_upgrade you must:\n\
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create a new database cluster (using the new version of initdb)\n\
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shutdown the postmaster servicing the old cluster\n\
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shutdown the postmaster servicing the new cluster\n\
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\n\
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When you run pg_upgrade, you must provide the following information:\n\
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the data directory for the old cluster (-d OLDDATADIR)\n\
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the data directory for the new cluster (-D NEWDATADIR)\n\
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the 'bin' directory for the old version (-b OLDBINDIR)\n\
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the 'bin' directory for the new version (-B NEWBINDIR)\n\
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\n\
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For example:\n\
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pg_upgrade -d oldCluster/data -D newCluster/data -b oldCluster/bin -B newCluster/bin\n\
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or\n"), ctx->old.port, ctx->new.port, ctx->user);
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#ifndef WIN32
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printf(_("\
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$ export OLDDATADIR=oldCluster/data\n\
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$ export NEWDATADIR=newCluster/data\n\
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$ export OLDBINDIR=oldCluster/bin\n\
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$ export NEWBINDIR=newCluster/bin\n\
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$ pg_upgrade\n"));
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#else
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printf(_("\
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C:\\> set OLDDATADIR=oldCluster/data\n\
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C:\\> set NEWDATADIR=newCluster/data\n\
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C:\\> set OLDBINDIR=oldCluster/bin\n\
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C:\\> set NEWBINDIR=newCluster/bin\n\
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C:\\> pg_upgrade\n"));
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#endif
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printf(_("\n\
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You may find it useful to save the preceding 5 commands in a shell script\n\
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\n\
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Report bugs to <pg-migrator-general@lists.pgfoundry.org>\n"));
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}
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/*
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* validateDirectoryOption()
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*
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* Validates a directory option.
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* dirpath - the directory name supplied on the command line
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* envVarName - the name of an environment variable to get if dirpath is NULL
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* cmdLineOption - the command line option corresponds to this directory (-o, -O, -n, -N)
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* description - a description of this directory option
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*
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* We use the last two arguments to construct a meaningful error message if the
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* user hasn't provided the required directory name.
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*/
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static void
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validateDirectoryOption(migratorContext *ctx, char **dirpath,
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char *envVarName, char *cmdLineOption, char *description)
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{
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if (*dirpath == NULL || (strlen(*dirpath) == 0))
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{
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const char *envVar;
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if ((envVar = getenv(envVarName)) && strlen(envVar))
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*dirpath = pg_strdup(ctx, envVar);
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else
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{
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pg_log(ctx, PG_FATAL, "You must identify the directory where the %s\n"
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"Please use the %s command-line option or the %s environment variable\n",
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description, cmdLineOption, envVarName);
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}
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}
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/*
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* Trim off any trailing path separators
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*/
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#ifndef WIN32
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if ((*dirpath)[strlen(*dirpath) - 1] == '/')
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#else
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if ((*dirpath)[strlen(*dirpath) - 1] == '/' ||
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(*dirpath)[strlen(*dirpath) - 1] == '\\')
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#endif
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(*dirpath)[strlen(*dirpath) - 1] = 0;
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}
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static void
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get_pkglibdirs(migratorContext *ctx)
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{
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ctx->old.libpath = get_pkglibdir(ctx, ctx->old.bindir);
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ctx->new.libpath = get_pkglibdir(ctx, ctx->new.bindir);
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}
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static char *
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get_pkglibdir(migratorContext *ctx, const char *bindir)
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{
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char cmd[MAXPGPATH];
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char bufin[MAX_STRING];
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FILE *output;
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int i;
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snprintf(cmd, sizeof(cmd), "\"%s/pg_config\" --pkglibdir", bindir);
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if ((output = popen(cmd, "r")) == NULL)
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pg_log(ctx, PG_FATAL, "Could not get pkglibdir data: %s\n",
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getErrorText(errno));
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fgets(bufin, sizeof(bufin), output);
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if (output)
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pclose(output);
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/* Remove trailing newline */
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i = strlen(bufin) - 1;
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if (bufin[i] == '\n')
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bufin[i] = '\0';
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return pg_strdup(ctx, bufin);
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}
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