278 lines
7.0 KiB
C
278 lines
7.0 KiB
C
/*
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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 <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <ctype.h>
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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) \
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(((int)strlen(str) + FILENAME_MAX + where_count > maxargs) ||\
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((int)strlen(str) + FILENAME_MAX + perm_count > maxargs))
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#define PUSHOUT(todir) /* push out string */ \
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if (where_count > (int)sizeof(STARTSTRING)-1) { \
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strcat(where_args, "|tar --unlink -xpf - -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, "%s: can not invoke %ld byte tar pipeline: %s", \
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__func__, (long)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(const char *name, const 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];
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const char *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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#define add_char(buf, len, pos, ch) do {\
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if ((pos) < (len)) { \
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buf[(pos)] = (ch); \
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buf[(pos) + 1] = '\0'; \
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} \
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++(pos); \
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} while (0)
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int
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add_arg(char *buf, int len, const char *str)
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{
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int i = 0;
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add_char(buf, len, i, ' ');
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for (; *str != '\0'; ++str) {
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if (!isalnum(*str) && *str != '/' && *str != '.' && *str != '-')
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add_char(buf, len, i, '\\');
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add_char(buf, len, i, *str);
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}
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return (i);
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}
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void
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extract_plist(const 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, "%s: can't get argument list space", __func__);
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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, "%s: can't get argument list space", __func__);
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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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(const char *)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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/* 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 = add_arg(&perm_args[perm_count], maxargs - perm_count, p->name);
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if (add_count < 0 || add_count >= maxargs - perm_count) {
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cleanup(0);
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errx(2, "%s: oops, miscounted strings!", __func__);
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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 = add_arg(&where_args[where_count], maxargs - where_count, p->name);
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if (add_count < 0 || add_count >= maxargs - where_count) {
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cleanup(0);
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errx(2, "%s: oops, miscounted strings!", __func__);
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}
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where_count += add_count;
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add_count = add_arg(&perm_args[perm_count], maxargs - perm_count, p->name);
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if (add_count < 0 || add_count >= maxargs - perm_count) {
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cleanup(0);
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errx(2, "%s: oops, miscounted strings!", __func__);
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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, "%s: unable to cwd to '%s'", __func__, 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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(const char *)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, "%s: no last file specified for '%s' command",
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__func__, 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, "%s: no directory specified for '%s' command",
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__func__, p->name);
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}
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format_cmd(cmd, FILENAME_MAX, 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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default:
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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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