257 lines
6.5 KiB
C
257 lines
6.5 KiB
C
#ifndef lint
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static const char rcsid[] =
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"$Id: extract.c,v 1.22 1998/10/12 20:01:48 jkh Exp $";
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#endif
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/*
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* FreeBSD install - a package for the installation and maintainance
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* of non-core utilities.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Jordan K. Hubbard
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* 18 July 1993
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*
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* This is the package extraction code for the add module.
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*
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*/
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#include <err.h>
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#include "lib.h"
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#include "add.h"
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#define STARTSTRING "tar cf - "
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#define TOOBIG(str) ((strlen(str) + 22 + strlen(home) + where_count > maxargs) \
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|| (strlen(str) + 6 + strlen(home) + perm_count > maxargs))
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#define PUSHOUT(todir) /* push out string */ \
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if (where_count > sizeof(STARTSTRING)-1) { \
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strcat(where_args, "|tar --unlink -xf - -C "); \
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strcat(where_args, todir); \
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if (system(where_args)) { \
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cleanup(0); \
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errx(2, "can not invoke %d byte tar pipeline: %s", \
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strlen(where_args), where_args); \
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} \
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strcpy(where_args, STARTSTRING); \
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where_count = sizeof(STARTSTRING)-1; \
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} \
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if (perm_count) { \
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apply_perms(todir, perm_args); \
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perm_args[0] = 0;\
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perm_count = 0; \
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}
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static void
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rollback(char *name, char *home, PackingList start, PackingList stop)
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{
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PackingList q;
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char try[FILENAME_MAX], bup[FILENAME_MAX], *dir;
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dir = home;
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for (q = start; q != stop; q = q->next) {
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if (q->type == PLIST_FILE) {
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snprintf(try, FILENAME_MAX, "%s/%s", dir, q->name);
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if (make_preserve_name(bup, FILENAME_MAX, name, try) && fexists(bup)) {
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(void)chflags(try, 0);
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(void)unlink(try);
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if (rename(bup, try))
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warnx("rollback: unable to rename %s back to %s", bup, try);
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}
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}
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else if (q->type == PLIST_CWD) {
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if (strcmp(q->name, "."))
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dir = q->name;
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else
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dir = home;
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}
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}
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}
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void
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extract_plist(char *home, Package *pkg)
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{
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PackingList p = pkg->head;
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char *last_file;
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char *where_args, *perm_args, *last_chdir;
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int maxargs, where_count = 0, perm_count = 0, add_count;
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Boolean preserve;
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maxargs = sysconf(_SC_ARG_MAX) / 2; /* Just use half the argument space */
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where_args = alloca(maxargs);
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if (!where_args) {
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cleanup(0);
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errx(2, "can't get argument list space");
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}
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perm_args = alloca(maxargs);
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if (!perm_args) {
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cleanup(0);
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errx(2, "can't get argument list space");
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}
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strcpy(where_args, STARTSTRING);
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where_count = sizeof(STARTSTRING)-1;
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perm_args[0] = 0;
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last_chdir = 0;
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preserve = find_plist_option(pkg, "preserve") ? TRUE : FALSE;
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/* Reset the world */
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Owner = NULL;
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Group = NULL;
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Mode = NULL;
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last_file = NULL;
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Directory = home;
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/* Do it */
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while (p) {
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char cmd[FILENAME_MAX];
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switch(p->type) {
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case PLIST_NAME:
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PkgName = p->name;
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if (Verbose)
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printf("extract: Package name is %s\n", p->name);
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break;
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case PLIST_FILE:
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last_file = p->name;
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if (Verbose)
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printf("extract: %s/%s\n", Directory, p->name);
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if (!Fake) {
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char try[FILENAME_MAX];
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if (strrchr(p->name,'\'')) {
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cleanup(0);
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errx(2, "Bogus filename \"%s\"", p->name);
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}
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/* first try to rename it into place */
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snprintf(try, FILENAME_MAX, "%s/%s", Directory, p->name);
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if (fexists(try)) {
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(void)chflags(try, 0); /* XXX hack - if truly immutable, rename fails */
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if (preserve && PkgName) {
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char pf[FILENAME_MAX];
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if (make_preserve_name(pf, FILENAME_MAX, PkgName, try)) {
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if (rename(try, pf)) {
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warnx(
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"unable to back up %s to %s, aborting pkg_add",
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try, pf);
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rollback(PkgName, home, pkg->head, p);
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return;
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}
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}
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}
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}
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if (rename(p->name, try) == 0) {
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/* try to add to list of perms to be changed and run in bulk. */
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if (p->name[0] == '/' || TOOBIG(p->name)) {
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PUSHOUT(Directory);
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}
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add_count = snprintf(&perm_args[perm_count], maxargs - perm_count, "'%s' ", p->name);
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if (add_count > maxargs - perm_count) {
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cleanup(0);
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errx(2, "oops, miscounted strings!");
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}
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perm_count += add_count;
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}
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else {
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/* rename failed, try copying with a big tar command */
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if (last_chdir != Directory) {
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if (last_chdir == NULL) {
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PUSHOUT(Directory);
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} else {
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PUSHOUT(last_chdir);
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}
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last_chdir = Directory;
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}
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else if (p->name[0] == '/' || TOOBIG(p->name)) {
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PUSHOUT(Directory);
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}
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add_count = snprintf(&where_args[where_count], maxargs - where_count, " '%s'", p->name);
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if (add_count > maxargs - where_count) {
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cleanup(0);
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errx(2, "oops, miscounted strings!");
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}
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where_count += add_count;
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add_count = snprintf(&perm_args[perm_count],
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maxargs - perm_count,
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"'%s' ", p->name);
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if (add_count > maxargs - perm_count) {
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cleanup(0);
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errx(2, "oops, miscounted strings!");
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}
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perm_count += add_count;
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}
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}
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break;
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case PLIST_CWD:
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if (Verbose)
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printf("extract: CWD to %s\n", p->name);
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PUSHOUT(Directory);
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if (strcmp(p->name, ".")) {
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if (!Fake && make_hierarchy(p->name) == FAIL) {
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cleanup(0);
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errx(2, "unable to cwd to '%s'", p->name);
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}
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Directory = p->name;
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}
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else
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Directory = home;
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break;
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case PLIST_CMD:
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if ((strstr(p->name, "%B") || strstr(p->name, "%F") ||
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strstr(p->name, "%f")) && last_file == NULL) {
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cleanup(0);
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errx(2, "no last file specified for '%s' command", p->name);
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}
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if (strstr(p->name, "%D") && Directory == NULL) {
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cleanup(0);
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errx(2, "no directory specified for '%s' command", p->name);
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}
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format_cmd(cmd, p->name, Directory, last_file);
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PUSHOUT(Directory);
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if (Verbose)
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printf("extract: execute '%s'\n", cmd);
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if (!Fake && system(cmd))
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warnx("command '%s' failed", cmd);
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break;
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case PLIST_CHMOD:
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PUSHOUT(Directory);
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Mode = p->name;
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break;
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case PLIST_CHOWN:
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PUSHOUT(Directory);
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Owner = p->name;
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break;
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case PLIST_CHGRP:
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PUSHOUT(Directory);
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Group = p->name;
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break;
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case PLIST_COMMENT:
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break;
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case PLIST_IGNORE:
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p = p->next;
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break;
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}
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p = p->next;
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}
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PUSHOUT(Directory);
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}
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