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hush: preparatory patch for NOMMU-safe { list } handling.

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function                                             old     new   delta
o_addblock                                             -      58     +58
o_addstr_with_NUL                                      -      27     +27
builtin_exit                                          47      49      +2
run_list                                            2020    2018      -2
o_addstrauto                                          27       -     -27
parse_stream                                        1508    1461     -47
o_addstr                                              58       -     -58
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 1/2 up/down: 87/-134)           Total: -47 bytes
This commit is contained in:
Denis Vlasenko 2009-04-04 22:47:50 +00:00
parent 42e78b978f
commit 9aa7d6fdc5
1 changed files with 200 additions and 91 deletions
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291
shell/hush.c
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@ -73,10 +73,18 @@
#if ENABLE_HUSH_CASE #if ENABLE_HUSH_CASE
#include <fnmatch.h> #include <fnmatch.h>
#endif #endif
#include "math.h" #include "math.h"
#define HUSH_VER_STR "0.92" #ifdef WANT_TO_TEST_NOMMU
# undef BB_MMU
# undef USE_FOR_NOMMU
# undef USE_FOR_MMU
# define BB_MMU 0
# define USE_FOR_NOMMU(...) __VA_ARGS__
# define USE_FOR_MMU(...)
#endif
#define HUSH_VER_STR "0.93"
#if defined SINGLE_APPLET_MAIN #if defined SINGLE_APPLET_MAIN
/* STANDALONE does not make sense, and won't compile */ /* STANDALONE does not make sense, and won't compile */
@ -298,6 +306,45 @@ typedef enum reserved_style {
RES_SNTX RES_SNTX
} reserved_style; } reserved_style;
typedef struct o_string {
char *data;
int length; /* position where data is appended */
int maxlen;
/* Protect newly added chars against globbing
* (by prepending \ to *, ?, [, \) */
smallint o_escape;
smallint o_glob;
smallint nonnull;
smallint has_empty_slot;
smallint o_assignment; /* 0:maybe, 1:yes, 2:no */
} o_string;
enum {
MAYBE_ASSIGNMENT = 0,
DEFINITELY_ASSIGNMENT = 1,
NOT_ASSIGNMENT = 2,
WORD_IS_KEYWORD = 3, /* not assigment, but next word may be: "if v=xyz cmd;" */
};
/* Used for initialization: o_string foo = NULL_O_STRING; */
#define NULL_O_STRING { NULL }
/* I can almost use ordinary FILE*. Is open_memstream() universally
* available? Where is it documented? */
typedef struct in_str {
const char *p;
/* eof_flag=1: last char in ->p is really an EOF */
char eof_flag; /* meaningless if ->p == NULL */
char peek_buf[2];
#if ENABLE_HUSH_INTERACTIVE
smallint promptme;
smallint promptmode; /* 0: PS1, 1: PS2 */
#endif
FILE *file;
int (*get) (struct in_str *);
int (*peek) (struct in_str *);
} in_str;
#define i_getch(input) ((input)->get(input))
#define i_peek(input) ((input)->peek(input))
struct redir_struct { struct redir_struct {
struct redir_struct *next; struct redir_struct *next;
char *rd_filename; /* filename */ char *rd_filename; /* filename */
@ -311,8 +358,11 @@ struct command {
int assignment_cnt; /* how many argv[i] are assignments? */ int assignment_cnt; /* how many argv[i] are assignments? */
smallint is_stopped; /* is the command currently running? */ smallint is_stopped; /* is the command currently running? */
smallint grp_type; /* GRP_xxx */ smallint grp_type; /* GRP_xxx */
struct pipe *group; /* if non-NULL, this "prog" is {} group, struct pipe *group; /* if non-NULL, this "command" is { list },
* subshell, or a compound statement */ * ( list ), or a compound statement */
#if !BB_MMU
char *group_as_string;
#endif
char **argv; /* command name and arguments */ char **argv; /* command name and arguments */
struct redir_struct *redirects; /* I/O redirections */ struct redir_struct *redirects; /* I/O redirections */
}; };
@ -354,6 +404,9 @@ struct parse_context {
struct command *command; struct command *command;
/* last redirect in command->redirects list */ /* last redirect in command->redirects list */
struct redir_struct *pending_redirect; struct redir_struct *pending_redirect;
#if !BB_MMU
o_string as_string;
#endif
#if HAS_KEYWORDS #if HAS_KEYWORDS
smallint ctx_res_w; smallint ctx_res_w;
smallint ctx_inverted; /* "! cmd | cmd" */ smallint ctx_inverted; /* "! cmd | cmd" */
@ -389,45 +442,6 @@ struct variable {
smallint flg_read_only; smallint flg_read_only;
}; };
typedef struct o_string {
char *data;
int length; /* position where data is appended */
int maxlen;
/* Protect newly added chars against globbing
* (by prepending \ to *, ?, [, \) */
smallint o_escape;
smallint o_glob;
smallint nonnull;
smallint has_empty_slot;
smallint o_assignment; /* 0:maybe, 1:yes, 2:no */
} o_string;
enum {
MAYBE_ASSIGNMENT = 0,
DEFINITELY_ASSIGNMENT = 1,
NOT_ASSIGNMENT = 2,
WORD_IS_KEYWORD = 3, /* not assigment, but next word may be: "if v=xyz cmd;" */
};
/* Used for initialization: o_string foo = NULL_O_STRING; */
#define NULL_O_STRING { NULL }
/* I can almost use ordinary FILE*. Is open_memstream() universally
* available? Where is it documented? */
typedef struct in_str {
const char *p;
/* eof_flag=1: last char in ->p is really an EOF */
char eof_flag; /* meaningless if ->p == NULL */
char peek_buf[2];
#if ENABLE_HUSH_INTERACTIVE
smallint promptme;
smallint promptmode; /* 0: PS1, 1: PS2 */
#endif
FILE *file;
int (*get) (struct in_str *);
int (*peek) (struct in_str *);
} in_str;
#define i_getch(input) ((input)->get(input))
#define i_peek(input) ((input)->peek(input))
enum { enum {
BC_BREAK = 1, BC_BREAK = 1,
BC_CONTINUE = 2, BC_CONTINUE = 2,
@ -1359,6 +1373,11 @@ static void o_free(o_string *o)
memset(o, 0, sizeof(*o)); memset(o, 0, sizeof(*o));
} }
static ALWAYS_INLINE void o_free_unsafe(o_string *o)
{
free(o->data);
}
static void o_grow_by(o_string *o, int len) static void o_grow_by(o_string *o, int len)
{ {
if (o->length + len > o->maxlen) { if (o->length + len > o->maxlen) {
@ -1376,7 +1395,7 @@ static void o_addchr(o_string *o, int ch)
o->data[o->length] = '\0'; o->data[o->length] = '\0';
} }
static void o_addstr(o_string *o, const char *str, int len) static void o_addblock(o_string *o, const char *str, int len)
{ {
o_grow_by(o, len); o_grow_by(o, len);
memcpy(&o->data[o->length], str, len); memcpy(&o->data[o->length], str, len);
@ -1384,12 +1403,19 @@ static void o_addstr(o_string *o, const char *str, int len)
o->data[o->length] = '\0'; o->data[o->length] = '\0';
} }
static void o_addstrauto(o_string *o, const char *str) #if !BB_MMU
static void o_addstr(o_string *o, const char *str)
{ {
o_addstr(o, str, strlen(str) + 1); o_addblock(o, str, strlen(str));
}
#endif
static void o_addstr_with_NUL(o_string *o, const char *str)
{
o_addblock(o, str, strlen(str) + 1);
} }
static void o_addstr_duplicate_backslash(o_string *o, const char *str, int len) static void o_addblock_duplicate_backslash(o_string *o, const char *str, int len)
{ {
while (len) { while (len) {
o_addchr(o, *str); o_addchr(o, *str);
@ -1438,7 +1464,7 @@ static void o_addQchr(o_string *o, int ch)
static void o_addQstr(o_string *o, const char *str, int len) static void o_addQstr(o_string *o, const char *str, int len)
{ {
if (!o->o_escape) { if (!o->o_escape) {
o_addstr(o, str, len); o_addblock(o, str, len);
return; return;
} }
while (len) { while (len) {
@ -1447,7 +1473,7 @@ static void o_addQstr(o_string *o, const char *str, int len)
int ordinary_cnt = strcspn(str, "*?[\\"); int ordinary_cnt = strcspn(str, "*?[\\");
if (ordinary_cnt > len) /* paranoia */ if (ordinary_cnt > len) /* paranoia */
ordinary_cnt = len; ordinary_cnt = len;
o_addstr(o, str, ordinary_cnt); o_addblock(o, str, ordinary_cnt);
if (ordinary_cnt == len) if (ordinary_cnt == len)
return; return;
str += ordinary_cnt; str += ordinary_cnt;
@ -1582,7 +1608,7 @@ static int o_glob(o_string *o, int n)
char **argv = globdata.gl_pathv; char **argv = globdata.gl_pathv;
o->length = pattern - o->data; /* "forget" pattern */ o->length = pattern - o->data; /* "forget" pattern */
while (1) { while (1) {
o_addstrauto(o, *argv); o_addstr_with_NUL(o, *argv);
n = o_save_ptr_helper(o, n); n = o_save_ptr_helper(o, n);
argv++; argv++;
if (!*argv) if (!*argv)
@ -1635,7 +1661,14 @@ static char **o_finalize_list(o_string *o, int n)
static int process_command_subs(o_string *dest, const char *s); static int process_command_subs(o_string *dest, const char *s);
#endif #endif
static char *expand_string_to_string(const char *str); static char *expand_string_to_string(const char *str);
static int parse_stream_dquoted(o_string *dest, struct in_str *input, int dquote_end); #if BB_MMU
#define parse_stream_dquoted(ctx, dest, input, dquote_end) \
parse_stream_dquoted(dest, input, dquote_end)
#endif
static int parse_stream_dquoted(struct parse_context *ctx,
o_string *dest,
struct in_str *input,
int dquote_end);
/* expand_strvec_to_strvec() takes a list of strings, expands /* expand_strvec_to_strvec() takes a list of strings, expands
* all variable references within and returns a pointer to * all variable references within and returns a pointer to
@ -1657,7 +1690,7 @@ static int expand_on_ifs(o_string *output, int n, const char *str)
if (output->o_escape || !output->o_glob) if (output->o_escape || !output->o_glob)
o_addQstr(output, str, word_len); o_addQstr(output, str, word_len);
else /* protect backslashes against globbing up :) */ else /* protect backslashes against globbing up :) */
o_addstr_duplicate_backslash(output, str, word_len); o_addblock_duplicate_backslash(output, str, word_len);
str += word_len; str += word_len;
} }
if (!*str) /* EOL - do not finalize word */ if (!*str) /* EOL - do not finalize word */
@ -1701,7 +1734,7 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask)
#if ENABLE_SH_MATH_SUPPORT #if ENABLE_SH_MATH_SUPPORT
char arith_buf[sizeof(arith_t)*3 + 2]; char arith_buf[sizeof(arith_t)*3 + 2];
#endif #endif
o_addstr(output, arg, p - arg); o_addblock(output, arg, p - arg);
debug_print_list("expand_vars_to_list[1]", output, n); debug_print_list("expand_vars_to_list[1]", output, n);
arg = ++p; arg = ++p;
p = strchr(p, SPECIAL_VAR_SYMBOL); p = strchr(p, SPECIAL_VAR_SYMBOL);
@ -1825,7 +1858,7 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask)
o_string dest = NULL_O_STRING; o_string dest = NULL_O_STRING;
setup_string_in_str(&input, arg); setup_string_in_str(&input, arg);
parse_stream_dquoted(&dest, &input, EOF); parse_stream_dquoted(NULL, &dest, &input, EOF);
//bb_error_msg("'%s' -> '%s'", arg, dest.data); //bb_error_msg("'%s' -> '%s'", arg, dest.data);
exp_str = expand_string_to_string(dest.data); exp_str = expand_string_to_string(dest.data);
//bb_error_msg("'%s' -> '%s'", dest.data, exp_str); //bb_error_msg("'%s' -> '%s'", dest.data, exp_str);
@ -1958,7 +1991,7 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask)
debug_print_list("expand_vars_to_list[a]", output, n); debug_print_list("expand_vars_to_list[a]", output, n);
/* this part is literal, and it was already pre-quoted /* this part is literal, and it was already pre-quoted
* if needed (much earlier), do not use o_addQstr here! */ * if needed (much earlier), do not use o_addQstr here! */
o_addstrauto(output, arg); o_addstr_with_NUL(output, arg);
debug_print_list("expand_vars_to_list[b]", output, n); debug_print_list("expand_vars_to_list[b]", output, n);
} else if (output->length == o_get_last_ptr(output, n) /* expansion is empty */ } else if (output->length == o_get_last_ptr(output, n) /* expansion is empty */
&& !(ored_ch & 0x80) /* and all vars were not quoted. */ && !(ored_ch & 0x80) /* and all vars were not quoted. */
@ -2148,6 +2181,10 @@ static void free_pipe(struct pipe *pi, int indent)
debug_printf_clean("%s end group\n", indenter(indent)); debug_printf_clean("%s end group\n", indenter(indent));
command->group = NULL; command->group = NULL;
} }
#if !BB_MMU
free(command->group_as_string);
command->group_as_string = NULL;
#endif
for (r = command->redirects; r; r = rnext) { for (r = command->redirects; r; r = rnext) {
debug_printf_clean("%s redirect %d%s", indenter(indent), r->fd, redir_table[r->rd_type].descrip); debug_printf_clean("%s redirect %d%s", indenter(indent), r->fd, redir_table[r->rd_type].descrip);
if (r->dup == -1) { if (r->dup == -1) {
@ -2215,9 +2252,7 @@ static void pseudo_exec_argv(nommu_save_t *nommu_save,
char **argv, int assignment_cnt, char **argv, int assignment_cnt,
char **argv_expanded) char **argv_expanded)
{ {
int rcode;
char **new_env; char **new_env;
const struct built_in_command *x;
/* Case when we are here: ... | var=val | ... */ /* Case when we are here: ... | var=val | ... */
if (!argv[assignment_cnt]) if (!argv[assignment_cnt])
@ -2251,12 +2286,17 @@ static void pseudo_exec_argv(nommu_save_t *nommu_save,
* easier to waste a few CPU cycles than it is to figure out * easier to waste a few CPU cycles than it is to figure out
* if this is one of those cases. * if this is one of those cases.
*/ */
for (x = bltins; x != &bltins[ARRAY_SIZE(bltins)]; x++) { {
if (strcmp(argv[0], x->cmd) == 0) { int rcode;
debug_printf_exec("running builtin '%s'\n", argv[0]); const struct built_in_command *x;
rcode = x->function(argv); for (x = bltins; x != &bltins[ARRAY_SIZE(bltins)]; x++) {
fflush(NULL); if (strcmp(argv[0], x->cmd) == 0) {
_exit(rcode); debug_printf_exec("running builtin '%s'\n",
argv[0]);
rcode = x->function(argv);
fflush(NULL);
_exit(rcode);
}
} }
} }
#endif #endif
@ -2320,8 +2360,8 @@ static void pseudo_exec(nommu_save_t *nommu_save,
* since this process is about to exit */ * since this process is about to exit */
_exit(rcode); _exit(rcode);
#else #else
//TODO: re-exec "hush -c command->group_as_a_string" bb_error_msg_and_die("NOMMU TODO: re-exec '%s'",
bb_error_msg_and_die("nested lists are not supported on NOMMU"); command->group_as_string);
#endif #endif
} }
@ -3587,6 +3627,13 @@ static int reserved_word(o_string *word, struct parse_context *ctx)
old = ctx->stack; old = ctx->stack;
old->command->group = ctx->list_head; old->command->group = ctx->list_head;
old->command->grp_type = GRP_NORMAL; old->command->grp_type = GRP_NORMAL;
#if !BB_MMU
o_addstr(&old->as_string, ctx->as_string.data);
o_free_unsafe(&ctx->as_string);
old->command->group_as_string = xstrdup(old->as_string.data);
debug_printf_parse("pop, remembering as:'%s'\n",
old->command->group_as_string);
#endif
*ctx = *old; /* physical copy */ *ctx = *old; /* physical copy */
free(old); free(old);
} }
@ -3739,7 +3786,13 @@ static int redirect_opt_num(o_string *o)
return num; return num;
} }
static struct pipe *parse_stream(struct in_str *input, int end_trigger); #if BB_MMU
#define parse_stream(pstring, input, end_trigger) \
parse_stream(input, end_trigger)
#endif
static struct pipe *parse_stream(char **pstring,
struct in_str *input,
int end_trigger);
static void parse_and_run_string(const char *s); static void parse_and_run_string(const char *s);
#if ENABLE_HUSH_TICK #if ENABLE_HUSH_TICK
@ -3864,15 +3917,33 @@ static int parse_group(o_string *dest, struct parse_context *ctx,
endch = ')'; endch = ')';
command->grp_type = GRP_SUBSHELL; command->grp_type = GRP_SUBSHELL;
} }
pipe_list = parse_stream(input, endch); {
/* empty ()/{} or parse error? */ #if !BB_MMU
if (!pipe_list || pipe_list == ERR_PTR) { char *as_string = NULL;
syntax(NULL); #endif
debug_printf_parse("parse_group return 1: " pipe_list = parse_stream(&as_string, input, endch);
"parse_stream returned %p\n", pipe_list); #if !BB_MMU
return 1; if (as_string)
o_addstr(&ctx->as_string, as_string);
#endif
/* empty ()/{} or parse error? */
if (!pipe_list || pipe_list == ERR_PTR) {
#if !BB_MMU
free(as_string);
#endif
syntax(NULL);
debug_printf_parse("parse_group return 1: "
"parse_stream returned %p\n", pipe_list);
return 1;
}
command->group = pipe_list;
#if !BB_MMU
as_string[strlen(as_string) - 1] = '\0'; /* plink ')' or '}' */
command->group_as_string = as_string;
debug_printf_parse("end of group, remembering as:'%s'\n",
command->group_as_string);
#endif
} }
command->group = pipe_list;
debug_printf_parse("parse_group return 0\n"); debug_printf_parse("parse_group return 0\n");
return 0; return 0;
/* command remains "open", available for possible redirects */ /* command remains "open", available for possible redirects */
@ -4151,14 +4222,24 @@ static int handle_dollar(o_string *dest, struct in_str *input)
return 0; return 0;
} }
static int parse_stream_dquoted(o_string *dest, #if BB_MMU
struct in_str *input, int dquote_end) #define parse_stream_dquoted(ctx, dest, input, dquote_end) \
parse_stream_dquoted(dest, input, dquote_end)
#endif
static int parse_stream_dquoted(struct parse_context *ctx,
o_string *dest,
struct in_str *input,
int dquote_end)
{ {
int ch; int ch;
int next; int next;
again: again:
ch = i_getch(input); ch = i_getch(input);
#if !BB_MMU
if (ctx && ch != EOF)
o_addchr(&ctx->as_string, ch);
#endif
if (ch == dquote_end) { /* may be only '"' or EOF */ if (ch == dquote_end) { /* may be only '"' or EOF */
dest->nonnull = 1; dest->nonnull = 1;
if (dest->o_assignment == NOT_ASSIGNMENT) if (dest->o_assignment == NOT_ASSIGNMENT)
@ -4237,15 +4318,13 @@ static int parse_stream_dquoted(o_string *dest,
* reset parsing machinery and start parsing anew, * reset parsing machinery and start parsing anew,
* or return ERR_PTR. * or return ERR_PTR.
*/ */
static struct pipe *parse_stream(struct in_str *input, int end_trigger) static struct pipe *parse_stream(char **pstring,
struct in_str *input,
int end_trigger)
{ {
struct parse_context ctx; struct parse_context ctx;
o_string dest = NULL_O_STRING; o_string dest = NULL_O_STRING;
int redir_fd;
int next;
int is_in_dquote; int is_in_dquote;
int ch;
redir_type redir_style;
/* Double-quote state is handled in the state variable is_in_dquote. /* Double-quote state is handled in the state variable is_in_dquote.
* A single-quote triggers a bypass of the main loop until its mate is * A single-quote triggers a bypass of the main loop until its mate is
@ -4268,15 +4347,18 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger)
while (1) { while (1) {
const char *is_ifs; const char *is_ifs;
const char *is_special; const char *is_special;
int ch;
int next;
int redir_fd;
redir_type redir_style;
if (is_in_dquote) { if (is_in_dquote) {
if (parse_stream_dquoted(&dest, input, '"')) { if (parse_stream_dquoted(&ctx, &dest, input, '"')) {
goto parse_error; goto parse_error;
} }
/* We reached closing '"' */ /* We reached closing '"' */
is_in_dquote = 0; is_in_dquote = 0;
} }
next = '\0';
ch = i_getch(input); ch = i_getch(input);
debug_printf_parse(": ch=%c (%d) escape=%d\n", debug_printf_parse(": ch=%c (%d) escape=%d\n",
ch, ch, dest.o_escape); ch, ch, dest.o_escape);
@ -4287,8 +4369,9 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger)
} }
o_free(&dest); o_free(&dest);
done_pipe(&ctx, PIPE_SEQ); done_pipe(&ctx, PIPE_SEQ);
/* If we got nothing... */
pi = ctx.list_head; pi = ctx.list_head;
/* If we got nothing... */
// TODO: test script consisting of just "&"
if (pi->num_cmds == 0 if (pi->num_cmds == 0
IF_HAS_KEYWORDS( && pi->res_word == RES_NONE) IF_HAS_KEYWORDS( && pi->res_word == RES_NONE)
) { ) {
@ -4296,12 +4379,18 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger)
pi = NULL; pi = NULL;
} }
debug_printf_parse("parse_stream return %p\n", pi); debug_printf_parse("parse_stream return %p\n", pi);
#if !BB_MMU
debug_printf_parse("as_string '%s'\n", ctx.as_string.data);
if (pstring)
*pstring = ctx.as_string.data;
else
o_free_unsafe(&ctx.as_string);
#endif
return pi; return pi;
} }
if (ch != '\n') { #if !BB_MMU
next = i_peek(input); o_addchr(&ctx.as_string, ch);
} #endif
is_ifs = strchr(G.ifs, ch); is_ifs = strchr(G.ifs, ch);
is_special = strchr("<>;&|(){}#'" /* special outside of "str" */ is_special = strchr("<>;&|(){}#'" /* special outside of "str" */
"\\$\"" USE_HUSH_TICK("`") /* always special */ "\\$\"" USE_HUSH_TICK("`") /* always special */
@ -4356,6 +4445,13 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger)
"end_trigger char found\n", "end_trigger char found\n",
ctx.list_head); ctx.list_head);
o_free(&dest); o_free(&dest);
#if !BB_MMU
debug_printf_parse("as_string '%s'\n", ctx.as_string.data);
if (pstring)
*pstring = ctx.as_string.data;
else
o_free_unsafe(&ctx.as_string);
#endif
return ctx.list_head; return ctx.list_head;
} }
} }
@ -4368,6 +4464,11 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger)
dest.o_assignment = NOT_ASSIGNMENT; dest.o_assignment = NOT_ASSIGNMENT;
} }
next = '\0';
if (ch != '\n') {
next = i_peek(input);
}
switch (ch) { switch (ch) {
case '#': case '#':
if (dest.length == 0) { if (dest.length == 0) {
@ -4601,6 +4702,9 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger)
debug_print_tree(pctx->list_head, 0); debug_print_tree(pctx->list_head, 0);
free_pipe_list(pctx->list_head, 0); free_pipe_list(pctx->list_head, 0);
debug_printf_clean("freed list %p\n", pctx->list_head); debug_printf_clean("freed list %p\n", pctx->list_head);
#if !BB_MMU
o_free_unsafe(&pctx->as_string);
#endif
IF_HAS_KEYWORDS(p2 = pctx->stack;) IF_HAS_KEYWORDS(p2 = pctx->stack;)
if (pctx != &ctx) { if (pctx != &ctx) {
free(pctx); free(pctx);
@ -4612,8 +4716,13 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger)
/* If we are not in top-level parse, we return, /* If we are not in top-level parse, we return,
* our caller will propagate error. * our caller will propagate error.
*/ */
if (end_trigger != ';') if (end_trigger != ';') {
#if !BB_MMU
if (pstring)
*pstring = NULL;
#endif
return ERR_PTR; return ERR_PTR;
}
/* Discard cached input, force prompt */ /* Discard cached input, force prompt */
input->p = NULL; input->p = NULL;
USE_HUSH_INTERACTIVE(input->promptme = 1;) USE_HUSH_INTERACTIVE(input->promptme = 1;)
@ -4621,7 +4730,7 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger)
} }
} }
/* Execiting from string: eval, sh -c '...' /* Executing from string: eval, sh -c '...'
* or from file: /etc/profile, . file, sh <script>, sh (intereactive) * or from file: /etc/profile, . file, sh <script>, sh (intereactive)
* end_trigger controls how often we stop parsing * end_trigger controls how often we stop parsing
* NUL: parse all, execute, return * NUL: parse all, execute, return
@ -4632,7 +4741,7 @@ static void parse_and_run_stream(struct in_str *inp, int end_trigger)
while (1) { while (1) {
struct pipe *pipe_list; struct pipe *pipe_list;
pipe_list = parse_stream(inp, end_trigger); pipe_list = parse_stream(NULL, inp, end_trigger);
if (!pipe_list) /* EOF */ if (!pipe_list) /* EOF */
break; break;
debug_print_tree(pipe_list, 0); debug_print_tree(pipe_list, 0);