summaryrefslogtreecommitdiff
path: root/shell/hush.c
diff options
context:
space:
mode:
Diffstat (limited to 'shell/hush.c')
-rw-r--r--shell/hush.c194
1 files changed, 105 insertions, 89 deletions
diff --git a/shell/hush.c b/shell/hush.c
index 6d05c06..7bc3b9a 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -583,7 +583,8 @@ static int builtin_fg_bg(struct child_prog *child)
for (i = 0; i < pi->num_progs; i++)
pi->progs[i].is_stopped = 0;
- if ( (i=kill(- pi->pgrp, SIGCONT)) < 0) {
+ i = kill(- pi->pgrp, SIGCONT);
+ if (i < 0) {
if (i == ESRCH) {
remove_bg_job(pi);
} else {
@@ -831,7 +832,7 @@ static int b_adduint(o_string *o, unsigned i)
int r;
char *p = simple_itoa(i);
/* no escape checking necessary */
- do r = b_addchr(o, *p++); while (r==0 && *p);
+ do r = b_addchr(o, *p++); while (r == 0 && *p);
return r;
}
@@ -972,8 +973,8 @@ static void setup_string_in_str(struct in_str *i, const char *s)
{
i->peek = static_peek;
i->get = static_get;
- i->__promptme=1;
- i->promptmode=1;
+ i->__promptme = 1;
+ i->promptmode = 1;
i->p = s;
}
@@ -1114,7 +1115,7 @@ static void pseudo_exec(struct child_prog *child)
#if ENABLE_FEATURE_SH_STANDALONE_SHELL
{
int argc_l;
- char** argv_l=child->argv;
+ char** argv_l = child->argv;
char *name = child->argv[0];
/* Count argc for use in a second... */
@@ -1430,7 +1431,7 @@ static int run_pipe_real(struct pipe *pi)
dup2(nextout, 1);
close(nextout);
}
- if (pipefds[0]!=-1) {
+ if (pipefds[0] != -1) {
close(pipefds[0]); /* opposite end of our output pipe */
}
@@ -1438,7 +1439,7 @@ static int run_pipe_real(struct pipe *pi)
* and the pipe fd is available for dup'ing. */
setup_redirects(child,NULL);
- if (interactive && pi->followup!=PIPE_BG) {
+ if (interactive && pi->followup != PIPE_BG) {
/* If we (the child) win the race, put ourselves in the process
* group whose leader is the first process in this pipe. */
if (pi->pgrp < 0) {
@@ -1789,9 +1790,9 @@ static const char *get_local_var(const char *s)
}
/* This is used to set local shell variables
- flg_export==0 if only local (not exporting) variable
- flg_export==1 if "new" exporting environ
- flg_export>1 if current startup environ (not call putenv()) */
+ flg_export == 0 if only local (not exporting) variable
+ flg_export == 1 if "new" exporting environ
+ flg_export > 1 if current startup environ (not call putenv()) */
static int set_local_var(const char *s, int flg_export)
{
char *name, *value;
@@ -1817,7 +1818,7 @@ static int set_local_var(const char *s, int flg_export)
if (cur) {
if (strcmp(cur->value, value) == 0) {
- if (flg_export>0 && cur->flg_export == 0)
+ if (flg_export > 0 && cur->flg_export == 0)
cur->flg_export = flg_export;
else
result++;
@@ -1826,7 +1827,7 @@ static int set_local_var(const char *s, int flg_export)
bb_error_msg("%s: readonly variable", name);
result = -1;
} else {
- if (flg_export > 0 || cur->flg_export>1)
+ if (flg_export > 0 || cur->flg_export > 1)
cur->flg_export = 1;
free((char*)cur->value);
@@ -2024,14 +2025,14 @@ static int reserved_word(o_string *dest, struct p_context *ctx)
}
*new = *ctx; /* physical copy */
initialize_context(ctx);
- ctx->stack=new;
- } else if ( ctx->w == RES_NONE || ! (ctx->old_flag & (1<<r->code))) {
+ ctx->stack = new;
+ } else if (ctx->w == RES_NONE || !(ctx->old_flag & (1 << r->code))) {
syntax();
ctx->w = RES_SNTX;
b_reset(dest);
return 1;
}
- ctx->w=r->code;
+ ctx->w = r->code;
ctx->old_flag = r->flag;
if (ctx->old_flag & FLAG_END) {
struct p_context *old;
@@ -2054,7 +2055,7 @@ static int reserved_word(o_string *dest, struct p_context *ctx)
* Syntax or xglob errors return 1. */
static int done_word(o_string *dest, struct p_context *ctx)
{
- struct child_prog *child=ctx->child;
+ struct child_prog *child = ctx->child;
glob_t *glob_target;
int gr, flags = 0;
@@ -2072,7 +2073,8 @@ static int done_word(o_string *dest, struct p_context *ctx)
}
if (!child->argv && (ctx->type & FLAG_PARSE_SEMICOLON)) {
debug_printf("checking %s for reserved-ness\n",dest->data);
- if (reserved_word(dest,ctx)) return ctx->w==RES_SNTX;
+ if (reserved_word(dest,ctx))
+ return (ctx->w == RES_SNTX);
}
glob_target = &child->glob_result;
if (child->argv) flags |= GLOB_APPEND;
@@ -2082,7 +2084,7 @@ static int done_word(o_string *dest, struct p_context *ctx)
b_reset(dest);
if (ctx->pending_redirect) {
- ctx->pending_redirect=NULL;
+ ctx->pending_redirect = NULL;
if (glob_target->gl_pathc != 1) {
bb_error_msg("ambiguous redirect");
return 1;
@@ -2106,8 +2108,8 @@ static int done_command(struct p_context *ctx)
* Only real trickiness here is that the uncommitted
* child structure, to which ctx->child points, is not
* counted in pi->num_progs. */
- struct pipe *pi=ctx->pipe;
- struct child_prog *prog=ctx->child;
+ struct pipe *pi = ctx->pipe;
+ struct child_prog *prog = ctx->child;
if (prog && prog->group == NULL
&& prog->argv == NULL
@@ -2144,7 +2146,7 @@ static int done_pipe(struct p_context *ctx, pipe_style type)
debug_printf("done_pipe, type %d\n", type);
ctx->pipe->followup = type;
ctx->pipe->r_mode = ctx->w;
- new_p=new_pipe();
+ new_p = new_pipe();
ctx->pipe->next = new_p;
ctx->pipe = new_p;
ctx->child = NULL;
@@ -2158,19 +2160,19 @@ static int done_pipe(struct p_context *ctx, pipe_style type)
*/
static int redirect_dup_num(struct in_str *input)
{
- int ch, d=0, ok=0;
+ int ch, d = 0, ok = 0;
ch = b_peek(input);
if (ch != '&') return -1;
b_getch(input); /* get the & */
- ch=b_peek(input);
+ ch = b_peek(input);
if (ch == '-') {
b_getch(input);
return -3; /* "-" represents "close me" */
}
while (isdigit(ch)) {
d = d*10+(ch-'0');
- ok=1;
+ ok = 1;
b_getch(input);
ch = b_peek(input);
}
@@ -2195,14 +2197,15 @@ static int redirect_opt_num(o_string *o)
{
int num;
- if (o->length==0) return -1;
- for (num=0; num<o->length; num++) {
- if (!isdigit(*(o->data+num))) {
+ if (o->length == 0)
+ return -1;
+ for (num = 0; num < o->length; num++) {
+ if (!isdigit(*(o->data + num))) {
return -1;
}
}
/* reuse num (and save an int) */
- num=atoi(o->data);
+ num = atoi(o->data);
b_reset(o);
return num;
}
@@ -2211,15 +2214,15 @@ static FILE *generate_stream_from_list(struct pipe *head)
{
FILE *pf;
int pid, channel[2];
- if (pipe(channel)<0) bb_perror_msg_and_die("pipe");
+ if (pipe(channel) < 0) bb_perror_msg_and_die("pipe");
#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
- pid=fork();
+ pid = fork();
#else
- pid=vfork();
+ pid = vfork();
#endif
- if (pid<0) {
+ if (pid < 0) {
bb_perror_msg_and_die("fork");
- } else if (pid==0) {
+ } else if (pid == 0) {
close(channel[0]);
if (channel[1] != 1) {
dup2(channel[1],1);
@@ -2239,7 +2242,7 @@ static FILE *generate_stream_from_list(struct pipe *head)
static int process_command_subs(o_string *dest, struct p_context *ctx, struct in_str *input, int subst_end)
{
int retcode;
- o_string result=NULL_O_STRING;
+ o_string result = NULL_O_STRING;
struct p_context inner;
FILE *p;
struct in_str pipe_str;
@@ -2252,8 +2255,8 @@ static int process_command_subs(o_string *dest, struct p_context *ctx, struct in
done_pipe(&inner, PIPE_SEQ);
b_free(&result);
- p=generate_stream_from_list(inner.list_head);
- if (p==NULL) return 1;
+ p = generate_stream_from_list(inner.list_head);
+ if (p == NULL) return 1;
mark_open(fileno(p));
setup_file_in_str(&pipe_str, p);
@@ -2262,7 +2265,8 @@ static int process_command_subs(o_string *dest, struct p_context *ctx, struct in
/* XXX In case of a syntax error, should we try to kill the child?
* That would be tough to do right, so just read until EOF. */
if (retcode == 1) {
- while (b_getch(&pipe_str)!=EOF) { /* discard */ };
+ while (b_getch(&pipe_str) != EOF)
+ /* discard */;
}
debug_printf("done reading from pipe, pclose()ing\n");
@@ -2272,7 +2276,7 @@ static int process_command_subs(o_string *dest, struct p_context *ctx, struct in
* at the same time. That would be a lot of work, and contrary
* to the KISS philosophy of this program. */
mark_closed(fileno(p));
- retcode=pclose(p);
+ retcode = pclose(p);
free_pipe_list(inner.list_head,0);
debug_printf("pclosed, retcode=%d\n",retcode);
/* XXX this process fails to trim a single trailing newline */
@@ -2282,7 +2286,7 @@ static int process_command_subs(o_string *dest, struct p_context *ctx, struct in
static int parse_group(o_string *dest, struct p_context *ctx,
struct in_str *input, int ch)
{
- int rcode, endch=0;
+ int rcode, endch = 0;
struct p_context sub;
struct child_prog *child = ctx->child;
if (child->argv) {
@@ -2291,11 +2295,17 @@ static int parse_group(o_string *dest, struct p_context *ctx,
}
initialize_context(&sub);
switch (ch) {
- case '(': endch=')'; child->subshell=1; break;
- case '{': endch='}'; break;
- default: syntax(); /* really logic error */
- }
- rcode=parse_stream(dest,&sub,input,endch);
+ case '(':
+ endch = ')';
+ child->subshell = 1;
+ break;
+ case '{':
+ endch = '}';
+ break;
+ default:
+ syntax(); /* really logic error */
+ }
+ rcode = parse_stream(dest,&sub,input,endch);
done_word(dest,&sub); /* finish off the final word in the subcontext */
done_pipe(&sub, PIPE_SEQ); /* and the final command there, too */
child->group = sub.list_head;
@@ -2319,21 +2329,21 @@ static const char *lookup_param(const char *src)
/* return code: 0 for OK, 1 for syntax error */
static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input)
{
- int i, advance=0;
+ int i, advance = 0;
char sep[] = " ";
int ch = input->peek(input); /* first character after the $ */
debug_printf("handle_dollar: ch=%c\n",ch);
if (isalpha(ch)) {
b_addchr(dest, SPECIAL_VAR_SYMBOL);
ctx->child->sp++;
- while (ch=b_peek(input),isalnum(ch) || ch=='_') {
+ while (ch = b_peek(input),isalnum(ch) || ch == '_') {
b_getch(input);
b_addchr(dest,ch);
}
b_addchr(dest, SPECIAL_VAR_SYMBOL);
} else if (isdigit(ch)) {
i = ch-'0'; /* XXX is $0 special? */
- if (i<global_argc) {
+ if (i < global_argc) {
parse_string(dest, ctx, global_argv[i]); /* recursion */
}
advance = 1;
@@ -2359,7 +2369,10 @@ static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *i
ctx->child->sp++;
b_getch(input);
/* XXX maybe someone will try to escape the '}' */
- while (ch=b_getch(input),ch!=EOF && ch!='}') {
+ while (1) {
+ ch = b_getch(input);
+ if (ch == EOF || ch == '}')
+ break;
b_addchr(dest,ch);
}
if (ch != '}') {
@@ -2373,10 +2386,11 @@ static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *i
process_command_subs(dest, ctx, input, ')');
break;
case '*':
- sep[0]=ifs[0];
- for (i=1; i<global_argc; i++) {
+ sep[0] = ifs[0];
+ for (i = 1; i < global_argc; i++) {
parse_string(dest, ctx, global_argv[i]);
- if (i+1 < global_argc) parse_string(dest, ctx, sep);
+ if (i+1 < global_argc)
+ parse_string(dest, ctx, sep);
}
break;
case '@':
@@ -2419,28 +2433,31 @@ int parse_stream(o_string *dest, struct p_context *ctx,
* found. When recursing, quote state is passed in via dest->quote. */
debug_printf("parse_stream, end_trigger=%d\n",end_trigger);
- while ((ch=b_getch(input))!=EOF) {
+ while ((ch = b_getch(input)) != EOF) {
m = map[ch];
next = (ch == '\n') ? 0 : b_peek(input);
debug_printf("parse_stream: ch=%c (%d) m=%d quote=%d\n",
- ch,ch,m,dest->quote);
- if (m==0 || ((m==1 || m==2) && dest->quote)) {
+ ch, ch, m, dest->quote);
+ if (m == 0 || ((m == 1 || m == 2) && dest->quote)) {
b_addqchr(dest, ch, dest->quote);
- } else {
- if (m==2) { /* unquoted IFS */
- if (done_word(dest, ctx)) {
- return 1;
- }
- /* If we aren't performing a substitution, treat a newline as a
- * command separator. */
- if (end_trigger != '\0' && ch=='\n')
- done_pipe(ctx,PIPE_SEQ);
- }
- if (ch == end_trigger && !dest->quote && ctx->w==RES_NONE) {
- debug_printf("leaving parse_stream (triggered)\n");
- return 0;
+ continue;
+ }
+ if (m == 2) { /* unquoted IFS */
+ if (done_word(dest, ctx)) {
+ return 1;
}
- if (m!=2) switch (ch) {
+ /* If we aren't performing a substitution, treat a newline as a
+ * command separator. */
+ if (end_trigger != '\0' && ch == '\n')
+ done_pipe(ctx,PIPE_SEQ);
+ }
+ if (ch == end_trigger && !dest->quote && ctx->w == RES_NONE) {
+ debug_printf("leaving parse_stream (triggered)\n");
+ return 0;
+ }
+ if (m == 2)
+ continue;
+ switch (ch) {
case '#':
if (dest->length == 0 && !dest->quote) {
while (1) {
@@ -2462,7 +2479,7 @@ int parse_stream(o_string *dest, struct p_context *ctx,
b_addqchr(dest, b_getch(input), dest->quote);
break;
case '$':
- if (handle_dollar(dest, ctx, input)!=0) return 1;
+ if (handle_dollar(dest, ctx, input) != 0) return 1;
break;
case '\'':
dest->nonnull = 1;
@@ -2487,9 +2504,9 @@ int parse_stream(o_string *dest, struct p_context *ctx,
case '>':
redir_fd = redirect_opt_num(dest);
done_word(dest, ctx);
- redir_style=REDIRECT_OVERWRITE;
+ redir_style = REDIRECT_OVERWRITE;
if (next == '>') {
- redir_style=REDIRECT_APPEND;
+ redir_style = REDIRECT_APPEND;
b_getch(input);
} else if (next == '(') {
syntax(); /* until we support >(list) Process Substitution */
@@ -2500,12 +2517,12 @@ int parse_stream(o_string *dest, struct p_context *ctx,
case '<':
redir_fd = redirect_opt_num(dest);
done_word(dest, ctx);
- redir_style=REDIRECT_INPUT;
+ redir_style = REDIRECT_INPUT;
if (next == '<') {
- redir_style=REDIRECT_HEREIS;
+ redir_style = REDIRECT_HEREIS;
b_getch(input);
} else if (next == '>') {
- redir_style=REDIRECT_IO;
+ redir_style = REDIRECT_IO;
b_getch(input);
} else if (next == '(') {
syntax(); /* until we support <(list) Process Substitution */
@@ -2519,7 +2536,7 @@ int parse_stream(o_string *dest, struct p_context *ctx,
break;
case '&':
done_word(dest, ctx);
- if (next=='&') {
+ if (next == '&') {
b_getch(input);
done_pipe(ctx,PIPE_AND);
} else {
@@ -2528,7 +2545,7 @@ int parse_stream(o_string *dest, struct p_context *ctx,
break;
case '|':
done_word(dest, ctx);
- if (next=='|') {
+ if (next == '|') {
b_getch(input);
done_pipe(ctx,PIPE_OR);
} else {
@@ -2540,17 +2557,16 @@ int parse_stream(o_string *dest, struct p_context *ctx,
break;
case '(':
case '{':
- if (parse_group(dest, ctx, input, ch)!=0) return 1;
+ if (parse_group(dest, ctx, input, ch) != 0)
+ return 1;
break;
case ')':
case '}':
syntax(); /* Proper use of this character caught by end_trigger */
return 1;
- break;
default:
syntax(); /* this is really an internal logic error */
return 1;
- }
}
}
/* complain if quote? No, maybe we just finished a command substitution
@@ -2595,14 +2611,14 @@ int parse_stream_outer(struct in_str *inp, int flag)
{
struct p_context ctx;
- o_string temp=NULL_O_STRING;
+ o_string temp = NULL_O_STRING;
int rcode;
do {
ctx.type = flag;
initialize_context(&ctx);
update_ifs_map();
if (!(flag & FLAG_PARSE_SEMICOLON) || (flag & FLAG_REPARSING)) mapset(";$&|", 0);
- inp->promptmode=1;
+ inp->promptmode = 1;
rcode = parse_stream(&temp, &ctx, inp, '\n');
if (rcode != 1 && ctx.old_flag != 0) {
syntax();
@@ -2710,8 +2726,7 @@ int hush_main(int argc, char **argv)
set_local_var(*e, 2); /* without call putenv() */
}
- last_return_code=EXIT_SUCCESS;
-
+ last_return_code = EXIT_SUCCESS;
if (argv[0] && argv[0][0] == '-') {
debug_printf("\nsourcing /etc/profile\n");
@@ -2722,7 +2737,7 @@ int hush_main(int argc, char **argv)
fclose(input);
}
}
- input=stdin;
+ input = stdin;
while ((opt = getopt(argc, argv, "c:xif")) > 0) {
switch (opt) {
@@ -2757,8 +2772,9 @@ int hush_main(int argc, char **argv)
* standard input is a terminal
* standard output is a terminal
* Refer to Posix.2, the description of the `sh' utility. */
- if (argv[optind]==NULL && input==stdin &&
- isatty(STDIN_FILENO) && isatty(STDOUT_FILENO)) {
+ if (argv[optind] == NULL && input == stdin
+ && isatty(STDIN_FILENO) && isatty(STDOUT_FILENO)
+ ) {
interactive++;
}
@@ -2773,8 +2789,8 @@ int hush_main(int argc, char **argv)
setup_job_control();
}
- if (argv[optind]==NULL) {
- opt=parse_file_outer(stdin);
+ if (argv[optind] == NULL) {
+ opt = parse_file_outer(stdin);
goto final_return;
}
@@ -2885,7 +2901,7 @@ static char **make_list_in(char **inp, char *name)
}
/* Make new string for parser */
-static char * make_string(char ** inp)
+static char* make_string(char ** inp)
{
char *p;
char *str = NULL;
generated by cgit v1.1 at 2024-12-25 06:25:05 +0000