NetBSD/usr.sbin/pkg_install/add/extract.c

340 lines
9.1 KiB
C

/* $NetBSD: extract.c,v 1.23 2001/09/26 13:48:27 hubertf Exp $ */
#include <sys/cdefs.h>
#ifndef lint
#if 0
static const char *rcsid = "FreeBSD - Id: extract.c,v 1.17 1997/10/08 07:45:35 charnier Exp";
#else
__RCSID("$NetBSD: extract.c,v 1.23 2001/09/26 13:48:27 hubertf Exp $");
#endif
#endif
/*
* FreeBSD install - a package for the installation and maintainance
* of non-core utilities.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Jordan K. Hubbard
* 18 July 1993
*
* This is the package extraction code for the add module.
*
*/
#include <err.h>
#include "lib.h"
#include "add.h"
#define TAR_ARGS " cf - "
#define TARX_CMD "|" TAR_FULLPATHNAME " xf - -C "
/*
* This macro is used to determine if the 'where_args' buffer is big enough to add the
* current string (usually a filename) plus some extra commands (the contents of TARX_CMD, and
* the directory name stored in 'Directory').
*
* The string " 'str'" will be added so we need room for the string plus 3 chars plus the other arguments.
*
* In addition, we will add " 'srt'" to the perm_args buffer so we need to ensure that there is room
* for that.
*/
#define TOOBIG(str) ((strlen(str) + 3 + strlen(TARX_CMD) + strlen(Directory) + where_count >= maxargs) \
|| (strlen(str) + 3 + perm_count >= maxargs))
#define PUSHOUT(todir) /* push out string */ \
if (where_count > sizeof(TAR_FULLPATHNAME) + sizeof(TAR_ARGS)-1) { \
strcat(where_args, TARX_CMD); \
strcat(where_args, todir); \
if (system(where_args)) { \
cleanup(0); \
errx(2, "can not invoke %lu byte %s pipeline: %s", \
(u_long)strlen(where_args), TAR_FULLPATHNAME, \
where_args); \
} \
strcpy(where_args, TAR_FULLPATHNAME TAR_ARGS); \
where_count = strlen(where_args); \
} \
if (perm_count) { \
apply_perms(todir, perm_args); \
perm_args[0] = 0; \
perm_count = 0; \
}
static void
rollback(char *name, char *home, plist_t *start, plist_t *stop)
{
plist_t *q;
char try[FILENAME_MAX], bup[FILENAME_MAX], *dir;
dir = home;
for (q = start; q != stop; q = q->next) {
if (q->type == PLIST_FILE) {
(void) snprintf(try, sizeof(try), "%s/%s", dir, q->name);
if (make_preserve_name(bup, sizeof(bup), name, try) && fexists(bup)) {
(void) chflags(try, 0);
(void) unlink(try);
if (rename(bup, try))
warnx("rollback: unable to rename %s back to %s", bup, try);
}
} else if (q->type == PLIST_CWD) {
if (strcmp(q->name, "."))
dir = q->name;
else
dir = home;
}
}
}
/*
* Return 0 on error, 1 for success.
*/
int
extract_plist(char *home, package_t *pkg)
{
plist_t *p = pkg->head;
char *last_file;
char *where_args, *perm_args, *last_chdir;
int maxargs, where_count = 0, perm_count = 0, add_count;
Boolean preserve;
maxargs = sysconf(_SC_ARG_MAX) / 2; /* Just use half the argument space */
where_args = alloca(maxargs);
if (!where_args) {
cleanup(0);
errx(2, "can't get argument list space");
}
perm_args = alloca(maxargs);
if (!perm_args) {
cleanup(0);
errx(2, "can't get argument list space");
}
strcpy(where_args, TAR_FULLPATHNAME TAR_ARGS);
/*
* we keep track of how many characters are stored in 'where_args' with 'where_count'.
* Note this doesn't include the trailing null character.
*/
where_count = strlen(where_args);
perm_args[0] = 0;
/*
* we keep track of how many characters are stored in 'perm__args' with 'perm_count'.
* Note this doesn't include the trailing null character.
*/
perm_count = 0;
last_chdir = 0;
preserve = find_plist_option(pkg, "preserve") ? TRUE : FALSE;
/* Reset the world */
Owner = NULL;
Group = NULL;
Mode = NULL;
last_file = NULL;
Directory = home;
/* Open Package Database for writing */
if (pkgdb_open(0) == -1) {
cleanup(0);
err(1, "can't open pkgdb");
}
/* Do it */
while (p) {
char cmd[FILENAME_MAX];
switch (p->type) {
case PLIST_NAME:
PkgName = p->name;
if (Verbose)
printf("extract: Package name is %s\n", p->name);
break;
case PLIST_FILE:
last_file = p->name;
if (Verbose)
printf("extract: %s/%s\n", Directory, p->name);
if (!Fake) {
char try[FILENAME_MAX];
if (strrchr(p->name, '\'')) {
cleanup(0);
errx(2, "Bogus filename \"%s\"", p->name);
}
/* first try to rename it into place */
(void) snprintf(try, sizeof(try), "%s/%s", Directory, p->name);
if (fexists(try)) {
(void) chflags(try, 0); /* XXX hack - if truly immutable, rename fails */
if (preserve && PkgName) {
char pf[FILENAME_MAX];
if (make_preserve_name(pf, sizeof(pf), PkgName, try)) {
if (rename(try, pf)) {
warnx(
"unable to back up %s to %s, aborting pkg_add",
try, pf);
rollback(PkgName, home, pkg->head, p);
return 0;
}
}
}
}
if (rename(p->name, try) == 0) {
/* note in pkgdb */
{
char *s, t[FILENAME_MAX];
int rc;
(void) snprintf(t, sizeof(t), "%s/%s", Directory, p->name);
s = pkgdb_retrieve(t);
#ifdef PKGDB_DEBUG
printf("pkgdb_retrieve(\"%s\")=\"%s\"\n", t, s); /* pkgdb-debug - HF */
#endif
if (s)
warnx("Overwriting %s - pkg %s bogus/conflicting?", t, s);
else {
rc = pkgdb_store(t, PkgName);
#ifdef PKGDB_DEBUG
printf("pkgdb_store(\"%s\", \"%s\") = %d\n", t, PkgName, rc); /* pkgdb-debug - HF */
#endif
}
}
/* try to add to list of perms to be changed and run in bulk. */
if (p->name[0] == '/' || TOOBIG(p->name)) {
PUSHOUT(Directory);
}
/* note, if the following line is modified, TOOBIG must be adjusted accordingly */
add_count = snprintf(&perm_args[perm_count], maxargs - perm_count, "'%s' ", p->name);
if (add_count > maxargs - perm_count) {
cleanup(0);
errx(2, "oops, miscounted strings!");
}
perm_count += add_count;
} else {
/* rename failed, try copying with a big tar command */
if (last_chdir != Directory) {
PUSHOUT(last_chdir);
last_chdir = Directory;
} else if (p->name[0] == '/' || TOOBIG(p->name)) {
PUSHOUT(Directory);
}
/* note, if the following line is modified, TOOBIG must be adjusted accordingly */
add_count = snprintf(&where_args[where_count], maxargs - where_count, " '%s'", p->name);
if (add_count > maxargs - where_count) {
cleanup(0);
errx(2, "oops, miscounted strings!");
}
where_count += add_count;
/* note, if the following line is modified, TOOBIG must be adjusted accordingly */
add_count = snprintf(&perm_args[perm_count],
maxargs - perm_count,
"'%s' ", p->name);
if (add_count > maxargs - perm_count) {
cleanup(0);
errx(2, "oops, miscounted strings!");
}
perm_count += add_count;
/* note in pkgdb */
/* XXX would be better to store in PUSHOUT, but
* that would probably affect too much code I prefer
* not to touch - HF */
{
char *s, t[FILENAME_MAX], *u;
int rc;
if (p->name[0] == '/')
u = p->name;
else {
(void) snprintf(t, sizeof(t), "%s/%s", Directory, p->name);
u = t;
}
s = pkgdb_retrieve(t);
#ifdef PKGDB_DEBUG
printf("pkgdb_retrieve(\"%s\")=\"%s\"\n", t, s); /* pkgdb-debug - HF */
#endif
if (s)
warnx("Overwriting %s - pkg %s bogus/conflicting?", t, s);
else {
rc = pkgdb_store(t, PkgName);
#ifdef PKGDB_DEBUG
printf("pkgdb_store(\"%s\", \"%s\") = %d\n", t, PkgName, rc); /* pkgdb-debug - HF */
#endif
}
}
}
}
break;
case PLIST_CWD:
if (Verbose)
printf("extract: CWD to %s\n", p->name);
PUSHOUT(Directory);
if (strcmp(p->name, ".")) {
if (!Fake && make_hierarchy(p->name) == FAIL) {
cleanup(0);
errx(2, "unable to make directory '%s'", p->name);
}
Directory = p->name;
} else
Directory = home;
break;
case PLIST_CMD:
if (last_file == NULL && strchr(p->name, '%') != NULL) {
cleanup(0);
errx(2, "no last file specified for '%s' command", p->name);
}
format_cmd(cmd, sizeof(cmd), p->name, Directory, last_file);
PUSHOUT(Directory);
if (Verbose)
printf("extract: execute '%s'\n", cmd);
if (!Fake && system(cmd))
warnx("command '%s' failed", cmd);
break;
case PLIST_CHMOD:
PUSHOUT(Directory);
Mode = p->name;
break;
case PLIST_CHOWN:
PUSHOUT(Directory);
Owner = p->name;
break;
case PLIST_CHGRP:
PUSHOUT(Directory);
Group = p->name;
break;
case PLIST_COMMENT:
break;
case PLIST_IGNORE:
p = p->next;
break;
default:
break;
}
p = p->next;
}
PUSHOUT(Directory);
pkgdb_close();
return 1;
}