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-rw-r--r--lib/erl_interface/src/prog/erl_call.c134
1 files changed, 95 insertions, 39 deletions
diff --git a/lib/erl_interface/src/prog/erl_call.c b/lib/erl_interface/src/prog/erl_call.c
index 93b84cbb36..448de9aa23 100644
--- a/lib/erl_interface/src/prog/erl_call.c
+++ b/lib/erl_interface/src/prog/erl_call.c
@@ -123,6 +123,10 @@ static int do_connect(ei_cnode *ec, char *nodename, struct call_flags *flags);
static int read_stdin(char **buf);
static void split_apply_string(char *str, char **mod,
char **fun, char **args);
+static void* ei_chk_malloc(size_t size);
+static void* ei_chk_calloc(size_t nmemb, size_t size);
+static void* ei_chk_realloc(void *old, size_t size);
+static char* ei_chk_strdup(char *s);
/***************************************************************************
@@ -132,7 +136,6 @@ static void split_apply_string(char *str, char **mod,
***************************************************************************/
/* FIXME isn't VxWorks to handle arguments differently? */
-/* FIXME check errors from malloc */
#if !defined(VXWORKS)
int main(int argc, char *argv[])
@@ -165,8 +168,7 @@ int erl_call(int argc, char **argv)
usage_arg(progname, "-sname ");
}
- flags.node = (char *) malloc(strlen(argv[i+1]) + 1);
- strcpy(flags.node, argv[i+1]);
+ flags.node = ei_chk_strdup(argv[i+1]);
i++;
flags.use_long_name = 0;
} else if (strcmp(argv[i], "-name") == 0) { /* -name NAME */
@@ -174,8 +176,7 @@ int erl_call(int argc, char **argv)
usage_arg(progname, "-name ");
}
- flags.node = (char *) malloc(strlen(argv[i+1]) + 1);
- strcpy(flags.node, argv[i+1]);
+ flags.node = ei_chk_strdup(argv[i+1]);
i++;
flags.use_long_name = 1;
} else {
@@ -210,16 +211,14 @@ int erl_call(int argc, char **argv)
usage_arg(progname, "-c ");
}
flags.cookiep = 1;
- flags.cookie = (char *) malloc(strlen(argv[i+1]) + 1);
- strcpy(flags.cookie, argv[i+1]);
+ flags.cookie = ei_chk_strdup(argv[i+1]);
i++;
break;
case 'n':
if (i+1 >= argc) {
usage_arg(progname, "-n ");
}
- flags.node = (char *) malloc(strlen(argv[i+1]) + 1);
- strcpy(flags.node, argv[i+1]);
+ flags.node = ei_chk_strdup(argv[i+1]);
flags.use_long_name = 1;
i++;
break;
@@ -227,24 +226,21 @@ int erl_call(int argc, char **argv)
if (i+1 >= argc) {
usage_arg(progname, "-h ");
}
- flags.hidden = (char *) malloc(strlen(argv[i+1]) + 1);
- strcpy(flags.hidden, argv[i+1]);
+ flags.hidden = ei_chk_strdup(argv[i+1]);
i++;
break;
case 'x':
if (i+1 >= argc) {
usage_arg(progname, "-x ");
}
- flags.script = (char *) malloc(strlen(argv[i+1]) + 1);
- strcpy(flags.script, argv[i+1]);
+ flags.script = ei_chk_strdup(argv[i+1]);
i++;
break;
case 'a':
if (i+1 >= argc) {
usage_arg(progname, "-a ");
}
- flags.apply = (char *) malloc(strlen(argv[i+1]) + 1);
- strcpy(flags.apply, argv[i+1]);
+ flags.apply = ei_chk_strdup(argv[i+1]);
i++;
break;
case '?':
@@ -304,8 +300,7 @@ int erl_call(int argc, char **argv)
if (flags.hidden == NULL) {
/* As default we are c17@gethostname */
i = flags.randomp ? (time(NULL) % 997) : 17;
- /* FIXME allocates to small !!! */
- flags.hidden = (char *) malloc(3 + 2 ); /* c17 or cXYZ */
+ flags.hidden = (char *) ei_chk_malloc(10 + 2 ); /* c17 or cXYZ */
#if defined(VXWORKS)
sprintf(flags.hidden, "c%d",
i < 0 ? (int) taskIdSelf() : i);
@@ -330,17 +325,25 @@ int erl_call(int argc, char **argv)
initWinSock();
#endif
- gethostname(h_hostname, EI_MAXHOSTNAMELEN);
+ if (gethostname(h_hostname, EI_MAXHOSTNAMELEN) < 0) {
+ fprintf(stderr,"erl_call: failed to get host name: %d\n", errno);
+ exit(1);
+ }
if ((hp = ei_gethostbyname(h_hostname)) == 0) {
fprintf(stderr,"erl_call: can't resolve hostname %s\n", h_hostname);
exit(1);
}
- /* If shortnames cut of the name at first '.' */
+ /* If shortnames, cut off the name at first '.' */
if (flags.use_long_name == 0 && (ct = strchr(hp->h_name, '.')) != NULL) {
*ct = '\0';
}
- strcpy(h_hostname, hp->h_name);
+ strncpy(h_hostname, hp->h_name, EI_MAXHOSTNAMELEN);
+ h_hostname[EI_MAXHOSTNAMELEN] = '\0';
memcpy(&h_ipadr.s_addr, *hp->h_addr_list, sizeof(struct in_addr));
+ if (strlen(h_alivename) + strlen(h_hostname) + 2 > sizeof(h_nodename)) {
+ fprintf(stderr,"erl_call: hostname too long: %s\n", h_hostname);
+ exit(1);
+ }
sprintf(h_nodename, "%s@%s", h_alivename, h_hostname);
if (ei_connect_xinit(&ec, h_hostname, h_alivename, h_nodename,
@@ -368,11 +371,16 @@ int erl_call(int argc, char **argv)
fprintf(stderr,"erl_call: can't get_hostent(%s)\n", host);
exit(1);
}
- /* If shortnames cut of the name at first '.' */
+ /* If shortnames, cut off the name at first '.' */
if (flags.use_long_name == 0 && (ct = strchr(hp->h_name, '.')) != NULL) {
*ct = '\0';
}
- strcpy(host_name, hp->h_name);
+ strncpy(host_name, hp->h_name, EI_MAXHOSTNAMELEN);
+ host_name[EI_MAXHOSTNAMELEN] = '\0';
+ if (strlen(flags.node) + strlen(host_name) + 2 > sizeof(nodename)) {
+ fprintf(stderr,"erl_call: nodename too long: %s\n", flags.node);
+ exit(1);
+ }
sprintf(nodename, "%s@%s", flags.node, host_name);
/*
@@ -401,7 +409,7 @@ int erl_call(int argc, char **argv)
ei_encode_empty_list(NULL, &i);
- p = (char *)malloc(i);
+ p = (char *)ei_chk_malloc(i);
i = 0; /* Reset */
ei_encode_empty_list(p, &i);
@@ -426,6 +434,10 @@ int erl_call(int argc, char **argv)
if (flags.modp && (modname != NULL)) {
char fname[256];
+ if (strlen(modname) + 4 + 1 > sizeof(fname)) {
+ fprintf(stderr,"erl_call: module name too long: %s\n", modname);
+ exit(1);
+ }
strcpy(fname, modname);
strcat(fname, ".erl");
@@ -443,7 +455,7 @@ int erl_call(int argc, char **argv)
ei_encode_binary(NULL, &i, module, modsize);
ei_encode_empty_list(NULL, &i);
- p = (char *)malloc(i);
+ p = (char *)ei_chk_malloc(i);
i = 0; /* Reset */
ei_encode_list_header(p, &i, 2);
@@ -476,7 +488,7 @@ int erl_call(int argc, char **argv)
ei_encode_empty_list(NULL, &i);
ei_encode_empty_list(NULL, &i);
- p = (char *)malloc(i);
+ p = (char *)ei_chk_malloc(i);
i = 0; /* Reset */
ei_encode_list_header(p, &i, 2);
@@ -521,7 +533,7 @@ int erl_call(int argc, char **argv)
ei_encode_binary(NULL, &i, evalbuf, len);
ei_encode_empty_list(NULL, &i);
- p = (char *)malloc(i);
+ p = (char *)ei_chk_malloc(i);
i = 0; /* Reset */
ei_encode_list_header(p, &i, 1);
@@ -719,32 +731,28 @@ static void split_apply_string(char *str,
EAT(str);
len = str-begin;
- *mod = (char *) calloc(len + 1, sizeof(char));
+ *mod = (char *) ei_chk_calloc(len + 1, sizeof(char));
memcpy(*mod, begin, len);
SKIP_SPACE(str);
if (*str == '\0') {
- *fun = (char *) calloc(strlen(start)+1, sizeof(char));
- strcpy(*fun, start);
- *args = (char *) calloc(strlen(empty_list)+1, sizeof(char));
- strcpy(*args, empty_list);
+ *fun = ei_chk_strdup(start);
+ *args = ei_chk_strdup(empty_list);
return;
}
begin = str;
EAT(str);
len = str-begin;
- *fun = (char *) calloc(len + 1, sizeof(char));
+ *fun = (char *) ei_chk_calloc(len + 1, sizeof(char));
memcpy(*fun, begin, len);
SKIP_SPACE(str);
if (*str == '\0') {
- *args = (char *) calloc(strlen(empty_list)+1, sizeof(char));
- strcpy(*args, empty_list);
+ *args = ei_chk_strdup(empty_list);
return;
}
- *args = (char *) calloc(strlen(str) + 1, sizeof(char));
- strcpy(*args, str);
+ *args = ei_chk_strdup(str);
return;
@@ -760,7 +768,7 @@ static int read_stdin(char **buf)
int bsize = BUFSIZ;
int len = 0;
int i;
- char *tmp = (char *) malloc(bsize);
+ char *tmp = (char *) ei_chk_malloc(bsize);
while (1) {
if ((i = read(0, &tmp[len], bsize-len)) < 0) {
@@ -772,7 +780,7 @@ static int read_stdin(char **buf)
len += i;
if ((len+50) > bsize) {
bsize = len * 2;
- tmp = (char *) realloc(tmp, bsize);
+ tmp = (char *) ei_chk_realloc(tmp, bsize);
} else {
continue;
}
@@ -809,7 +817,7 @@ static int get_module(char **mbuf, char **mname)
}
} /* while */
i = tmp - start;
- *mname = (char *) calloc(i+1, sizeof(char));
+ *mname = (char *) ei_chk_calloc(i+1, sizeof(char));
memcpy(*mname, start, i);
}
if (*mbuf)
@@ -905,3 +913,51 @@ static void initWinSock(void)
}
}
#endif
+
+
+/***************************************************************************
+ *
+ * Utility functions
+ *
+ ***************************************************************************/
+
+static void* ei_chk_malloc(size_t size)
+{
+ void *p = malloc(size);
+ if (p == NULL) {
+ fprintf(stderr,"erl_call: insufficient memory\n");
+ exit(1);
+ }
+ return p;
+}
+
+static void* ei_chk_calloc(size_t nmemb, size_t size)
+{
+ void *p = calloc(nmemb, size);
+ if (p == NULL) {
+ fprintf(stderr,"erl_call: insufficient memory\n");
+ exit(1);
+ }
+ return p;
+}
+
+static void* ei_chk_realloc(void *old, size_t size)
+{
+ void *p = realloc(old, size);
+ if (!p) {
+ fprintf(stderr, "erl_call: cannot reallocate %u bytes of memory from %p\n",
+ (unsigned) size, old);
+ exit (1);
+ }
+ return p;
+}
+
+static char* ei_chk_strdup(char *s)
+{
+ char *p = strdup(s);
+ if (p == NULL) {
+ fprintf(stderr,"erl_call: insufficient memory\n");
+ exit(1);
+ }
+ return p;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 16:45:17 +0000