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In preparation for using clang's -Wcast-qual:

Browse Source 
Use __DECONST (instead of my own attempted re-invention) for the iov
parameters to jail_get/set(2).  Similarly remove the decost-ish hack
from execvp's argv, except the __DECONST is only added at very end.

While I'm at it, remove an unused variable and fix a comment typo.
This commit is contained in:
Jamie Gritton 2014-11-25 21:01:08 +00:00
parent 52e05d9a24
commit d031802b05
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=275073
5 changed files with 72 additions and 74 deletions
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4
lib/libjail/jail.c
View File

@ -531,7 +531,7 @@ jailparam_set(struct jailparam *jp, unsigned njp, int flags)
}
i++;
}
*(const void **)&jiov[i].iov_base = "errmsg";
jiov[i].iov_base = __DECONST(char *, "errmsg");
jiov[i].iov_len = sizeof("errmsg");
i++;
jiov[i].iov_base = jail_errmsg;
@ -601,7 +601,7 @@ jailparam_get(struct jailparam *jp, unsigned njp, int flags)
jiov[ki].iov_len = (jp_key->jp_ctltype & CTLTYPE) == CTLTYPE_STRING
? strlen(jp_key->jp_value) + 1 : jp_key->jp_valuelen;
ki++;
*(const void **)&jiov[ki].iov_base = "errmsg";
jiov[ki].iov_base = __DECONST(char *, "errmsg");
jiov[ki].iov_len = sizeof("errmsg");
ki++;
jiov[ki].iov_base = jail_errmsg;

10
lib/libjail/jail_getid.c
View File

@ -53,12 +53,12 @@ jail_getid(const char *name)
jid = strtoul(name, &ep, 10);
if (*name && !*ep)
return jid;
*(const void **)&jiov[0].iov_base = "name";
jiov[0].iov_base = __DECONST(char *, "name");
jiov[0].iov_len = sizeof("name");
jiov[1].iov_len = strlen(name) + 1;
jiov[1].iov_base = alloca(jiov[1].iov_len);
strcpy(jiov[1].iov_base, name);
*(const void **)&jiov[2].iov_base = "errmsg";
jiov[2].iov_base = __DECONST(char *, "errmsg");
jiov[2].iov_len = sizeof("errmsg");
jiov[3].iov_base = jail_errmsg;
jiov[3].iov_len = JAIL_ERRMSGLEN;
@ -80,15 +80,15 @@ jail_getname(int jid)
char *name;
char namebuf[MAXHOSTNAMELEN];
*(const void **)&jiov[0].iov_base = "jid";
jiov[0].iov_base = __DECONST(char *, "jid");
jiov[0].iov_len = sizeof("jid");
jiov[1].iov_base = &jid;
jiov[1].iov_len = sizeof(jid);
*(const void **)&jiov[2].iov_base = "name";
jiov[2].iov_base = __DECONST(char *, "name");
jiov[2].iov_len = sizeof("name");
jiov[3].iov_base = namebuf;
jiov[3].iov_len = sizeof(namebuf);
*(const void **)&jiov[4].iov_base = "errmsg";
jiov[4].iov_base = __DECONST(char *, "errmsg");
jiov[4].iov_len = sizeof("errmsg");
jiov[5].iov_base = jail_errmsg;
jiov[5].iov_len = JAIL_ERRMSGLEN;

105
usr.sbin/jail/command.c
View File

@ -260,8 +260,8 @@ run_command(struct cfjail *j)
const struct passwd *pwd;
const struct cfstring *comstring, *s;
login_cap_t *lcap;
char **argv;
char *cs, *comcs, *devpath;
const char **argv;
char *acs, *cs, *comcs, *devpath;
const char *jidstr, *conslog, *path, *ruleset, *term, *username;
enum intparam comparam;
size_t comlen;
@ -332,27 +332,26 @@ run_command(struct cfjail *j)
}
argv = alloca((8 + argc) * sizeof(char *));
*(const char **)&argv[0] = _PATH_IFCONFIG;
argv[0] = _PATH_IFCONFIG;
if ((cs = strchr(val, '|'))) {
argv[1] = alloca(cs - val + 1);
strlcpy(argv[1], val, cs - val + 1);
argv[1] = acs = alloca(cs - val + 1);
strlcpy(acs, val, cs - val + 1);
addr = cs + 1;
} else {
*(const char **)&argv[1] =
string_param(j->intparams[IP_INTERFACE]);
argv[1] = string_param(j->intparams[IP_INTERFACE]);
addr = val;
}
*(const char **)&argv[2] = "inet";
argv[2] = "inet";
if (!(cs = strchr(addr, '/'))) {
argv[3] = addr;
*(const char **)&argv[4] = "netmask";
*(const char **)&argv[5] = "255.255.255.255";
argv[4] = "netmask";
argv[5] = "255.255.255.255";
argc = 6;
} else if (strchr(cs + 1, '.')) {
argv[3] = alloca(cs - addr + 1);
strlcpy(argv[3], addr, cs - addr + 1);
*(const char **)&argv[4] = "netmask";
*(const char **)&argv[5] = cs + 1;
argv[3] = acs = alloca(cs - addr + 1);
strlcpy(acs, addr, cs - addr + 1);
argv[4] = "netmask";
argv[5] = cs + 1;
argc = 6;
} else {
argv[3] = addr;
@ -360,14 +359,15 @@ run_command(struct cfjail *j)
}
if (!down) {
for (cs = strtok(extrap, " "); cs; cs = strtok(NULL, " ")) {
for (cs = strtok(extrap, " "); cs;
cs = strtok(NULL, " ")) {
size_t len = strlen(cs) + 1;
argv[argc] = alloca(len);
strlcpy(argv[argc++], cs, len);
argv[argc++] = acs = alloca(len);
strlcpy(acs, cs, len);
}
}
*(const char **)&argv[argc] = down ? "-alias" : "alias";
argv[argc] = down ? "-alias" : "alias";
argv[argc + 1] = NULL;
break;
#endif
@ -389,46 +389,45 @@ run_command(struct cfjail *j)
}
argv = alloca((8 + argc) * sizeof(char *));
*(const char **)&argv[0] = _PATH_IFCONFIG;
argv[0] = _PATH_IFCONFIG;
if ((cs = strchr(val, '|'))) {
argv[1] = alloca(cs - val + 1);
strlcpy(argv[1], val, cs - val + 1);
argv[1] = acs = alloca(cs - val + 1);
strlcpy(acs, val, cs - val + 1);
addr = cs + 1;
} else {
*(const char **)&argv[1] =
string_param(j->intparams[IP_INTERFACE]);
argv[1] = string_param(j->intparams[IP_INTERFACE]);
addr = val;
}
*(const char **)&argv[2] = "inet6";
argv[2] = "inet6";
argv[3] = addr;
if (!(cs = strchr(addr, '/'))) {
*(const char **)&argv[4] = "prefixlen";
*(const char **)&argv[5] = "128";
argv[4] = "prefixlen";
argv[5] = "128";
argc = 6;
} else
argc = 4;
if (!down) {
for (cs = strtok(extrap, " "); cs; cs = strtok(NULL, " ")) {
for (cs = strtok(extrap, " "); cs;
cs = strtok(NULL, " ")) {
size_t len = strlen(cs) + 1;
argv[argc] = alloca(len);
strlcpy(argv[argc++], cs, len);
argv[argc++] = acs = alloca(len);
strlcpy(acs, cs, len);
}
}
*(const char **)&argv[argc] = down ? "-alias" : "alias";
argv[argc] = down ? "-alias" : "alias";
argv[argc + 1] = NULL;
break;
#endif
case IP_VNET_INTERFACE:
argv = alloca(5 * sizeof(char *));
*(const char **)&argv[0] = _PATH_IFCONFIG;
argv[0] = _PATH_IFCONFIG;
argv[1] = comstring->s;
*(const char **)&argv[2] = down ? "-vnet" : "vnet";
argv[2] = down ? "-vnet" : "vnet";
jidstr = string_param(j->intparams[KP_JID]);
*(const char **)&argv[3] =
jidstr ? jidstr : string_param(j->intparams[KP_NAME]);
argv[3] = jidstr ? jidstr : string_param(j->intparams[KP_NAME]);
argv[4] = NULL;
break;
@ -454,22 +453,22 @@ run_command(struct cfjail *j)
if (down) {
argv[4] = NULL;
argv[3] = argv[1];
*(const char **)&argv[0] = "/sbin/umount";
argv[0] = "/sbin/umount";
} else {
if (argc == 4) {
argv[7] = NULL;
argv[6] = argv[1];
argv[5] = argv[0];
argv[4] = argv[3];
*(const char **)&argv[3] = "-o";
argv[3] = "-o";
} else {
argv[5] = NULL;
argv[4] = argv[1];
argv[3] = argv[0];
}
*(const char **)&argv[0] = _PATH_MOUNT;
argv[0] = _PATH_MOUNT;
}
*(const char **)&argv[1] = "-t";
argv[1] = "-t";
break;
case IP_MOUNT_DEVFS:
@ -485,19 +484,19 @@ run_command(struct cfjail *j)
down ? "devfs" : NULL) < 0)
return -1;
if (down) {
*(const char **)&argv[0] = "/sbin/umount";
argv[0] = "/sbin/umount";
argv[1] = devpath;
argv[2] = NULL;
} else {
*(const char **)&argv[0] = _PATH_MOUNT;
*(const char **)&argv[1] = "-t";
*(const char **)&argv[2] = "devfs";
argv[0] = _PATH_MOUNT;
argv[1] = "-t";
argv[2] = "devfs";
ruleset = string_param(j->intparams[KP_DEVFS_RULESET]);
if (!ruleset)
ruleset = "4"; /* devfsrules_jail */
argv[3] = alloca(11 + strlen(ruleset));
sprintf(argv[3], "-oruleset=%s", ruleset);
*(const char **)&argv[4] = ".";
argv[3] = acs = alloca(11 + strlen(ruleset));
sprintf(acs, "-oruleset=%s", ruleset);
argv[4] = ".";
argv[5] = devpath;
argv[6] = NULL;
}
@ -516,14 +515,14 @@ run_command(struct cfjail *j)
down ? "fdescfs" : NULL) < 0)
return -1;
if (down) {
*(const char **)&argv[0] = "/sbin/umount";
argv[0] = "/sbin/umount";
argv[1] = devpath;
argv[2] = NULL;
} else {
*(const char **)&argv[0] = _PATH_MOUNT;
*(const char **)&argv[1] = "-t";
*(const char **)&argv[2] = "fdescfs";
*(const char **)&argv[3] = ".";
argv[0] = _PATH_MOUNT;
argv[1] = "-t";
argv[2] = "fdescfs";
argv[3] = ".";
argv[4] = devpath;
argv[5] = NULL;
}
@ -548,8 +547,8 @@ run_command(struct cfjail *j)
if ((cs = strpbrk(comstring->s, "!\"$&'()*;<>?[\\]`{|}~")) &&
!(cs[0] == '&' && cs[1] == '\0')) {
argv = alloca(4 * sizeof(char *));
*(const char **)&argv[0] = _PATH_BSHELL;
*(const char **)&argv[1] = "-c";
argv[0] = _PATH_BSHELL;
argv[1] = "-c";
argv[2] = comstring->s;
argv[3] = NULL;
} else {
@ -693,7 +692,7 @@ run_command(struct cfjail *j)
exit(1);
}
closefrom(3);
execvp(argv[0], argv);
execvp(argv[0], __DECONST(char *const*, argv));
jail_warnx(j, "exec %s: %s", argv[0], strerror(errno));
exit(1);
}

14
usr.sbin/jail/jail.c
View File

@ -656,11 +656,11 @@ create_jail(struct cfjail *j)
* The jail already exists, but may be dying.
* Make sure it is, in which case an update is appropriate.
*/
*(const void **)&jiov[0].iov_base = "jid";
jiov[0].iov_base = __DECONST(char *, "jid");
jiov[0].iov_len = sizeof("jid");
jiov[1].iov_base = &jid;
jiov[1].iov_len = sizeof(jid);
*(const void **)&jiov[2].iov_base = "dying";
jiov[2].iov_base = __DECONST(char *, "dying");
jiov[2].iov_len = sizeof("dying");
jiov[3].iov_base = &dying;
jiov[3].iov_len = sizeof(dying);
@ -721,11 +721,11 @@ clear_persist(struct cfjail *j)
if (!(j->flags & JF_PERSIST))
return;
j->flags &= ~JF_PERSIST;
*(const void **)&jiov[0].iov_base = "jid";
jiov[0].iov_base = __DECONST(char *, "jid");
jiov[0].iov_len = sizeof("jid");
jiov[1].iov_base = &j->jid;
jiov[1].iov_len = sizeof(j->jid);
*(const void **)&jiov[2].iov_base = "nopersist";
jiov[2].iov_base = __DECONST(char *, "nopersist");
jiov[2].iov_len = sizeof("nopersist");
jiov[3].iov_base = NULL;
jiov[3].iov_len = 0;
@ -849,12 +849,12 @@ running_jid(struct cfjail *j, int dflag)
j->jid = -1;
return;
}
*(const void **)&jiov[0].iov_base = "jid";
jiov[0].iov_base = __DECONST(char *, "jid");
jiov[0].iov_len = sizeof("jid");
jiov[1].iov_base = &jid;
jiov[1].iov_len = sizeof(jid);
} else if ((pval = string_param(j->intparams[KP_NAME]))) {
*(const void **)&jiov[0].iov_base = "name";
jiov[0].iov_base = __DECONST(char *, "name");
jiov[0].iov_len = sizeof("name");
jiov[1].iov_len = strlen(pval) + 1;
jiov[1].iov_base = alloca(jiov[1].iov_len);
@ -880,7 +880,7 @@ jail_quoted_warnx(const struct cfjail *j, const char *name_msg,
}
/*
* Set jail parameters and possible print them out.
* Set jail parameters and possibly print them out.
*/
static int
jailparam_set_note(const struct cfjail *j, struct jailparam *jp, unsigned njp,

13
usr.sbin/jail/state.c
View File

@ -60,7 +60,7 @@ dep_setup(int docf)
const char *cs;
char *pname;
size_t plen;
int error, deps, ldeps;
int deps, ldeps;
if (!docf) {
/*
@ -88,7 +88,6 @@ dep_setup(int docf)
TAILQ_FOREACH(j, &cfjails, tq)
jails_byname[njails++] = j;
qsort(jails_byname, njails, sizeof(struct cfjail *), cmp_jailptr);
error = 0;
deps = 0;
ldeps = 0;
plen = 0;
@ -331,15 +330,15 @@ start_state(const char *target, int docf, unsigned state, int running)
* -R matches its wildcards against currently running
* jails, not against the config file.
*/
*(const void **)&jiov[0].iov_base = "lastjid";
jiov[0].iov_base = __DECONST(char *, "lastjid");
jiov[0].iov_len = sizeof("lastjid");
jiov[1].iov_base = &jid;
jiov[1].iov_len = sizeof(jid);
*(const void **)&jiov[2].iov_base = "jid";
jiov[2].iov_base = __DECONST(char *, "jid");
jiov[2].iov_len = sizeof("jid");
jiov[3].iov_base = &jid;
jiov[3].iov_len = sizeof(jid);
*(const void **)&jiov[4].iov_base = "name";
jiov[4].iov_base = __DECONST(char *, "name");
jiov[4].iov_len = sizeof("name");
jiov[5].iov_base = &namebuf;
jiov[5].iov_len = sizeof(namebuf);
@ -454,12 +453,12 @@ running_jid(const char *name, int flags)
int jid;
if ((jid = strtol(name, &ep, 10)) && !*ep) {
*(const void **)&jiov[0].iov_base = "jid";
jiov[0].iov_base = __DECONST(char *, "jid");
jiov[0].iov_len = sizeof("jid");
jiov[1].iov_base = &jid;
jiov[1].iov_len = sizeof(jid);
} else {
*(const void **)&jiov[0].iov_base = "name";
jiov[0].iov_base = __DECONST(char *, "name");
jiov[0].iov_len = sizeof("name");
jiov[1].iov_len = strlen(name) + 1;
jiov[1].iov_base = alloca(jiov[1].iov_len);