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hush: fix segfault in "echo $@" when we have no arguments

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This commit is contained in:
Denis Vlasenko 2007-11-24 00:22:42 +00:00
parent d2023283ac
commit c3c6659f12
1 changed files with 6 additions and 4 deletions
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10
shell/hush.c
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@ -2468,7 +2468,7 @@ static void count_var_expansion_space(int *countp, int *lenp, char *arg)
break;
case '*':
case '@':
for (i = 1; i < global_argc; i++) {
for (i = 1; global_argv[i]; i++) {
len += strlen(global_argv[i]) + 1;
count++;
if (!(first_ch & 0x80))
@ -2581,11 +2581,13 @@ static int expand_vars_to_list(char **list, int n, char **posp, char *arg, char
case '*':
case '@':
i = 1;
if (!global_argv[i])
break;
if (!(first_ch & 0x80)) { /* unquoted $* or $@ */
while (i < global_argc) {
while (global_argv[i]) {
n = expand_on_ifs(list, n, &pos, global_argv[i]);
debug_printf_expand("expand_vars_to_list: argv %d (last %d)\n", i, global_argc-1);
if (global_argv[i++][0] && i < global_argc) {
if (global_argv[i++][0] && global_argv[i]) {
/* this argv[] is not empty and not last:
* put terminating NUL, start new word */
*pos++ = '\0';
@ -2611,7 +2613,7 @@ static int expand_vars_to_list(char **list, int n, char **posp, char *arg, char
list[n++] = pos;
}
} else { /* quoted $*: add as one word */
if (global_argv[i]) while (1) {
while (1) {
strcpy(pos, global_argv[i]);
pos += strlen(global_argv[i]);
if (!global_argv[++i])