From: Nathan Wagner <nw@hydaspes.if.org>
Date: Sat, 29 Sep 2018 22:35:06 +0000 (+0000)
Subject: fix pointer related bugs
X-Git-Tag: v0.1.7~13
X-Git-Url: https://pd.if.org/git/?p=zpackage;a=commitdiff_plain;h=e65e12081df227971bcf449ebcb230e1c980649b

fix pointer related bugs
---

diff --git a/lib/dbquery.c b/lib/dbquery.c
index d6ef8b5..3f81841 100644
--- a/lib/dbquery.c
+++ b/lib/dbquery.c
@@ -12,7 +12,11 @@ sqlite3_stmt *zpm_dbquery(struct zpm *zpm, char *query, ...) {
 	sqlite3_stmt *st;
 	int rv;
 
-	if (!zpm || zpm->error || !zpm->db) {
+	if (!zpm || zpm->error) {
+		return 0;
+	}
+
+	if (!zpm->db) {
 		zpm->error = 1;
 		return 0;
 	}
diff --git a/lib/vercmp.c b/lib/vercmp.c
index 91d5363..16cf1cd 100644
--- a/lib/vercmp.c
+++ b/lib/vercmp.c
@@ -52,6 +52,9 @@ static int ver_cmp(struct ver *a, struct ver *b) {
 	}
 	if (a->type == 1) {
 		int cmp;
+		if (a->s && ! b->s) return 1;
+		if (b->s && ! a->s) return -1;
+		if (!b->s && ! a->s) return 0;
 		cmp = strcmp(a->s, b->s);
 		if (cmp == 0) {
 			return 0;
@@ -127,6 +130,9 @@ int zpm_vercmp(const char *vsa, const char *vsb) {
 			}
 			return an < bn ? -1 : 1;
 		}
+		if (an == 0 && bn == 0) {
+			return 0;
+		}
 		cmp = ver_cmp(&a, &b);
 		if (cmp != 0) {
 			return cmp;
diff --git a/lib/zpm.c b/lib/zpm.c
index b8b77b0..e775b12 100644
--- a/lib/zpm.c
+++ b/lib/zpm.c
@@ -328,6 +328,10 @@ int zpm_init(struct zpm *pkg, char *path) {
 	sqlite3 *db = 0;
 	int appid;
 
+	if (!pkg) {
+		return 0;
+	}
+
 	zpm_clearmem(pkg);
 
 	rc = sqlite3_open_v2(path, &db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL);
@@ -576,7 +580,7 @@ static int set_elf_info(sqlite3 *db, char *hash, char *content, size_t length) {
 
 		/* if exe, set neededs */
 		if (libelf_type(content) == ET_EXEC) {
-			Elf64_Shdr *dsect;
+			Elf64_Shdr *dsect = 0;
 			char *elf;
 
 			elf = (char *)content;
@@ -587,10 +591,17 @@ static int set_elf_info(sqlite3 *db, char *hash, char *content, size_t length) {
 					dsect = (Elf64_Shdr *)(elf + phdr->p_offset);
 				}
 			}
+			if (!dsect) {
+				/* no dynamic section found */
+				return 1;
+			}
+
+#if 0
 			dyn = (Elf64_Dyn *)(elf + dsect->sh_offset);
 			if (!dyn) {
 				exit(9);
 			}
+#endif
 			dyn = (Elf64_Dyn *)dsect;
 
 			dsect = libelf_section(elf, SHT_DYNAMIC);
diff --git a/zpm-runscript.c b/zpm-runscript.c
index 06d0c70..ccaee48 100644
--- a/zpm-runscript.c
+++ b/zpm-runscript.c
@@ -192,8 +192,12 @@ int main(int ac, char **av){
 						pkgid, rv);
 			}
 			/* TODO log output */
-			unlink(script);
-			unlink(output);
+			if (script) {
+				unlink(script);
+			}
+			if (output) {
+				unlink(output);
+			}
 			if (rv) {
 				failures++;
 			}