Initial import
diff --git a/dpkg.c b/dpkg.c
new file mode 100644
index 0000000..9519eeb
--- /dev/null
+++ b/dpkg.c
@@ -0,0 +1,905 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <search.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "busybox.h"
+
+//#define PACKAGE "udpkg"
+//#define VERSION "0.1"
+
+/*
+ * Should we do full dependency checking?
+ */
+#define DODEPENDS 1
+
+/*
+ * Should we do debugging?
+ */
+#define DODEBUG 0
+
+#ifdef DODEBUG
+#include <assert.h>
+#define ASSERT(x) assert(x)
+#define SYSTEM(x) do_system(x)
+#define DPRINTF(fmt,args...) fprintf(stderr, fmt, ##args)
+#else
+#define ASSERT(x) /* nothing */
+#define SYSTEM(x) system(x)
+#define DPRINTF(fmt,args...) /* nothing */
+#endif
+
+#define BUFSIZE 4096
+#define ADMINDIR "/var/lib/dpkg"
+#define STATUSFILE ADMINDIR ## "/status"
+#define DPKGCIDIR ADMINDIR ## "/tmp.ci/"
+#define INFODIR ADMINDIR ## "/info/"
+#define UDPKG_QUIET "UDPKG_QUIET"
+#define DEPENDSMAX 64 /* maximum number of depends we can handle */
+
+#define STATUS_WANTSTART (0)
+#define STATUS_WANTUNKNOWN (1 << 0)
+#define STATUS_WANTINSTALL (1 << 1)
+#define STATUS_WANTHOLD (1 << 2)
+#define STATUS_WANTDEINSTALL (1 << 3)
+#define STATUS_WANTPURGE (1 << 4)
+#define STATUS_WANTMASK ~(STATUS_WANTUNKNOWN | STATUS_WANTINSTALL | STATUS_WANTHOLD | STATUS_WANTDEINSTALL | STATUS_WANTPURGE)
+
+#define STATUS_FLAGSTART (5)
+#define STATUS_FLAGOK (1 << 5)
+#define STATUS_FLAGREINSTREQ (1 << 6)
+#define STATUS_FLAGHOLD (1 << 7)
+#define STATUS_FLAGHOLDREINSTREQ (1 << 8)
+#define STATUS_FLAGMASK ~(STATUS_FLAGOK | STATUS_FLAGREINSTREQ | STATUS_FLAGHOLD | STATUS_FLAGHOLDREINSTREQ)
+
+#define STATUS_STATUSSTART (9)
+#define STATUS_STATUSNOTINSTALLED (1 << 9)
+#define STATUS_STATUSUNPACKED (1 << 10)
+#define STATUS_STATUSHALFCONFIGURED (1 << 11)
+#define STATUS_STATUSINSTALLED (1 << 12)
+#define STATUS_STATUSHALFINSTALLED (1 << 13)
+#define STATUS_STATUSCONFIGFILES (1 << 14)
+#define STATUS_STATUSPOSTINSTFAILED (1 << 15)
+#define STATUS_STATUSREMOVALFAILED (1 << 16)
+#define STATUS_STATUSMASK ~(STATUS_STATUSNOTINSTALLED | STATUS_STATUSUNPACKED | STATUS_STATUSHALFCONFIGURED | STATUS_STATUSCONFIGFILES | STATUS_STATUSPOSTINSTFAILED | STATUS_STATUSREMOVALFAILED | STATUS_STATUSHALFINSTALLED)
+
+#define COLOR_WHITE 0
+#define COLOR_GRAY 1
+#define COLOR_BLACK 2
+
+/* data structures */
+struct package_t {
+ char *file;
+ char *package;
+ char *version;
+ char *depends;
+ char *provides;
+ char *description;
+ int installer_menu_item;
+ unsigned long status;
+ char color; /* for topo-sort */
+ struct package_t *requiredfor[DEPENDSMAX];
+ unsigned short requiredcount;
+ struct package_t *next;
+};
+
+/* function prototypes */
+void *status_read(void);
+void control_read(FILE *f, struct package_t *p);
+int status_merge(void *status, struct package_t *pkgs);
+int package_compare(const void *p1, const void *p2);
+struct package_t *depends_resolve(struct package_t *pkgs, void *status);
+
+#ifdef DODEPENDS
+#include <ctype.h>
+
+static char **depends_split(const char *dependsstr)
+{
+ static char *dependsvec[DEPENDSMAX];
+ char *p;
+ int i = 0;
+
+ dependsvec[0] = 0;
+
+ if (dependsstr != 0)
+ {
+ p = strdup(dependsstr);
+ while (*p != 0 && *p != '\n')
+ {
+ if (*p != ' ')
+ {
+ if (*p == ',')
+ {
+ *p = 0;
+ dependsvec[++i] = 0;
+ }
+ else if (dependsvec[i] == 0)
+ dependsvec[i] = p;
+ }
+ else
+ *p = 0; /* eat the space... */
+ p++;
+ }
+ *p = 0;
+ }
+ dependsvec[i+1] = 0;
+ return dependsvec;
+}
+
+static void depends_sort_visit(struct package_t **ordered,
+ struct package_t *pkgs, struct package_t *pkg)
+{
+ /* Topological sort algorithm:
+ * ordered is the output list, pkgs is the dependency graph, pkg is
+ * the current node
+ *
+ * recursively add all the adjacent nodes to the ordered list, marking
+ * each one as visited along the way
+ *
+ * yes, this algorithm looks a bit odd when all the params have the
+ * same type :-)
+ */
+ unsigned short i;
+
+ /* mark node as processing */
+ pkg->color = COLOR_GRAY;
+
+ /* visit each not-yet-visited node */
+ for (i = 0; i < pkg->requiredcount; i++)
+ if (pkg->requiredfor[i]->color == COLOR_WHITE)
+ depends_sort_visit(ordered, pkgs, pkg->requiredfor[i]);
+
+#if 0
+ /* add it to the list */
+ newnode = (struct package_t *)malloc(sizeof(struct package_t));
+ /* make a shallow copy */
+ *newnode = *pkg;
+ newnode->next = *ordered;
+ *ordered = newnode;
+#endif
+ pkg->next = *ordered;
+ *ordered = pkg;
+
+ /* mark node as done */
+ pkg->color = COLOR_BLACK;
+}
+
+static struct package_t *depends_sort(struct package_t *pkgs)
+{
+ /* TODO: it needs to break cycles in the to-be-installed package
+ * graph... */
+ struct package_t *ordered = NULL;
+ struct package_t *pkg;
+
+ for (pkg = pkgs; pkg != 0; pkg = pkg->next)
+ pkg->color = COLOR_WHITE;
+
+ for (pkg = pkgs; pkg != 0; pkg = pkg->next)
+ if (pkg->color == COLOR_WHITE)
+ depends_sort_visit(&ordered, pkgs, pkg);
+
+ /* Leaks the old list... return the new one... */
+ return ordered;
+}
+
+
+/* resolve package dependencies --
+ * for each package in the list of packages to be installed, we parse its
+ * dependency info to determine if the dependent packages are either
+ * already installed, or are scheduled to be installed. If both tests fail
+ * than bail.
+ *
+ * The algorithm here is O(n^2*m) where n = number of packages to be
+ * installed and m is the # of dependencies per package. Not a terribly
+ * efficient algorithm, but given that at any one time you are unlikely
+ * to install a very large number of packages it doesn't really matter
+ */
+struct package_t *depends_resolve(struct package_t *pkgs, void *status)
+{
+ struct package_t *pkg, *chk;
+ struct package_t dependpkg;
+ char **dependsvec;
+ int i;
+ void *found;
+
+ for (pkg = pkgs; pkg != 0; pkg = pkg->next)
+ {
+ dependsvec = depends_split(pkg->depends);
+ i = 0;
+ while (dependsvec[i] != 0)
+ {
+ /* Check for dependencies; first look for installed packages */
+ dependpkg.package = dependsvec[i];
+ if ((found = tfind(&dependpkg, &status, package_compare)) == 0 ||
+ ((chk = *(struct package_t **)found) &&
+ (chk->status & (STATUS_FLAGOK | STATUS_STATUSINSTALLED)) !=
+ (STATUS_FLAGOK | STATUS_STATUSINSTALLED)))
+ {
+ /* if it fails, we look through the list of packages we are going to
+ * install */
+ for (chk = pkgs; chk != 0; chk = chk->next)
+ {
+ if (strcmp(chk->package, dependsvec[i]) == 0 ||
+ (chk->provides &&
+ strncmp(chk->provides, dependsvec[i], strlen(dependsvec[i])) == 0))
+ {
+ if (chk->requiredcount >= DEPENDSMAX)
+ {
+ fprintf(stderr, "Too many dependencies for %s\n",
+ chk->package);
+ return 0;
+ }
+ if (chk != pkg)
+ chk->requiredfor[chk->requiredcount++] = pkg;
+ break;
+ }
+ }
+ if (chk == 0)
+ {
+ fprintf(stderr, "%s depends on %s, but it is not going to be installed\n", pkg->package, dependsvec[i]);
+ return 0;
+ }
+ }
+ i++;
+ }
+ }
+
+ return depends_sort(pkgs);
+}
+#endif
+
+/* Status file handling routines
+ *
+ * This is a fairly minimalistic implementation. there are two main functions
+ * that are supported:
+ *
+ * 1) reading the entire status file:
+ * the status file is read into memory as a binary-tree, with just the
+ * package and status info preserved
+ *
+ * 2) merging the status file
+ * control info from (new) packages is merged into the status file,
+ * replacing any pre-existing entries. when a merge happens, status info
+ * read using the status_read function is written back to the status file
+ */
+
+static const char *statuswords[][10] = {
+ { (char *)STATUS_WANTSTART, "unknown", "install", "hold",
+ "deinstall", "purge", 0 },
+ { (char *)STATUS_FLAGSTART, "ok", "reinstreq", "hold",
+ "hold-reinstreq", 0 },
+ { (char *)STATUS_STATUSSTART, "not-installed", "unpacked", "half-configured",
+ "installed", "half-installed",
+ "config-files", "post-inst-failed",
+ "removal-failed", 0 }
+};
+
+int package_compare(const void *p1, const void *p2)
+{
+ return strcmp(((struct package_t *)p1)->package,
+ ((struct package_t *)p2)->package);
+}
+
+static unsigned long status_parse(const char *line)
+{
+ char *p;
+ int i, j;
+ unsigned long l = 0;
+ for (i = 0; i < 3; i++)
+ {
+ p = strchr(line, ' ');
+ if (p) *p = 0;
+ j = 1;
+ while (statuswords[i][j] != 0)
+ {
+ if (strcmp(line, statuswords[i][j]) == 0)
+ {
+ l |= (1 << ((int)statuswords[i][0] + j - 1));
+ break;
+ }
+ j++;
+ }
+ if (statuswords[i][j] == 0) return 0; /* parse error */
+ line = p+1;
+ }
+ return l;
+}
+
+static const char *status_print(unsigned long flags)
+{
+ /* this function returns a static buffer... */
+ static char buf[256];
+ int i, j;
+
+ buf[0] = 0;
+ for (i = 0; i < 3; i++)
+ {
+ j = 1;
+ while (statuswords[i][j] != 0)
+ {
+ if ((flags & (1 << ((int)statuswords[i][0] + j - 1))) != 0)
+ {
+ strcat(buf, statuswords[i][j]);
+ if (i < 2) strcat(buf, " ");
+ break;
+ }
+ j++;
+ }
+ if (statuswords[i][j] == 0)
+ {
+ fprintf(stderr, "corrupted status flag!!\n");
+ return NULL;
+ }
+ }
+ return buf;
+}
+
+/*
+ * Read a control file (or a stanza of a status file) and parse it,
+ * filling parsed fields into the package structure
+ */
+void control_read(FILE *f, struct package_t *p)
+{
+ char buf[BUFSIZE];
+ while (fgets(buf, BUFSIZE, f) && !feof(f))
+ {
+ buf[strlen(buf)-1] = 0;
+ if (*buf == 0)
+ return;
+ else if (strstr(buf, "Package: ") == buf)
+ {
+ p->package = strdup(buf+9);
+ }
+ else if (strstr(buf, "Status: ") == buf)
+ {
+ p->status = status_parse(buf+8);
+ }
+ else if (strstr(buf, "Depends: ") == buf)
+ {
+ p->depends = strdup(buf+9);
+ }
+ else if (strstr(buf, "Provides: ") == buf)
+ {
+ p->provides = strdup(buf+10);
+ }
+ /* This is specific to the Debian Installer. Ifdef? */
+ else if (strstr(buf, "installer-menu-item: ") == buf)
+ {
+ p->installer_menu_item = atoi(buf+21);
+ }
+ else if (strstr(buf, "Description: ") == buf)
+ {
+ p->description = strdup(buf+13);
+ }
+ /* TODO: localized descriptions */
+ }
+}
+
+void *status_read(void)
+{
+ FILE *f;
+ void *status = 0;
+ struct package_t *m = 0, *p = 0, *t = 0;
+
+ if ((f = fopen(STATUSFILE, "r")) == NULL)
+ {
+ perror(STATUSFILE);
+ return 0;
+ }
+ if (getenv(UDPKG_QUIET) == NULL)
+ printf("(Reading database...)\n");
+ while (!feof(f))
+ {
+ m = (struct package_t *)malloc(sizeof(struct package_t));
+ memset(m, 0, sizeof(struct package_t));
+ control_read(f, m);
+ if (m->package)
+ {
+ /*
+ * If there is an item in the tree by this name,
+ * it must be a virtual package; insert real
+ * package in preference.
+ */
+ tdelete(m, &status, package_compare);
+ tsearch(m, &status, package_compare);
+ if (m->provides)
+ {
+ /*
+ * A "Provides" triggers the insertion
+ * of a pseudo package into the status
+ * binary-tree.
+ */
+ p = (struct package_t *)malloc(sizeof(struct package_t));
+ memset(p, 0, sizeof(struct package_t));
+ p->package = strdup(m->provides);
+
+ t = *(struct package_t **)tsearch(p, &status, package_compare);
+ if (!(t == p))
+ {
+ free(p->package);
+ free(p);
+ }
+ else {
+ /*
+ * Pseudo package status is the
+ * same as the status of the
+ * package providing it
+ * FIXME: (not quite right, if 2
+ * packages of different statuses
+ * provide it).
+ */
+ t->status = m->status;
+ }
+ }
+ }
+ else
+ {
+ free(m);
+ }
+ }
+ fclose(f);
+ return status;
+}
+
+int status_merge(void *status, struct package_t *pkgs)
+{
+ FILE *fin, *fout;
+ char buf[BUFSIZE];
+ struct package_t *pkg = 0, *statpkg = 0;
+ struct package_t locpkg;
+ int r = 0;
+
+ if ((fin = fopen(STATUSFILE, "r")) == NULL)
+ {
+ perror(STATUSFILE);
+ return 0;
+ }
+ if ((fout = fopen(STATUSFILE ".new", "w")) == NULL)
+ {
+ perror(STATUSFILE ".new");
+ return 0;
+ }
+ if (getenv(UDPKG_QUIET) == NULL)
+ printf("(Updating database...)\n");
+ while (fgets(buf, BUFSIZE, fin) && !feof(fin))
+ {
+ buf[strlen(buf)-1] = 0; /* trim newline */
+ /* If we see a package header, find out if it's a package
+ * that we have processed. if so, we skip that block for
+ * now (write it at the end).
+ *
+ * we also look at packages in the status cache and update
+ * their status fields
+ */
+ if (strstr(buf, "Package: ") == buf)
+ {
+ for (pkg = pkgs; pkg != 0 && strncmp(buf+9,
+ pkg->package, strlen(pkg->package))!=0;
+ pkg = pkg->next) ;
+
+ locpkg.package = buf+9;
+ statpkg = tfind(&locpkg, &status, package_compare);
+
+ /* note: statpkg should be non-zero, unless the status
+ * file was changed while we are processing (no locking
+ * is currently done...
+ */
+ if (statpkg != 0) statpkg = *(struct package_t **)statpkg;
+ }
+ if (pkg != 0) continue;
+
+ if (strstr(buf, "Status: ") == buf && statpkg != 0)
+ {
+ snprintf(buf, sizeof(buf), "Status: %s",
+ status_print(statpkg->status));
+ }
+ fputs(buf, fout);
+ fputc('\n', fout);
+ }
+
+ // Print out packages we processed.
+ for (pkg = pkgs; pkg != 0; pkg = pkg->next) {
+ fprintf(fout, "Package: %s\nStatus: %s\n",
+ pkg->package, status_print(pkg->status));
+ if (pkg->depends)
+ fprintf(fout, "Depends: %s\n", pkg->depends);
+ if (pkg->provides)
+ fprintf(fout, "Provides: %s\n", pkg->provides);
+ if (pkg->installer_menu_item)
+ fprintf(fout, "installer-menu-item: %i\n", pkg->installer_menu_item);
+ if (pkg->description)
+ fprintf(fout, "Description: %s\n", pkg->description);
+ fputc('\n', fout);
+ }
+
+ fclose(fin);
+ fclose(fout);
+
+ r = rename(STATUSFILE, STATUSFILE ".bak");
+ if (r == 0) r = rename(STATUSFILE ".new", STATUSFILE);
+ return 0;
+}
+
+#include <errno.h>
+#include <fcntl.h>
+#include <search.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+/*
+ * Main udpkg implementation routines
+ */
+
+#ifdef DODEBUG
+static int do_system(const char *cmd)
+{
+ DPRINTF("cmd is %s\n", cmd);
+ return system(cmd);
+}
+#else
+#define do_system(cmd) system(cmd)
+#endif
+
+static int is_file(const char *fn)
+{
+ struct stat statbuf;
+
+ if (stat(fn, &statbuf) < 0) return 0;
+ return S_ISREG(statbuf.st_mode);
+}
+
+static int dpkg_copyfile(const char *src, const char *dest)
+{
+ /* copy a (regular) file if it exists, preserving the mode, mtime
+ * and atime */
+ char buf[8192];
+ int infd, outfd;
+ int r;
+ struct stat srcStat;
+ struct utimbuf times;
+
+ if (stat(src, &srcStat) < 0)
+ {
+ if (errno == 2) return 0; else return -1;
+ }
+ if ((infd = open(src, O_RDONLY)) < 0)
+ return -1;
+ if ((outfd = open(dest, O_WRONLY|O_CREAT|O_TRUNC, srcStat.st_mode)) < 0)
+ return -1;
+ while ((r = read(infd, buf, sizeof(buf))) > 0)
+ {
+ if (write(outfd, buf, r) < 0)
+ return -1;
+ }
+ close(outfd);
+ close(infd);
+ if (r < 0) return -1;
+ times.actime = srcStat.st_atime;
+ times.modtime = srcStat.st_mtime;
+ if (utime(dest, ×) < 0) return -1;
+ return 1;
+}
+
+static int dpkg_doconfigure(struct package_t *pkg)
+{
+ int r;
+ char postinst[1024];
+ char buf[1024];
+ DPRINTF("Configuring %s\n", pkg->package);
+ pkg->status &= STATUS_STATUSMASK;
+ snprintf(postinst, sizeof(postinst), "%s%s.postinst", INFODIR, pkg->package);
+ if (is_file(postinst))
+ {
+ snprintf(buf, sizeof(buf), "%s configure", postinst);
+ if ((r = do_system(buf)) != 0)
+ {
+ fprintf(stderr, "postinst exited with status %d\n", r);
+ pkg->status |= STATUS_STATUSHALFCONFIGURED;
+ return 1;
+ }
+ }
+
+ pkg->status |= STATUS_STATUSINSTALLED;
+
+ return 0;
+}
+
+static int dpkg_dounpack(struct package_t *pkg)
+{
+ int r = 0;
+ char *cwd, *p;
+ FILE *infp, *outfp;
+ char buf[1024], buf2[1024];
+ int i;
+ char *adminscripts[] = { "prerm", "postrm", "preinst", "postinst",
+ "conffiles", "md5sums", "shlibs",
+ "templates" };
+
+ DPRINTF("Unpacking %s\n", pkg->package);
+
+ cwd = getcwd(0, 0);
+ chdir("/");
+ snprintf(buf, sizeof(buf), "ar -p %s data.tar.gz|zcat|tar -xf -", pkg->file);
+ if (SYSTEM(buf) == 0)
+ {
+ /* Installs the package scripts into the info directory */
+ for (i = 0; i < sizeof(adminscripts) / sizeof(adminscripts[0]);
+ i++)
+ {
+ snprintf(buf, sizeof(buf), "%s%s/%s",
+ DPKGCIDIR, pkg->package, adminscripts[i]);
+ snprintf(buf2, sizeof(buf), "%s%s.%s",
+ INFODIR, pkg->package, adminscripts[i]);
+ if (dpkg_copyfile(buf, buf2) < 0)
+ {
+ fprintf(stderr, "Cannot copy %s to %s: %s\n",
+ buf, buf2, strerror(errno));
+ r = 1;
+ break;
+ }
+ else
+ {
+ /* ugly hack to create the list file; should
+ * probably do something more elegant
+ *
+ * why oh why does dpkg create the list file
+ * so oddly...
+ */
+ snprintf(buf, sizeof(buf),
+ "ar -p %s data.tar.gz|zcat|tar -tf -",
+ pkg->file);
+ snprintf(buf2, sizeof(buf2),
+ "%s%s.list", INFODIR, pkg->package);
+ if ((infp = popen(buf, "r")) == NULL ||
+ (outfp = fopen(buf2, "w")) == NULL)
+ {
+ fprintf(stderr, "Cannot create %s\n",
+ buf2);
+ r = 1;
+ break;
+ }
+ while (fgets(buf, sizeof(buf), infp) &&
+ !feof(infp))
+ {
+ p = buf;
+ if (*p == '.') p++;
+ if (*p == '/' && *(p+1) == '\n')
+ {
+ *(p+1) = '.';
+ *(p+2) = '\n';
+ *(p+3) = 0;
+ }
+ if (p[strlen(p)-2] == '/')
+ {
+ p[strlen(p)-2] = '\n';
+ p[strlen(p)-1] = 0;
+ }
+ fputs(p, outfp);
+ }
+ fclose(infp);
+ fclose(outfp);
+ }
+ }
+ pkg->status &= STATUS_WANTMASK;
+ pkg->status |= STATUS_WANTINSTALL;
+ pkg->status &= STATUS_FLAGMASK;
+ pkg->status |= STATUS_FLAGOK;
+ pkg->status &= STATUS_STATUSMASK;
+ if (r == 0)
+ pkg->status |= STATUS_STATUSUNPACKED;
+ else
+ pkg->status |= STATUS_STATUSHALFINSTALLED;
+ }
+ chdir(cwd);
+ return r;
+}
+
+static int dpkg_doinstall(struct package_t *pkg)
+{
+ DPRINTF("Installing %s\n", pkg->package);
+ return (dpkg_dounpack(pkg) || dpkg_doconfigure(pkg));
+}
+
+static int dpkg_unpackcontrol(struct package_t *pkg)
+{
+ int r = 1;
+ char *cwd = 0;
+ char *p;
+ char buf[1024];
+ FILE *f;
+
+ p = strrchr(pkg->file, '/');
+ if (p) p++; else p = pkg->file;
+ p = pkg->package = strdup(p);
+ while (*p != 0 && *p != '_' && *p != '.') p++;
+ *p = 0;
+
+ cwd = getcwd(0, 0);
+ snprintf(buf, sizeof(buf), "%s%s", DPKGCIDIR, pkg->package);
+ DPRINTF("dir = %s\n", buf);
+ if (mkdir(buf, S_IRWXU) == 0 && chdir(buf) == 0)
+ {
+ snprintf(buf, sizeof(buf), "ar -p %s control.tar.gz|zcat|tar -xf -",
+ pkg->file);
+ if (SYSTEM(buf) == 0)
+ {
+ if ((f = fopen("control", "r")) != NULL) {
+ control_read(f, pkg);
+ r = 0;
+ }
+ }
+ }
+
+ chdir(cwd);
+ free(cwd);
+ return r;
+}
+
+static int dpkg_unpack(struct package_t *pkgs)
+{
+ int r = 0;
+ struct package_t *pkg;
+ void *status = status_read();
+
+ if (SYSTEM("rm -rf -- " DPKGCIDIR) != 0 ||
+ mkdir(DPKGCIDIR, S_IRWXU) != 0)
+ {
+ perror("mkdir");
+ return 1;
+ }
+
+ for (pkg = pkgs; pkg != 0; pkg = pkg->next)
+ {
+ dpkg_unpackcontrol(pkg);
+ r = dpkg_dounpack(pkg);
+ if (r != 0) break;
+ }
+ status_merge(status, pkgs);
+ SYSTEM("rm -rf -- " DPKGCIDIR);
+ return r;
+}
+
+static int dpkg_configure(struct package_t *pkgs)
+{
+ int r = 0;
+ void *found;
+ struct package_t *pkg;
+ void *status = status_read();
+ for (pkg = pkgs; pkg != 0 && r == 0; pkg = pkg->next)
+ {
+ found = tfind(pkg, &status, package_compare);
+ if (found == 0)
+ {
+ fprintf(stderr, "Trying to configure %s, but it is not installed\n", pkg->package);
+ r = 1;
+ }
+ else
+ {
+ /* configure the package listed in the status file;
+ * not pkg, as we have info only for the latter */
+ r = dpkg_doconfigure(*(struct package_t **)found);
+ }
+ }
+ status_merge(status, 0);
+ return r;
+}
+
+static int dpkg_install(struct package_t *pkgs)
+{
+ struct package_t *p, *ordered = 0;
+ void *status = status_read();
+ if (SYSTEM("rm -rf -- " DPKGCIDIR) != 0 ||
+ mkdir(DPKGCIDIR, S_IRWXU) != 0)
+ {
+ perror("mkdir");
+ return 1;
+ }
+
+ /* Stage 1: parse all the control information */
+ for (p = pkgs; p != 0; p = p->next)
+ if (dpkg_unpackcontrol(p) != 0)
+ {
+ perror(p->file);
+ /* force loop break, and prevents further ops */
+ pkgs = 0;
+ }
+
+ /* Stage 2: resolve dependencies */
+#ifdef DODEPENDS
+ ordered = depends_resolve(pkgs, status);
+#else
+ ordered = pkgs;
+#endif
+
+ /* Stage 3: install */
+ for (p = ordered; p != 0; p = p->next)
+ {
+ p->status &= STATUS_WANTMASK;
+ p->status |= STATUS_WANTINSTALL;
+
+ /* for now the flag is always set to ok... this is probably
+ * not what we want
+ */
+ p->status &= STATUS_FLAGMASK;
+ p->status |= STATUS_FLAGOK;
+
+ if (dpkg_doinstall(p) != 0)
+ {
+ perror(p->file);
+ }
+ }
+
+ if (ordered != 0)
+ status_merge(status, pkgs);
+ SYSTEM("rm -rf -- " DPKGCIDIR);
+ return 0;
+}
+
+static int dpkg_remove(struct package_t *pkgs)
+{
+ struct package_t *p;
+ void *status = status_read();
+ for (p = pkgs; p != 0; p = p->next)
+ {
+ }
+ status_merge(status, 0);
+ return 0;
+}
+
+int dpkg_main(int argc, char **argv)
+{
+ char opt = 0;
+ char *s;
+ struct package_t *p, *packages = NULL;
+ char *cwd = getcwd(0, 0);
+ while (*++argv)
+ {
+ if (**argv == '-') {
+ /* Nasty little hack to "parse" long options. */
+ s = *argv;
+ while (*s == '-')
+ s++;
+ opt=s[0];
+ }
+ else
+ {
+ p = (struct package_t *)malloc(sizeof(struct package_t));
+ memset(p, 0, sizeof(struct package_t));
+ if (**argv == '/')
+ p->file = *argv;
+ else if (opt != 'c')
+ {
+ p->file = malloc(strlen(cwd) + strlen(*argv) + 2);
+ sprintf(p->file, "%s/%s", cwd, *argv);
+ }
+ else {
+ p->package = strdup(*argv);
+ }
+ p->next = packages;
+ packages = p;
+ }
+
+ }
+ switch (opt)
+ {
+ case 'i': return dpkg_install(packages); break;
+ case 'r': return dpkg_remove(packages); break;
+ case 'u': return dpkg_unpack(packages); break;
+ case 'c': return dpkg_configure(packages); break;
+ }
+
+ /* if it falls through to here, some of the command line options were
+ wrong */
+ usage(dpkg_usage);
+ return 0;
+}
\ No newline at end of file