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Remember to delete un-expandable variables, and do a better job of expanding

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shell-specific things in case the wordexp implementation is broken (ie. the
stubbed out wordexp in uClibc).
 -Erik
This commit is contained in:
Eric Andersen 2001-03-08 17:44:37 +00:00
parent ca6045955d
commit 32f8c170b0
3 changed files with 84 additions and 18 deletions
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34
lash.c
View File

@ -959,15 +959,29 @@ static int expand_arguments(char *command)
else else
var = itoa(last_bg_pid); var = itoa(last_bg_pid);
break; break;
#if 0 /* Everything else like $$, $#, $[0-9], etc should all be
/* Everything else like $$, $#, $[0-9], etcshould all be * expanded by wordexp(), so we can in theory skip that stuff
* expanded by wordexp(), so we can skip that stuff here */ * here, but just to be on the safe side (i.e. since uClibc
* wordexp doesn't do this stuff yet), lets leave it in for
* now. */
case '$': case '$':
var = itoa(getpid());
break;
case '#': case '#':
var = itoa(argc-1);
break;
case '0':case '1':case '2':case '3':case '4': case '0':case '1':case '2':case '3':case '4':
case '5':case '6':case '7':case '8':case '9': case '5':case '6':case '7':case '8':case '9':
{
int index=*(dst + 1)-48;
if (index >= argc) {
var='\0';
} else {
var = argv[index];
}
}
break; break;
#endif
} }
} }
if (var) { if (var) {
@ -982,9 +996,17 @@ static int expand_arguments(char *command)
memmove(dst+subst_len, next_dst+1, subst_len); memmove(dst+subst_len, next_dst+1, subst_len);
/* Now copy in the new stuff */ /* Now copy in the new stuff */
strncpy(dst, var, subst_len); strncpy(dst, var, subst_len);
src = dst;
src++;
} else {
/* Seems we got an un-expandable variable. So delete it. */
char *next_dst;
if ((next_dst=strpbrk(dst+1, " \t~`!$^&*()=|\\{}[];\"'<>?")) != NULL) {
/* Move stuff to the end of the string to accommodate filling
* the created gap with the new stuff */
memmove(dst, next_dst, next_dst-dst);
}
} }
src = dst;
src++;
} }

34
sh.c
View File

@ -959,15 +959,29 @@ static int expand_arguments(char *command)
else else
var = itoa(last_bg_pid); var = itoa(last_bg_pid);
break; break;
#if 0 /* Everything else like $$, $#, $[0-9], etc should all be
/* Everything else like $$, $#, $[0-9], etcshould all be * expanded by wordexp(), so we can in theory skip that stuff
* expanded by wordexp(), so we can skip that stuff here */ * here, but just to be on the safe side (i.e. since uClibc
* wordexp doesn't do this stuff yet), lets leave it in for
* now. */
case '$': case '$':
var = itoa(getpid());
break;
case '#': case '#':
var = itoa(argc-1);
break;
case '0':case '1':case '2':case '3':case '4': case '0':case '1':case '2':case '3':case '4':
case '5':case '6':case '7':case '8':case '9': case '5':case '6':case '7':case '8':case '9':
{
int index=*(dst + 1)-48;
if (index >= argc) {
var='\0';
} else {
var = argv[index];
}
}
break; break;
#endif
} }
} }
if (var) { if (var) {
@ -982,9 +996,17 @@ static int expand_arguments(char *command)
memmove(dst+subst_len, next_dst+1, subst_len); memmove(dst+subst_len, next_dst+1, subst_len);
/* Now copy in the new stuff */ /* Now copy in the new stuff */
strncpy(dst, var, subst_len); strncpy(dst, var, subst_len);
src = dst;
src++;
} else {
/* Seems we got an un-expandable variable. So delete it. */
char *next_dst;
if ((next_dst=strpbrk(dst+1, " \t~`!$^&*()=|\\{}[];\"'<>?")) != NULL) {
/* Move stuff to the end of the string to accommodate filling
* the created gap with the new stuff */
memmove(dst, next_dst, next_dst-dst);
}
} }
src = dst;
src++;
} }

34
shell/lash.c
View File

@ -959,15 +959,29 @@ static int expand_arguments(char *command)
else else
var = itoa(last_bg_pid); var = itoa(last_bg_pid);
break; break;
#if 0 /* Everything else like $$, $#, $[0-9], etc should all be
/* Everything else like $$, $#, $[0-9], etcshould all be * expanded by wordexp(), so we can in theory skip that stuff
* expanded by wordexp(), so we can skip that stuff here */ * here, but just to be on the safe side (i.e. since uClibc
* wordexp doesn't do this stuff yet), lets leave it in for
* now. */
case '$': case '$':
var = itoa(getpid());
break;
case '#': case '#':
var = itoa(argc-1);
break;
case '0':case '1':case '2':case '3':case '4': case '0':case '1':case '2':case '3':case '4':
case '5':case '6':case '7':case '8':case '9': case '5':case '6':case '7':case '8':case '9':
{
int index=*(dst + 1)-48;
if (index >= argc) {
var='\0';
} else {
var = argv[index];
}
}
break; break;
#endif
} }
} }
if (var) { if (var) {
@ -982,9 +996,17 @@ static int expand_arguments(char *command)
memmove(dst+subst_len, next_dst+1, subst_len); memmove(dst+subst_len, next_dst+1, subst_len);
/* Now copy in the new stuff */ /* Now copy in the new stuff */
strncpy(dst, var, subst_len); strncpy(dst, var, subst_len);
src = dst;
src++;
} else {
/* Seems we got an un-expandable variable. So delete it. */
char *next_dst;
if ((next_dst=strpbrk(dst+1, " \t~`!$^&*()=|\\{}[];\"'<>?")) != NULL) {
/* Move stuff to the end of the string to accommodate filling
* the created gap with the new stuff */
memmove(dst, next_dst, next_dst-dst);
}
} }
src = dst;
src++;
} }