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-rw-r--r--dpkg.c325
1 files changed, 175 insertions, 150 deletions
diff --git a/dpkg.c b/dpkg.c
index ef120a1..7b4c74d 100644
--- a/dpkg.c
+++ b/dpkg.c
@@ -35,9 +35,13 @@
#define BUFSIZE 4096
#define DEPENDSMAX 64 /* maximum number of depends we can handle */
-#define ADMINDIR "/var/lib/dpkg"
-#define STATUSFILE ADMINDIR ## "/status.udeb"
-#define DPKGCIDIR ADMINDIR ## "/tmp.ci/"
+static const char statusfile[] = "/var/lib/dpkg/status.udeb";
+static const char new_statusfile[] = "/var/lib/dpkg/status.udeb.new";
+static const char bak_statusfile[] = "/var/lib/dpkg/status.udeb.bak";
+
+static const char dpkgcidir[] = "/var/lib/dpkg/tmp.ci/";
+static const char rm_dpkgcidir[] = "rm -rf /var/lib/dpkg/tmp.ci/";
+
static const char infodir[] = "/var/lib/dpkg/info/";
static const char udpkg_quiet[] = "UDPKG_QUIET";
@@ -95,6 +99,16 @@ typedef struct package_s {
struct package_s *next;
} package_t;
+#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 package_compare(const void *p1, const void *p2)
{
return strcmp(((package_t *)p1)->package,
@@ -111,41 +125,46 @@ static char **depends_split(const char *dependsstr)
int i = 0;
dependsvec[0] = 0;
+ if (dependsstr == 0) {
+ goto end;
+ }
- 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;
+ p = strdup(dependsstr);
+ while (*p != 0 && *p != '\n') {
+ if (*p != ' ') {
+ if (*p == ',') {
+ *p = 0;
+ dependsvec[++i] = 0;
} else {
- *p = 0; /* eat the space... */
+ if (dependsvec[i] == 0) {
+ dependsvec[i] = p;
+ }
}
- p++;
+ } else {
+ *p = 0; /* eat the space... */
}
- *p = 0;
+ p++;
}
+ *p = 0;
+
+end:
dependsvec[i+1] = 0;
return dependsvec;
}
+/* 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 :-)
+ */
static void depends_sort_visit(package_t **ordered, package_t *pkgs,
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 */
@@ -164,6 +183,7 @@ static void depends_sort_visit(package_t **ordered, package_t *pkgs,
newnode->next = *ordered;
*ordered = newnode;
#endif
+
pkg->next = *ordered;
*ordered = pkg;
@@ -178,12 +198,14 @@ static package_t *depends_sort(package_t *pkgs)
package_t *ordered = NULL;
package_t *pkg;
- for (pkg = pkgs; pkg != 0; pkg = pkg->next)
+ 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)
+ }
+ 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;
@@ -218,17 +240,15 @@ static package_t *depends_resolve(package_t *pkgs, void *status)
if ((found = tfind(&dependpkg, &status, package_compare)) == 0 ||
((chk = *(package_t **)found) &&
(chk->status & (status_flagok | status_statusinstalled)) !=
- (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 &&
+ 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);
+ fprintf(stderr, "Too many dependencies for %s\n", chk->package);
return 0;
}
if (chk != pkg) {
@@ -264,16 +284,16 @@ static package_t *depends_resolve(package_t *pkgs, void *status)
* 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 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;
+
+ for (i = 0; i < 3; i++) {
+ if ((p = strchr(line, ' ')) != NULL) {
+ *p = 0;
+ }
j = 1;
while (statuswords[i][j] != 0) {
if (strcmp(line, statuswords[i][j]) == 0) {
@@ -288,6 +308,7 @@ static unsigned long status_parse(const char *line)
}
line = p+1;
}
+
return l;
}
@@ -313,6 +334,7 @@ static const char *status_print(unsigned long flags)
return NULL;
}
}
+
return buf;
}
@@ -326,6 +348,7 @@ static void control_read(FILE *file, package_t *p)
while ((line = get_line_from_file(file)) != NULL) {
line[strlen(line)] = 0;
+
if (strlen(line) == 0) {
break;
} else
@@ -359,13 +382,15 @@ static void *status_read(void)
void *status = 0;
package_t *m = 0, *p = 0, *t = 0;
- if ((f = fopen(STATUSFILE, "r")) == NULL) {
- perror(STATUSFILE);
+ if ((f = fopen(statusfile, "r")) == NULL) {
+ perror(statusfile);
return 0;
}
+
if (getenv(udpkg_quiet) == NULL) {
printf("(Reading database...)\n");
}
+
while (!feof(f)) {
m = (package_t *)xmalloc(sizeof(package_t));
memset(m, 0, sizeof(package_t));
@@ -389,7 +414,7 @@ static void *status_read(void)
p->package = strdup(m->provides);
t = *(package_t **)tsearch(p, &status, package_compare);
- if (!(t == p)) {
+ if (t != p) {
free(p->package);
free(p);
}
@@ -422,18 +447,19 @@ static int status_merge(void *status, package_t *pkgs)
package_t locpkg;
int r = 0;
- if ((fin = fopen(STATUSFILE, "r")) == NULL) {
- perror(STATUSFILE);
+ if ((fin = fopen(statusfile, "r")) == NULL) {
+ perror(statusfile);
return 0;
}
- if ((fout = fopen(STATUSFILE ".new", "w")) == NULL) {
- perror(STATUSFILE ".new");
+ if ((fout = fopen(new_statusfile, "w")) == NULL) {
+ perror(new_statusfile);
return 0;
}
if (getenv(udpkg_quiet) == NULL) {
printf("(Updating database...)\n");
}
- while (((line = get_line_from_file(fin)) != NULL) && (feof(fin) != 0)) {
+
+ while (((line = get_line_from_file(fin)) != NULL) && !feof(fin)) {
line[strlen(line)] = 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
@@ -488,26 +514,13 @@ static int status_merge(void *status, package_t *pkgs)
fclose(fin);
fclose(fout);
- r = rename(STATUSFILE, STATUSFILE ".bak");
+ r = rename(statusfile, bak_statusfile);
if (r == 0) {
- r = rename(STATUSFILE ".new", STATUSFILE);
+ r = rename(new_statusfile, statusfile);
}
- return 0;
-}
-
-/*
- * Main udpkg implementation routines
- */
-#ifdef DODEBUG
-static int do_system(const char *cmd)
-{
- DPRINTF("cmd is %s\n", cmd);
- return system(cmd);
+ return 0;
}
-#else
-#define do_system(cmd) system(cmd)
-#endif
static int is_file(const char *fn)
{
@@ -524,9 +537,11 @@ static int dpkg_doconfigure(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) {
@@ -535,7 +550,6 @@ static int dpkg_doconfigure(package_t *pkg)
return 1;
}
}
-
pkg->status |= status_statusinstalled;
return 0;
@@ -543,80 +557,78 @@ static int dpkg_doconfigure(package_t *pkg)
static int dpkg_dounpack(package_t *pkg)
{
- int r = 0;
+ int r = 0, i;
char *cwd, *p;
FILE *infp, *outfp;
char buf[1024], buf2[1024];
- int i;
char *adminscripts[] = { "prerm", "postrm", "preinst", "postinst",
- "conffiles", "md5sums", "shlibs",
- "templates" };
+ "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 (copy_file(buf, buf2, TRUE, FALSE, FALSE) < 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);
+ if (SYSTEM(buf) != 0) {
+ goto end;
+ }
+ /* 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 (copy_file(buf, buf2, TRUE, FALSE, FALSE) < 0) {
+ fprintf(stderr, "Cannot copy %s to %s: %s\n",
+ buf, buf2, strerror(errno));
+ r = 1;
+ break;
+ }
+ /* 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);
}
- 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;
+ 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;
}
+end:
chdir(cwd);
return r;
}
@@ -638,15 +650,17 @@ static int dpkg_unpackcontrol(package_t *pkg)
p = strrchr(pkg->file, '/');
if (p) p++; else p = pkg->file;
p = pkg->package = strdup(p);
- while (*p != 0 && *p != '_' && *p != '.') p++;
+ while (*p != 0 && *p != '_' && *p != '.') {
+ p++;
+ }
*p = 0;
cwd = getcwd(0, 0);
- snprintf(buf, sizeof(buf), "%s%s", DPKGCIDIR, pkg->package);
+ 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);
+ 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);
@@ -654,9 +668,9 @@ static int dpkg_unpackcontrol(package_t *pkg)
}
}
}
-
chdir(cwd);
free(cwd);
+
return r;
}
@@ -666,19 +680,19 @@ static int dpkg_unpack(package_t *pkgs)
package_t *pkg;
void *status = status_read();
- if (SYSTEM("rm -rf -- " DPKGCIDIR) != 0 ||
- mkdir(DPKGCIDIR, S_IRWXU) != 0) {
+ if (SYSTEM(rm_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);
+ SYSTEM(rm_dpkgcidir);
+
return r;
}
@@ -688,18 +702,23 @@ static int dpkg_configure(package_t *pkgs)
void *found;
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 */
+ }
+ /* configure the package listed in the status file;
+ * not pkg, as we have info only for the latter
+ */
+ else {
r = dpkg_doconfigure(*(package_t **)found);
}
}
status_merge(status, 0);
+
return r;
}
@@ -707,8 +726,9 @@ static int dpkg_install(package_t *pkgs)
{
package_t *p, *ordered = 0;
void *status = status_read();
- if (SYSTEM("rm -rf -- " DPKGCIDIR) != 0 ||
- mkdir(DPKGCIDIR, S_IRWXU) != 0) {
+
+ if (SYSTEM(rm_dpkgcidir) != 0 ||
+ mkdir(dpkgcidir, S_IRWXU) != 0) {
perror("mkdir");
return 1;
}
@@ -747,7 +767,8 @@ static int dpkg_install(package_t *pkgs)
if (ordered != 0) {
status_merge(status, pkgs);
}
- SYSTEM("rm -rf -- " DPKGCIDIR);
+ SYSTEM(rm_dpkgcidir);
+
return 0;
}
@@ -755,10 +776,12 @@ static int dpkg_remove(package_t *pkgs)
{
package_t *p;
void *status = status_read();
+
for (p = pkgs; p != 0; p = p->next)
{
}
status_merge(status, 0);
+
return 0;
}
@@ -768,16 +791,19 @@ extern int dpkg_main(int argc, char **argv)
char *s;
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 == '-')
+ while (*s == '-') {
s++;
+ }
opt=s[0];
} else {
p = (package_t *)xmalloc(sizeof(package_t));
memset(p, 0, sizeof(package_t));
+
if (**argv == '/') {
p->file = *argv;
} else
@@ -787,11 +813,12 @@ extern int dpkg_main(int argc, char **argv)
} else {
p->package = strdup(*argv);
}
+
p->next = packages;
packages = p;
- }
-
+ }
}
+
switch (opt) {
case 'i':
return dpkg_install(packages);
@@ -801,10 +828,8 @@ extern int dpkg_main(int argc, char **argv)
return dpkg_unpack(packages);
case 'c':
return dpkg_configure(packages);
+ default :
+ usage(dpkg_usage);
+ return 0;
}
-
- /* 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
generated by cgit v1.1 at 2024-12-30 19:11:46 +0000