88 lines
2.6 KiB
Diff
88 lines
2.6 KiB
Diff
diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c
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index 187a8c0..eeb8545 100644
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--- a/tools/env/fw_env.c
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+++ b/tools/env/fw_env.c
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@@ -165,8 +165,15 @@ static char *fw_string_blank(char *s, int noblank)
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char *fw_getenv (char *name)
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{
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char *env, *nxt;
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+ for (nxt = env = environment.data; !(*nxt); ++nxt) {
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+ if (nxt >= &environment.data[ENV_SIZE]) {
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+ fprintf (stderr, "## Error: "
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+ "environment is empty\n");
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+ return NULL;
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+ }
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+ }
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- for (env = environment.data; *env; env = nxt + 1) {
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+ for (env = nxt; *env; env = nxt + 1) {
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char *val;
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for (nxt = env; *nxt; ++nxt) {
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@@ -191,8 +198,15 @@ char *fw_getenv (char *name)
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char *fw_getdefenv(char *name)
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{
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char *env, *nxt;
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+ for (nxt = env = default_environment; !(*nxt); ++nxt) {
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+ if (nxt >= &default_environment[ENV_SIZE]) {
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+ fprintf (stderr, "## Error: "
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+ "default environment is empty\n");
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+ return NULL;
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+ }
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+ }
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- for (env = default_environment; *env; env = nxt + 1) {
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+ for (env = nxt; *env; env = nxt + 1) {
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char *val;
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for (nxt = env; *nxt; ++nxt) {
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@@ -267,7 +281,14 @@ int fw_printenv (int argc, char *argv[])
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return -1;
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if (argc == 1) { /* Print all env variables */
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- for (env = environment.data; *env; env = nxt + 1) {
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+ for (nxt = env = environment.data; !(*nxt); ++nxt) {
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+ if (nxt >= &environment.data[ENV_SIZE]) {
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+ fprintf (stderr, "## Error: "
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+ "environment is empty\n");
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+ return -1;
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+ }
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+ }
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+ for (env = nxt; *env; env = nxt + 1) {
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &environment.data[ENV_SIZE]) {
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fprintf (stderr, "## Error: "
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@@ -298,8 +319,14 @@ int fw_printenv (int argc, char *argv[])
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char *name = argv[i];
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char *val = NULL;
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- for (env = environment.data; *env; env = nxt + 1) {
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-
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+ for (nxt = env = environment.data; !(*nxt); ++nxt) {
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+ if (nxt >= &environment.data[ENV_SIZE]) {
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+ fprintf (stderr, "## Error: "
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+ "environment is empty\n");
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+ return -1;
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+ }
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+ }
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+ for (env = nxt; *env; env = nxt + 1) {
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &environment.data[ENV_SIZE]) {
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fprintf (stderr, "## Error: "
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@@ -369,7 +396,14 @@ int fw_env_write(char *name, char *value)
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/*
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* search if variable with this name already exists
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*/
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- for (nxt = env = environment.data; *env; env = nxt + 1) {
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+ for (nxt = env = environment.data; !(*nxt); ++nxt) {
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+ if (nxt >= &environment.data[ENV_SIZE]) {
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+ fprintf (stderr, "## Error: "
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+ "environment is empty\n");
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+ return -1;
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+ }
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+ }
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+ for (env = nxt; *env; env = nxt + 1) {
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &environment.data[ENV_SIZE]) {
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fprintf(stderr, "## Error: "
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