preparatory patch for -Wwrite-strings #6

git-svn-id: svn://busybox.net/trunk/busybox@17659 69ca8d6d-28ef-0310-b511-8ec308f3f277

7 files changed, 74 insertions, 76 deletions

diff --git a/include/libbb.h b/include/libbb.h
index 99a9422f0..ed1c41a02 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -123,8 +123,8 @@
 
 /* This structure defines protocol families and their handlers. */
 struct aftype {
-        char *name;
-        char *title;
+        const char *name;
+        const char *title;
         int af;
         int alen;
         char *(*print) (unsigned char *);
@@ -143,8 +143,8 @@ struct aftype {
 
 /* This structure defines hardware protocols and their handlers. */
 struct hwtype {
-        char *name;
-        char *title;
+        const char *name;
+        const char *title;
         int type;
         int alen;
         char *(*print) (unsigned char *);
diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index dcab493f1..94f7b22c2 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -37,9 +37,9 @@ struct dep_t {	/* one-way list of dependency rules */
 
 struct mod_list_t {     /* two-way list of modules to process */
         /* a module description */
-        char *  m_name;
-        char *  m_path;
-        struct mod_opt_t *  m_options;
+        const char * m_name;
+        char * m_path;
+        struct mod_opt_t * m_options;
 
         struct mod_list_t * m_prev;
         struct mod_list_t * m_next;
@@ -577,7 +577,7 @@ done:
         return ret;
 }
 
-static int mod_process(struct mod_list_t *list, int do_insert)
+static int mod_process(const struct mod_list_t *list, int do_insert)
 {
         int rc = 0;
         char **argv = NULL;
@@ -603,16 +603,16 @@ static int mod_process(struct mod_list_t *list, int do_insert)
                 argv = xmalloc(6 * sizeof(char*));
                 if (do_insert) {
                         if (already_loaded(list->m_name) != 1) {
-                                argv[argc++] = "insmod";
+                                argv[argc++] = (char*)"insmod";
                                 if (ENABLE_FEATURE_2_4_MODULES) {
                                         if (do_syslog)
-                                                argv[argc++] = "-s";
+                                                argv[argc++] = (char*)"-s";
                                         if (autoclean)
-                                                argv[argc++] = "-k";
+                                                argv[argc++] = (char*)"-k";
                                         if (quiet)
-                                                argv[argc++] = "-q";
+                                                argv[argc++] = (char*)"-q";
                                         else if (verbose) /* verbose and quiet are mutually exclusive */
-                                                argv[argc++] = "-v";
+                                                argv[argc++] = (char*)"-v";
                                 }
                                 argv[argc++] = list->m_path;
                                 if (ENABLE_FEATURE_CLEAN_UP)
@@ -629,10 +629,10 @@ static int mod_process(struct mod_list_t *list, int do_insert)
                 } else {
                         /* modutils uses short name for removal */
                         if (already_loaded(list->m_name) != 0) {
-                                argv[argc++] = "rmmod";
+                                argv[argc++] = (char*)"rmmod";
                                 if (do_syslog)
-                                        argv[argc++] = "-s";
-                                argv[argc++] = list->m_name;
+                                        argv[argc++] = (char*)"-s";
+                                argv[argc++] = (char*)list->m_name;
                                 if (ENABLE_FEATURE_CLEAN_UP)
                                         argc_malloc = argc;
                         }
@@ -810,13 +810,14 @@ static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **t
 
 static int mod_insert(char *mod, int argc, char **argv)
 {
-        struct mod_list_t *tail = 0;
-        struct mod_list_t *head = 0;
+        struct mod_list_t *tail = NULL;
+        struct mod_list_t *head = NULL;
         int rc;
 
         // get dep list for module mod
         check_dep(mod, &head, &tail);
 
+        rc = 1;
         if (head && tail) {
                 if (argc) {
                         int i;
@@ -826,7 +827,8 @@ static int mod_insert(char *mod, int argc, char **argv)
                 }
 
                 // process tail ---> head
-                if ((rc = mod_process(tail, 1)) != 0) {
+                rc = mod_process(tail, 1);
+                if (rc) {
                         /*
                          * In case of using udev, multiple instances of modprobe can be
                          * spawned to load the same module (think of two same usb devices,
@@ -837,31 +839,26 @@ static int mod_insert(char *mod, int argc, char **argv)
                                 rc = 0;
                 }
         }
-        else
-                rc = 1;
-
         return rc;
 }
 
 static int mod_remove(char *mod)
 {
         int rc;
-        static struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL };
+        static const struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL };
 
-        struct mod_list_t *head = 0;
-        struct mod_list_t *tail = 0;
+        struct mod_list_t *head = NULL;
+        struct mod_list_t *tail = NULL;
 
         if (mod)
                 check_dep(mod, &head, &tail);
         else  // autoclean
-                head = tail = &rm_a_dummy;
+                head = tail = (struct mod_list_t*) &rm_a_dummy;
 
+        rc = 1;
         if (head && tail)
                 rc = mod_process(head, 0);  // process head ---> tail
-        else
-                rc = 1;
         return rc;
-
 }
 
 int modprobe_main(int argc, char** argv)
diff --git a/networking/interface.c b/networking/interface.c
index fbcf50152..f345cb09d 100644
--- a/networking/interface.c
+++ b/networking/interface.c
@@ -31,18 +31,9 @@
  *                      (default AF was wrong)
  */
 
-#include "inet_common.h"
-#include <stdio.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
 #include <net/if.h>
 #include <net/if_arp.h>
+#include "inet_common.h"
 #include "busybox.h"
 
 #ifdef CONFIG_FEATURE_IPV6
@@ -178,8 +169,7 @@ static char *INET6_sprint(struct sockaddr *sap, int numeric)
 
         if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
                 return safe_strncpy(buff, "[NONE SET]", sizeof(buff));
-        if (INET6_rresolve
-                (buff, sizeof(buff), (struct sockaddr_in6 *) sap, numeric) != 0)
+        if (INET6_rresolve(buff, sizeof(buff), (struct sockaddr_in6 *) sap, numeric))
                 return safe_strncpy(buff, "[UNKNOWN]", sizeof(buff));
         return buff;
 }
@@ -771,7 +761,7 @@ static int if_fetch(struct interface *ife)
 static int do_if_fetch(struct interface *ife)
 {
         if (if_fetch(ife) < 0) {
-                char *errmsg;
+                const char *errmsg;
 
                 if (errno == ENODEV) {
                         /* Give better error message for this case. */
diff --git a/networking/libiproute/ll_proto.c b/networking/libiproute/ll_proto.c
index 20f26ca3f..aad460b5f 100644
--- a/networking/libiproute/ll_proto.c
+++ b/networking/libiproute/ll_proto.c
@@ -24,7 +24,7 @@
 #define __PF(f,n) { ETH_P_##f, #n },
 static struct {
         int id;
-        char *name;
+        const char *name;
 } llproto_names[] = {
 __PF(LOOP,loop)
 __PF(PUP,pup)
diff --git a/networking/libiproute/rtm_map.c b/networking/libiproute/rtm_map.c
index 7eb4c7122..c16406b8b 100644
--- a/networking/libiproute/rtm_map.c
+++ b/networking/libiproute/rtm_map.c
@@ -13,11 +13,10 @@
 
 #include <stdlib.h>
 #include <string.h>
-
 #include "rt_names.h"
 #include "utils.h"
 
-char *rtnl_rtntype_n2a(int id, char *buf, int len)
+const char *rtnl_rtntype_n2a(int id, char *buf, int len)
 {
         switch (id) {
         case RTN_UNSPEC:
diff --git a/networking/libiproute/rtm_map.h b/networking/libiproute/rtm_map.h
index b9c8c503f..cbbcc214d 100644
--- a/networking/libiproute/rtm_map.h
+++ b/networking/libiproute/rtm_map.h
@@ -2,7 +2,7 @@
 #ifndef __RTM_MAP_H__
 #define __RTM_MAP_H__ 1
 
-char *rtnl_rtntype_n2a(int id, char *buf, int len);
+const char *rtnl_rtntype_n2a(int id, char *buf, int len);
 int rtnl_rtntype_a2n(int *id, char *arg);
 
 int get_rt_realms(uint32_t *realms, char *arg);
diff --git a/runit/sv.c b/runit/sv.c
index 6594e1451..6b154c1a8 100644
--- a/runit/sv.c
+++ b/runit/sv.c
@@ -7,33 +7,33 @@
 #include "runit_lib.h"
 
 static char *action;
-static char *acts;
-static char *varservice = "/var/service/";
+static const char *acts;
+static const char *varservice = "/var/service/";
 static char **service;
 static char **servicex;
 static unsigned services;
-static unsigned rc = 0;
-static unsigned verbose = 0;
+static unsigned rc;
+static unsigned verbose;
 static unsigned long waitsec = 7;
-static unsigned kll = 0;
+static unsigned kll;
 static struct taia tstart, tnow, tdiff;
 static struct tai tstatus;
 
-static int (*act)(char*) = 0;
-static int (*cbk)(char*) = 0;
+static int (*act)(const char*);
+static int (*cbk)(const char*);
 
 static int curdir, fd, r;
 static char svstatus[20];
 
 #define usage() bb_show_usage()
 
-static void fatal_cannot(char *m1)
+static void fatal_cannot(const char *m1)
 {
         bb_perror_msg("fatal: cannot %s", m1);
         _exit(151);
 }
 
-static void out(char *p, char *m1)
+static void out(const char *p, const char *m1)
 {
         printf("%s%s: %s", p, *service, m1);
         if (errno) {
@@ -51,15 +51,16 @@ static void out(char *p, char *m1)
 #define TIMEOUT "timeout: "
 #define KILL    "kill: "
 
-static void fail(char *m1) { ++rc; out(FAIL, m1); }
-static void failx(char *m1) { errno = 0; fail(m1); }
-static void warn_cannot(char *m1) { ++rc; out("warning: cannot ", m1); }
-static void warnx_cannot(char *m1) { errno = 0; warn_cannot(m1); }
-static void ok(char *m1) { errno = 0; out(OK, m1); }
+static void fail(const char *m1) { ++rc; out(FAIL, m1); }
+static void failx(const char *m1) { errno = 0; fail(m1); }
+static void warn_cannot(const char *m1) { ++rc; out("warning: cannot ", m1); }
+static void warnx_cannot(const char *m1) { errno = 0; warn_cannot(m1); }
+static void ok(const char *m1) { errno = 0; out(OK, m1); }
 
 static int svstatus_get(void)
 {
-        if ((fd = open_write("supervise/ok")) == -1) {
+        fd = open_write("supervise/ok");
+        if (fd == -1) {
                 if (errno == ENODEV) {
                         *acts == 'x' ? ok("runsv not running")
                                      : failx("runsv not running");
@@ -69,7 +70,8 @@ static int svstatus_get(void)
                 return -1;
         }
         close(fd);
-        if ((fd = open_read("supervise/status")) == -1) {
+        fd = open_read("supervise/status");
+        if (fd == -1) {
                 warn_cannot("open supervise/status");
                 return -1;
         }
@@ -83,7 +85,7 @@ static int svstatus_get(void)
         return 1;
 }
 
-static unsigned svstatus_print(char *m)
+static unsigned svstatus_print(const char *m)
 {
         int pid;
         int normallyup = 0;
@@ -121,7 +123,7 @@ static unsigned svstatus_print(char *m)
         return pid ? 1 : 2;
 }
 
-static int status(char *unused)
+static int status(const char *unused)
 {
         r = svstatus_get();
         switch (r) { case -1: case 0: return 0; }
@@ -156,8 +158,8 @@ static int checkscript(void)
                 return 0;
         }
         if (!pid) {
-                prog[0] = "./check";
-                prog[1] = 0;
+                prog[0] = (char*)"./check";
+                prog[1] = NULL;
                 close(1);
                 execve("check", prog, environ);
                 bb_perror_msg(WARN"cannot run %s/check", *service);
@@ -171,7 +173,7 @@ static int checkscript(void)
         return !wait_exitcode(w);
 }
 
-static int check(char *a)
+static int check(const char *a)
 {
         unsigned pid;
 
@@ -200,15 +202,18 @@ static int check(char *a)
                 if ((!pid && tstart.sec.x > tstatus.x) || (pid && svstatus[17] != 'd'))
                         return 0;
         }
-        printf(OK); svstatus_print(*service); puts(""); /* will also flush the output */
+        printf(OK);
+        svstatus_print(*service);
+        puts(""); /* will also flush the output */
         return 1;
 }
 
-static int control(char *a)
+static int control(const char *a)
 {
         if (svstatus_get() <= 0) return -1;
         if (svstatus[17] == *a) return 0;
-        if ((fd = open_write("supervise/control")) == -1) {
+        fd = open_write("supervise/control");
+        if (fd == -1) {
                 if (errno != ENODEV)
                         warn_cannot("open supervise/control");
                 else
@@ -245,15 +250,20 @@ int sv_main(int argc, char **argv)
         if (opt & 4) usage();
         if (!(action = *argv++)) usage();
         --argc;
-        service = argv; services = argc;
+        service = argv;
+        services = argc;
         if (!*service) usage();
 
-        taia_now(&tnow); tstart = tnow;
-        if ((curdir = open_read(".")) == -1)
+        taia_now(&tnow);
+        tstart = tnow;
+        curdir = open_read(".");
+        if (curdir == -1)
                 fatal_cannot("open current directory");
 
-        act = &control; acts = "s";
-        if (verbose) cbk = &check;
+        act = &control;
+        acts = "s";
+        if (verbose)
+                cbk = &check;
         switch (*action) {
         case 'x': case 'e':
                 acts = "x"; break;
@@ -289,7 +299,9 @@ int sv_main(int argc, char **argv)
                         cbk = &check;
                         break;
                 }
-                act = &status; cbk = 0; break;
+                act = &status;
+                cbk = NULL;
+                break;
         case 'r':
                 if (!str_diff(action, "restart")) {
                         acts = "tcu";