762c7db2e8
- Rework the wrapper support to check libpkg version as well as pkg_install version. - Add libfetch to _prebuild_libs. - There are no new features introduced. Notes: the API is not stable, so basically, do not use libpkg in your projects for now. Also there's no manpage for libpkg yet, because the API will change drastically. I repeat, do not use libpkg for now.
242 lines
6.5 KiB
C
242 lines
6.5 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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* Maxim Sobolev
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* 14 March 2001
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*
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* Routines used to do various operations with dependencies
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* among installed packages.
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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 "pkg.h"
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#include <err.h>
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#include <stdio.h>
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void list_deps(const char *pkgname, char **pkgs, char *listed,
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char *check_loop, char **newpkgs, int *nrnewpkgs,
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int *err_cnt);
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/*
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* Sort given NULL-terminated list of installed packages (pkgs) in
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* such a way that if package A depends on package B then after
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* sorting A will be listed before B no matter how they were
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* originally positioned in the list.
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*
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* Works by performing a recursive depth-first search on the
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* required-by lists.
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*/
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int
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sortdeps(char **pkgs)
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{
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int i, err_cnt=0;
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int nrpkgs, nrnewpkgs;
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char *listed, *check_loop, **newpkgs;
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char *cp;
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if (pkgs[0] == NULL || pkgs[1] == NULL)
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return (0);
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nrpkgs = 0;
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while (pkgs[nrpkgs]) nrpkgs++;
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listed = alloca(nrpkgs);
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if (listed == NULL) {
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warnx("%s(): alloca() failed", __func__);
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return 1;
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}
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bzero(listed,nrpkgs);
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check_loop = alloca(nrpkgs);
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if (check_loop == NULL) {
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warnx("%s(): alloca() failed", __func__);
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return 1;
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}
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bzero(check_loop,nrpkgs);
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newpkgs = alloca(nrpkgs*sizeof(char*));
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if (newpkgs == NULL) {
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warnx("%s(): alloca() failed", __func__);
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return 1;
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}
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nrnewpkgs = 0;
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for (i = 0; pkgs[i]; i++) if (!listed[i]) {
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check_loop[i] = 1;
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cp = strchr(pkgs[i], ':');
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if (cp != NULL)
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*cp = '\0';
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list_deps(pkgs[i],pkgs,listed,check_loop,newpkgs,&nrnewpkgs,&err_cnt);
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if (cp != NULL)
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*cp = ':';
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listed[i] = 1;
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newpkgs[nrnewpkgs] = pkgs[i];
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nrnewpkgs++;
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}
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if (nrnewpkgs != nrpkgs) {
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fprintf(stderr,"This shouldn't happen, and indicates a huge error in the code.\n");
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exit(1);
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}
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for (i = 0; i < nrnewpkgs; i++) pkgs[i] = newpkgs[i];
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return err_cnt;
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}
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/*
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* This recursive function lists the dependencies (that is, the
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* "required-by"s) for pkgname, putting them into newpkgs.
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*/
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void list_deps(const char *pkgname, char **pkgs, char *listed,
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char *check_loop, char **newpkgs, int *nrnewpkgs,
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int *err_cnt) {
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char **rb, **rbtmp;
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char *cp;
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int errcode, i, j;
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struct reqr_by_entry *rb_entry;
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struct reqr_by_head *rb_list;
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if (isinstalledpkg(pkgname) <= 0)
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return;
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errcode = requiredby(pkgname, &rb_list, FALSE, TRUE);
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if (errcode < 0)
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return;
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/*
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* We put rb_list into an argv style NULL terminated list,
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* because requiredby uses some static storage, and list_deps
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* is a recursive function.
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*/
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rbtmp = rb = alloca((errcode + 1) * sizeof(*rb));
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if (rb == NULL) {
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warnx("%s(): alloca() failed", __func__);
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(*err_cnt)++;
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return;
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}
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STAILQ_FOREACH(rb_entry, rb_list, link) {
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*rbtmp = alloca(strlen(rb_entry->pkgname) + 1);
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if (*rbtmp == NULL) {
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warnx("%s(): alloca() failed", __func__);
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(*err_cnt)++;
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return;
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}
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strcpy(*rbtmp, rb_entry->pkgname);
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rbtmp++;
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}
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*rbtmp = NULL;
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for (i = 0; rb[i]; i++)
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for (j = 0; pkgs[j]; j++) if (!listed[j]) {
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cp = strchr(pkgs[j], ':');
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if (cp != NULL)
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*cp = '\0';
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if (strcmp(rb[i], pkgs[j]) == 0) { /*match */
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/*
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* Try to avoid deadlock if package A depends on B which in
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* turn depends on C and C due to an error depends on A.
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* It Should Never Happen[tm] in real life.
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*/
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if (check_loop[j]) {
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warnx("dependency loop detected for package %s", pkgs[j]);
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(*err_cnt)++;
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}
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else {
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check_loop[j] = 1;
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list_deps(pkgs[j],pkgs,listed,check_loop,newpkgs,nrnewpkgs,err_cnt);
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listed[j] = 1;
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newpkgs[*nrnewpkgs] = pkgs[j];
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(*nrnewpkgs)++;
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}
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}
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if (cp != NULL)
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*cp = ':';
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}
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}
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/*
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* Load +REQUIRED_BY file and return a list with names of
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* packages that require package reffered to by `pkgname'.
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*
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* Optionally check that packages listed there are actually
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* installed and filter out those that don't (filter == TRUE).
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*
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* strict argument controls whether the caller want warnings
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* to be emitted when there are some non-fatal conditions,
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* i.e. package doesn't have +REQUIRED_BY file or some packages
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* listed in +REQUIRED_BY don't exist.
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*
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* Result returned in the **list, while return value is equal
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* to the number of entries in the resulting list. Print error
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* message and return -1 on error.
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*/
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int
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requiredby(const char *pkgname, struct reqr_by_head **list, Boolean strict, Boolean filter)
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{
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FILE *fp;
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char fbuf[FILENAME_MAX], fname[FILENAME_MAX];
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int retval;
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struct reqr_by_entry *rb_entry;
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static struct reqr_by_head rb_list = STAILQ_HEAD_INITIALIZER(rb_list);
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*list = &rb_list;
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/* Deallocate any previously allocated space */
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while (!STAILQ_EMPTY(&rb_list)) {
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rb_entry = STAILQ_FIRST(&rb_list);
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STAILQ_REMOVE_HEAD(&rb_list, link);
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free(rb_entry);
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}
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if (isinstalledpkg(pkgname) <= 0) {
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if (strict == TRUE)
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warnx("no such package '%s' installed", pkgname);
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return -1;
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}
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snprintf(fname, sizeof(fname), "%s/%s/%s", LOG_DIR, pkgname,
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REQUIRED_BY_FNAME);
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fp = fopen(fname, "r");
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if (fp == NULL) {
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/* Probably pkgname doesn't have any packages that depend on it */
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if (strict == TRUE)
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warnx("couldn't open dependency file '%s'", fname);
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return 0;
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}
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retval = 0;
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while (fgets(fbuf, sizeof(fbuf), fp) != NULL) {
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if (fbuf[strlen(fbuf) - 1] == '\n')
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fbuf[strlen(fbuf) - 1] = '\0';
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if (filter == TRUE && isinstalledpkg(fbuf) <= 0) {
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if (strict == TRUE)
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warnx("package '%s' is recorded in the '%s' but isn't "
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"actually installed", fbuf, fname);
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continue;
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}
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retval++;
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rb_entry = malloc(sizeof(*rb_entry));
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if (rb_entry == NULL) {
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warnx("%s(): malloc() failed", __func__);
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retval = -1;
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break;
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}
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strlcpy(rb_entry->pkgname, fbuf, sizeof(rb_entry->pkgname));
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STAILQ_INSERT_TAIL(&rb_list, rb_entry, link);
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}
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fclose(fp);
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return retval;
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}
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