ujail: use more const in elf.*

Signed-off-by: Etienne CHAMPETIER <champetier.etienne@gmail.com>

diff --git a/jail/elf.c b/jail/elf.c
index 34a5aca..fb046b4 100644 (file)
--- a/jail/elf.c
+++ b/jail/elf.c
@@ -69,7 +69,7 @@ static void alloc_library(const char *path, const char *name)
        DEBUG("adding library %s/%s\n", path, name);
 }
 
-static int elf_open(char **dir, char *file)
+static int elf_open(char **dir, const char *file)
 {
        struct library_path *p;
        char path[256];
@@ -95,7 +95,7 @@ static int elf_open(char **dir, char *file)
        return fd;
 }
 
-char* find_lib(char *file)
+const char* find_lib(const char *file)
 {
        struct library *l;
        static char path[256];
@@ -114,7 +114,7 @@ char* find_lib(char *file)
        return path;
 }
 
-static int elf64_find_section(char *map, unsigned int type, unsigned int *offset, unsigned int *size, unsigned int *vaddr)
+static int elf64_find_section(const char *map, unsigned int type, unsigned int *offset, unsigned int *size, unsigned int *vaddr)
 {
        Elf64_Ehdr *e;
        Elf64_Phdr *ph;
@@ -137,7 +137,7 @@ static int elf64_find_section(char *map, unsigned int type, unsigned int *offset
        return -1;
 }
 
-static int elf32_find_section(char *map, unsigned int type, unsigned int *offset, unsigned int *size, unsigned int *vaddr)
+static int elf32_find_section(const char *map, unsigned int type, unsigned int *offset, unsigned int *size, unsigned int *vaddr)
 {
        Elf32_Ehdr *e;
        Elf32_Phdr *ph;
@@ -160,7 +160,7 @@ static int elf32_find_section(char *map, unsigned int type, unsigned int *offset
        return -1;
 }
 
-static int elf_find_section(char *map, unsigned int type, unsigned int *offset, unsigned int *size, unsigned int *vaddr)
+static int elf_find_section(const char *map, unsigned int type, unsigned int *offset, unsigned int *size, unsigned int *vaddr)
 {
        int clazz = map[EI_CLASS];
 
@@ -174,10 +174,10 @@ static int elf_find_section(char *map, unsigned int type, unsigned int *offset,
        return -1;
 }
 
-static int elf32_scan_dynamic(char *map, int dyn_offset, int dyn_size, int load_offset)
+static int elf32_scan_dynamic(const char *map, int dyn_offset, int dyn_size, int load_offset)
 {
        Elf32_Dyn *dynamic = (Elf32_Dyn *) (map + dyn_offset);
-       char *strtab = NULL;
+       const char *strtab = NULL;
 
        while ((void *) dynamic < (void *) (map + dyn_offset + dyn_size)) {
                Elf32_Dyn *curr = dynamic;
@@ -208,10 +208,10 @@ static int elf32_scan_dynamic(char *map, int dyn_offset, int dyn_size, int load_
        return 0;
 }
 
-static int elf64_scan_dynamic(char *map, int dyn_offset, int dyn_size, int load_offset)
+static int elf64_scan_dynamic(const char *map, int dyn_offset, int dyn_size, int load_offset)
 {
        Elf64_Dyn *dynamic = (Elf64_Dyn *) (map + dyn_offset);
-       char *strtab = NULL;
+       const char *strtab = NULL;
 
        while ((void *) dynamic < (void *) (map + dyn_offset + dyn_size)) {
                Elf64_Dyn *curr = dynamic;
@@ -242,7 +242,7 @@ static int elf64_scan_dynamic(char *map, int dyn_offset, int dyn_size, int load_
        return 0;
 }
 
-int elf_load_deps(char *library)
+int elf_load_deps(const char *library)
 {
        unsigned int dyn_offset, dyn_size;
        unsigned int load_offset, load_vaddr;
@@ -288,10 +288,12 @@ int elf_load_deps(char *library)
        if (dir) {
                alloc_library(dir, library);
        } else {
-               char *elf = strdup(library);
+               char *elf1 = strdup(library);
+               char *elf2 = strdup(library);
 
-               alloc_library(dirname(elf), basename(library));
-               free(elf);
+               alloc_library(dirname(elf1), basename(elf2));
+               free(elf1);
+               free(elf2);
        }
        clazz = map[EI_CLASS];
 

diff --git a/jail/elf.h b/jail/elf.h
index 19ceb3e..ddbe234 100644 (file)
--- a/jail/elf.h
+++ b/jail/elf.h
@@ -31,8 +31,8 @@ struct library_path {
 extern struct avl_tree libraries;
 
 void alloc_library_path(const char *path);
-char* find_lib(char *file);
-int elf_load_deps(char *library);
+int elf_load_deps(const char *library);
+const char* find_lib(const char *file);
 void load_ldso_conf(const char *conf);
 
 #endif

diff --git a/jail/jail.c b/jail/jail.c
index 9952ed9..52f88ef 100644 (file)
--- a/jail/jail.c
+++ b/jail/jail.c
@@ -212,7 +212,7 @@ static char** build_envp(const char *seccomp)
        static char preload_var[64];
        static char seccomp_var[64];
        static char debug_var[] = "LD_DEBUG=all";
-       char *preload_lib = find_lib("libpreload-seccomp.so");
+       const char *preload_lib = find_lib("libpreload-seccomp.so");
        int count = 0;
 
        if (seccomp && !preload_lib) {