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Diffstat (limited to '')
| -rw-r--r-- | src/help.c | 356 |
1 files changed, 356 insertions, 0 deletions
diff --git a/src/help.c b/src/help.c new file mode 100644 index 0000000..382b363 --- /dev/null +++ b/src/help.c @@ -0,0 +1,356 @@ +/* + * dpkg - main program for package management + * help.c - various helper routines + * + * Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk> + * Copyright © 2007-2015 Guillem Jover <guillem@debian.org> + * + * This is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include <config.h> +#include <compat.h> + +#include <sys/types.h> +#include <sys/stat.h> + +#include <errno.h> +#include <string.h> +#include <unistd.h> +#include <stdlib.h> + +#include <dpkg/i18n.h> +#include <dpkg/dpkg.h> +#include <dpkg/dpkg-db.h> +#include <dpkg/path.h> +#include <dpkg/db-fsys.h> + +#include "main.h" + +const char *const statusstrings[]= { + [PKG_STAT_NOTINSTALLED] = N_("not installed"), + [PKG_STAT_CONFIGFILES] = N_("not installed but configs remain"), + [PKG_STAT_HALFINSTALLED] = N_("broken due to failed removal or installation"), + [PKG_STAT_UNPACKED] = N_("unpacked but not configured"), + [PKG_STAT_HALFCONFIGURED] = N_("broken due to postinst failure"), + [PKG_STAT_TRIGGERSAWAITED] = N_("awaiting trigger processing by another package"), + [PKG_STAT_TRIGGERSPENDING] = N_("triggered"), + [PKG_STAT_INSTALLED] = N_("installed") +}; + +struct fsys_namenode * +namenodetouse(struct fsys_namenode *namenode, struct pkginfo *pkg, + struct pkgbin *pkgbin) +{ + struct fsys_namenode *fnn; + + if (!namenode->divert) + return namenode; + + debug(dbg_eachfile, "namenodetouse namenode='%s' pkg=%s", + namenode->name, pkgbin_name(pkg, pkgbin, pnaw_always)); + + fnn = (namenode->divert->useinstead && namenode->divert->pkgset != pkg->set) + ? namenode->divert->useinstead : namenode; + + debug(dbg_eachfile, + "namenodetouse ... useinstead=%s camefrom=%s pkg=%s return %s", + namenode->divert->useinstead ? namenode->divert->useinstead->name : "<none>", + namenode->divert->camefrom ? namenode->divert->camefrom->name : "<none>", + namenode->divert->pkgset ? namenode->divert->pkgset->name : "<none>", + fnn->name); + + return fnn; +} + +bool +find_command(const char *prog) +{ + struct varbuf filename = VARBUF_INIT; + struct stat stab; + const char *path_list; + const char *path, *path_end; + size_t path_len; + + path_list = getenv("PATH"); + if (!path_list) + ohshit(_("PATH is not set")); + + for (path = path_list; path; path = *path_end ? path_end + 1 : NULL) { + path_end = strchrnul(path, ':'); + path_len = (size_t)(path_end - path); + + varbuf_reset(&filename); + varbuf_add_buf(&filename, path, path_len); + if (path_len) + varbuf_add_char(&filename, '/'); + varbuf_add_str(&filename, prog); + varbuf_end_str(&filename); + + if (stat(filename.buf, &stab) == 0 && (stab.st_mode & 0111)) { + varbuf_destroy(&filename); + return true; + } + } + + varbuf_destroy(&filename); + return false; +} + +/** + * Verify that some programs can be found in the PATH. + */ +void checkpath(void) { + static const char *const prog_list[] = { + DEFAULTSHELL, + RM, + TAR, + DIFF, + BACKEND, + /* Mac OS X uses dyld (Mach-O) instead of ld.so (ELF), and does not have + * an ldconfig. */ +#if defined(__APPLE__) && defined(__MACH__) + "update_dyld_shared_cache", +#elif defined(__GLIBC__) || defined(__UCLIBC__) || \ + defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) + "ldconfig", +#endif +#if BUILD_START_STOP_DAEMON + "start-stop-daemon", +#endif + NULL + }; + + const char *const *prog; + int warned= 0; + + for (prog = prog_list; *prog; prog++) { + if (!find_command(*prog)) { + warning(_("'%s' not found in PATH or not executable"), *prog); + warned++; + } + } + + if (warned) + forcibleerr(FORCE_BAD_PATH, + P_("%d expected program not found in PATH or not executable\n%s", + "%d expected programs not found in PATH or not executable\n%s", + warned), + warned, _("Note: root's PATH should usually contain " + "/usr/local/sbin, /usr/sbin and /sbin")); +} + +bool +ignore_depends(struct pkginfo *pkg) +{ + struct pkg_list *id; + for (id= ignoredependss; id; id= id->next) + if (id->pkg == pkg) + return true; + return false; +} + +static bool +ignore_depends_possi(struct deppossi *possi) +{ + struct deppossi_pkg_iterator *possi_iter; + struct pkginfo *pkg; + + possi_iter = deppossi_pkg_iter_new(possi, wpb_installed); + while ((pkg = deppossi_pkg_iter_next(possi_iter))) { + if (ignore_depends(pkg)) { + deppossi_pkg_iter_free(possi_iter); + return true; + } + } + deppossi_pkg_iter_free(possi_iter); + + return false; +} + +bool +force_depends(struct deppossi *possi) +{ + return in_force(FORCE_DEPENDS) || + ignore_depends_possi(possi) || + ignore_depends(possi->up->up); +} + +bool +force_breaks(struct deppossi *possi) +{ + return in_force(FORCE_BREAKS) || + ignore_depends_possi(possi) || + ignore_depends(possi->up->up); +} + +bool +force_conflicts(struct deppossi *possi) +{ + return in_force(FORCE_CONFLICTS); +} + +void clear_istobes(void) { + struct pkg_hash_iter *iter; + struct pkginfo *pkg; + + iter = pkg_hash_iter_new(); + while ((pkg = pkg_hash_iter_next_pkg(iter)) != NULL) { + ensure_package_clientdata(pkg); + pkg->clientdata->istobe = PKG_ISTOBE_NORMAL; + pkg->clientdata->replacingfilesandsaid= 0; + } + pkg_hash_iter_free(iter); +} + +/* + * Returns true if the directory contains conffiles belonging to pkg, + * false otherwise. + */ +bool +dir_has_conffiles(struct fsys_namenode *file, struct pkginfo *pkg) +{ + struct conffile *conff; + size_t namelen; + + debug(dbg_veryverbose, "dir_has_conffiles '%s' (from %s)", file->name, + pkg_name(pkg, pnaw_always)); + namelen = strlen(file->name); + for (conff= pkg->installed.conffiles; conff; conff= conff->next) { + if (conff->obsolete) + continue; + if (strncmp(file->name, conff->name, namelen) == 0 && + strlen(conff->name) > namelen && conff->name[namelen] == '/') { + debug(dbg_veryverbose, "directory %s has conffile %s from %s", + file->name, conff->name, pkg_name(pkg, pnaw_always)); + return true; + } + } + debug(dbg_veryverbose, "dir_has_conffiles no"); + return false; +} + +/* + * Returns true if the file is used by packages other than pkg, + * false otherwise. + */ +bool +dir_is_used_by_others(struct fsys_namenode *file, struct pkginfo *pkg) +{ + struct fsys_node_pkgs_iter *iter; + struct pkginfo *other_pkg; + + debug(dbg_veryverbose, "dir_is_used_by_others '%s' (except %s)", file->name, + pkg ? pkg_name(pkg, pnaw_always) : "<none>"); + + iter = fsys_node_pkgs_iter_new(file); + while ((other_pkg = fsys_node_pkgs_iter_next(iter))) { + debug(dbg_veryverbose, "dir_is_used_by_others considering %s ...", + pkg_name(other_pkg, pnaw_always)); + if (other_pkg == pkg) + continue; + + fsys_node_pkgs_iter_free(iter); + debug(dbg_veryverbose, "dir_is_used_by_others yes"); + return true; + } + fsys_node_pkgs_iter_free(iter); + + debug(dbg_veryverbose, "dir_is_used_by_others no"); + return false; +} + +/* + * Returns true if the file is used by pkg, false otherwise. + */ +bool +dir_is_used_by_pkg(struct fsys_namenode *file, struct pkginfo *pkg, + struct fsys_namenode_list *list) +{ + struct fsys_namenode_list *node; + size_t namelen; + + debug(dbg_veryverbose, "dir_is_used_by_pkg '%s' (by %s)", + file->name, pkg ? pkg_name(pkg, pnaw_always) : "<none>"); + + namelen = strlen(file->name); + + for (node = list; node; node = node->next) { + debug(dbg_veryverbose, "dir_is_used_by_pkg considering %s ...", + node->namenode->name); + + if (strncmp(file->name, node->namenode->name, namelen) == 0 && + strlen(node->namenode->name) > namelen && + node->namenode->name[namelen] == '/') { + debug(dbg_veryverbose, "dir_is_used_by_pkg yes"); + return true; + } + } + + debug(dbg_veryverbose, "dir_is_used_by_pkg no"); + + return false; +} + +/** + * Mark a conffile as obsolete. + * + * @param pkg The package owning the conffile. + * @param namenode The namenode for the obsolete conffile. + */ +void +conffile_mark_obsolete(struct pkginfo *pkg, struct fsys_namenode *namenode) +{ + struct conffile *conff; + + for (conff = pkg->installed.conffiles; conff; conff = conff->next) { + if (strcmp(conff->name, namenode->name) == 0) { + debug(dbg_conff, "marking %s conffile %s as obsolete", + pkg_name(pkg, pnaw_always), conff->name); + conff->obsolete = true; + return; + } + } +} + +/** + * Mark all package conffiles as old. + * + * @param pkg The package owning the conffiles. + */ +void +pkg_conffiles_mark_old(struct pkginfo *pkg) +{ + const struct conffile *conff; + struct fsys_namenode *namenode; + + for (conff = pkg->installed.conffiles; conff; conff = conff->next) { + namenode = fsys_hash_find_node(conff->name, 0); /* XXX */ + namenode->flags |= FNNF_OLD_CONFF; + if (!namenode->oldhash) + namenode->oldhash = conff->hash; + debug(dbg_conffdetail, "%s '%s' namenode '%s' flags %o", __func__, + conff->name, namenode->name, namenode->flags); + } +} + +void +log_action(const char *action, struct pkginfo *pkg, struct pkgbin *pkgbin) +{ + log_message("%s %s %s %s", action, pkgbin_name(pkg, pkgbin, pnaw_always), + versiondescribe(&pkg->installed.version, vdew_nonambig), + versiondescribe(&pkg->available.version, vdew_nonambig)); + statusfd_send("processing: %s: %s", action, + pkgbin_name(pkg, pkgbin, pnaw_nonambig)); +} |