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-rw-r--r--shell/lash.c126
1 files changed, 54 insertions, 72 deletions
diff --git a/shell/lash.c b/shell/lash.c
index eae949e..fd6bea1 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -54,6 +54,9 @@ enum {
ELSE_EXP_CONTEXT = 0x10
};
+#define LASH_OPT_DONE (1)
+#define LASH_OPT_SAW_QUOTE (2)
+
#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
struct redir_struct {
enum redir_type type; /* type of redirection */
@@ -154,7 +157,7 @@ static int shell_context; /* Type prompt trigger (PS1 or PS2) */
/* Globals that are static to this file */
static const char *cwd;
-static char *local_pending_command = NULL;
+static char *local_pending_command;
static struct jobset job_list = { NULL, NULL };
static int argc;
static char **argv;
@@ -176,7 +179,7 @@ static inline void debug_printf(const char *format, ...)
va_end(args);
}
#else
-static inline void debug_printf(const char *format, ...) { }
+static inline void debug_printf(const char ATTRIBUTE_UNUSED *format, ...) { }
#endif
/*
@@ -304,12 +307,12 @@ static int builtin_fg_bg(struct child_prog *child)
}
/* built-in 'help' handler */
-static int builtin_help(struct child_prog *dummy)
+static int builtin_help(struct child_prog ATTRIBUTE_UNUSED *dummy)
{
struct built_in_command *x;
- printf("\nBuilt-in commands:\n");
- printf("-------------------\n");
+ printf("\nBuilt-in commands:\n"
+ "-------------------\n");
for (x = bltins; x->cmd; x++) {
if (x->descr==NULL)
continue;
@@ -320,7 +323,7 @@ static int builtin_help(struct child_prog *dummy)
continue;
printf("%s\t%s\n", x->cmd, x->descr);
}
- printf("\n\n");
+ putchar('\n');
return EXIT_SUCCESS;
}
@@ -343,7 +346,7 @@ static int builtin_jobs(struct child_prog *child)
/* built-in 'pwd' handler */
-static int builtin_pwd(struct child_prog *dummy)
+static int builtin_pwd(struct child_prog ATTRIBUTE_UNUSED *dummy)
{
cwd = xgetcwd((char *)cwd);
if (!cwd)
@@ -386,7 +389,7 @@ static int builtin_export(struct child_prog *child)
/* built-in 'read VAR' handler */
static int builtin_read(struct child_prog *child)
{
- int res = 0, len, newlen;
+ int res = 0, len;
char *s;
char string[MAX_READ];
@@ -397,16 +400,16 @@ static int builtin_read(struct child_prog *child)
string[len++] = '=';
string[len] = '\0';
fgets(&string[len], sizeof(string) - len, stdin); /* read string */
- newlen = strlen(string);
- if(newlen > len)
- string[--newlen] = '\0'; /* chomp trailing newline */
+ res = strlen(string);
+ if (res > len)
+ string[--res] = '\0'; /* chomp trailing newline */
/*
** string should now contain "VAR=<value>"
** copy it (putenv() won't do that, so we must make sure
** the string resides in a static buffer!)
*/
res = -1;
- if((s = strdup(string)))
+ if ((s = strdup(string)))
res = putenv(s);
if (res)
bb_perror_msg("read");
@@ -423,12 +426,8 @@ static int builtin_source(struct child_prog *child)
FILE *input;
int status;
- if (child->argv[1] == NULL)
- return EXIT_FAILURE;
-
- input = fopen(child->argv[1], "r");
+ input = bb_wfopen(child->argv[1], "r");
if (!input) {
- printf( "Couldn't open file '%s'\n", child->argv[1]);
return EXIT_FAILURE;
}
@@ -635,7 +634,7 @@ static inline void setup_prompt_string(char **prompt_str)
if (shell_context == 0) {
free(PS1);
PS1=xmalloc(strlen(cwd)+4);
- sprintf(PS1, "%s %s", cwd, ( geteuid() != 0 ) ? "$ ":"# ");
+ sprintf(PS1, "%s %c ", cwd, ( geteuid() != 0 ) ? '$': '#');
*prompt_str = PS1;
} else {
*prompt_str = PS2;
@@ -688,20 +687,18 @@ static int get_command(FILE * source, char *command)
static char * strsep_space( char *string, int * ix)
{
- char *token;
-
/* Short circuit the trivial case */
if ( !string || ! string[*ix])
return NULL;
/* Find the end of the token. */
- while( string[*ix] && !isspace(string[*ix]) ) {
+ while (string[*ix] && !isspace(string[*ix]) ) {
(*ix)++;
}
/* Find the end of any whitespace trailing behind
* the token and let that be part of the token */
- while( string[*ix] && isspace(string[*ix]) ) {
+ while (string[*ix] && (isspace)(string[*ix]) ) {
(*ix)++;
}
@@ -710,9 +707,7 @@ static char * strsep_space( char *string, int * ix)
return NULL;
}
- token = xstrndup(string, *ix);
-
- return token;
+ return xstrndup(string, *ix);
}
static int expand_arguments(char *command)
@@ -721,7 +716,7 @@ static int expand_arguments(char *command)
expand_t expand_result;
char *tmpcmd, *cmd, *cmd_copy;
char *src, *dst, *var;
- const char *out_of_space = "out of space during expansion";
+ const char * const out_of_space = "out of space during expansion";
int flags = GLOB_NOCHECK
#ifdef GLOB_BRACE
| GLOB_BRACE
@@ -846,7 +841,7 @@ static int expand_arguments(char *command)
num_skip_chars=1;
} else {
src=dst+1;
- while(isalnum(*src) || *src=='_') src++;
+ while((isalnum)(*src) || *src=='_') src++;
}
if (src == NULL) {
src = dst+dstlen;
@@ -890,10 +885,9 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
char *command;
char *return_command = NULL;
char *src, *buf;
- int argc_l = 0;
- int done = 0;
+ int argc_l;
+ int flag;
int argv_alloced;
- int saw_quote = 0;
char quote = '\0';
struct child_prog *prog;
#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
@@ -902,8 +896,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
#endif
/* skip leading white space */
- while (**command_ptr && isspace(**command_ptr))
- (*command_ptr)++;
+ *command_ptr = skip_whitespace(*command_ptr);
/* this handles empty lines or leading '#' characters */
if (!**command_ptr || (**command_ptr == '#')) {
@@ -937,9 +930,10 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
prog->argv = xmalloc(sizeof(*prog->argv) * argv_alloced);
prog->argv[0] = job->cmdbuf;
+ flag = argc_l = 0;
buf = command;
src = *command_ptr;
- while (*src && !done) {
+ while (*src && !(flag & LASH_OPT_DONE)) {
if (quote == *src) {
quote = '\0';
} else if (quote) {
@@ -960,7 +954,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
*src == ']') *buf++ = '\\';
*buf++ = *src;
} else if (isspace(*src)) {
- if (*prog->argv[argc_l] || saw_quote) {
+ if (*prog->argv[argc_l] || flag & LASH_OPT_SAW_QUOTE) {
buf++, argc_l++;
/* +1 here leaves room for the NULL which ends argv */
if ((argc_l + 1) == argv_alloced) {
@@ -970,21 +964,21 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
argv_alloced);
}
prog->argv[argc_l] = buf;
- saw_quote = 0;
+ flag ^= LASH_OPT_SAW_QUOTE;
}
} else
switch (*src) {
case '"':
case '\'':
quote = *src;
- saw_quote = 1;
+ flag |= LASH_OPT_SAW_QUOTE;
break;
case '#': /* comment */
if (*(src-1)== '$')
*buf++ = *src;
else
- done = 1;
+ flag |= LASH_OPT_DONE;
break;
#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
@@ -1027,8 +1021,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
/* This isn't POSIX sh compliant. Oh well. */
chptr = src;
- while (isspace(*chptr))
- chptr++;
+ chptr = skip_whitespace(chptr);
if (!*chptr) {
bb_error_msg("file name expected after %c", *(src-1));
@@ -1047,13 +1040,10 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
case '|': /* pipe */
/* finish this command */
- if (*prog->argv[argc_l] || saw_quote)
+ if (*prog->argv[argc_l] || flag & LASH_OPT_SAW_QUOTE)
argc_l++;
if (!argc_l) {
- bb_error_msg("empty command in pipe");
- free_job(job);
- job->num_progs=0;
- return 1;
+ goto empty_command_in_pipe;
}
prog->argv[argc_l] = NULL;
@@ -1073,10 +1063,10 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
prog->argv[0] = ++buf;
src++;
- while (*src && isspace(*src))
- src++;
+ src = skip_whitespace(src);
if (!*src) {
+empty_command_in_pipe:
bb_error_msg("empty command in pipe");
free_job(job);
job->num_progs=0;
@@ -1090,9 +1080,10 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
#ifdef CONFIG_LASH_JOB_CONTROL
case '&': /* background */
*inbg = 1;
+ /* fallthrough */
#endif
case ';': /* multiple commands */
- done = 1;
+ flag |= LASH_OPT_DONE;
return_command = *command_ptr + (src - *command_ptr) + 1;
break;
@@ -1113,7 +1104,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
src++;
}
- if (*prog->argv[argc_l] || saw_quote) {
+ if (*prog->argv[argc_l] || flag & LASH_OPT_SAW_QUOTE) {
argc_l++;
}
if (!argc_l) {
@@ -1295,7 +1286,7 @@ static int run_command(struct job *newjob, int inbg, int outpipe[2])
signal(SIGTTOU, SIG_DFL);
signal(SIGCHLD, SIG_DFL);
- // Close all open filehandles.
+ /* Close all open filehandles. */
while(close_me_list) close((long)llist_pop(&close_me_list));
if (outpipe[1]!=-1) {
@@ -1512,14 +1503,13 @@ static inline void setup_job_control(void)
int lash_main(int argc_l, char **argv_l)
{
- int opt, interactive=FALSE;
+ unsigned long opt;
FILE *input = stdin;
argc = argc_l;
argv = argv_l;
/* These variables need re-initializing when recursing */
last_jobid = 0;
- local_pending_command = NULL;
close_me_list = NULL;
job_list.head = NULL;
job_list.fg = NULL;
@@ -1532,27 +1522,18 @@ int lash_main(int argc_l, char **argv_l)
llist_add_to(&close_me_list, (void *)(long)fileno(prof_input));
/* Now run the file */
busy_loop(prof_input);
- fclose(prof_input);
+ bb_fclose_nonstdin(prof_input);
llist_pop(&close_me_list);
}
}
- while ((opt = getopt(argc_l, argv_l, "cxi")) > 0) {
- switch (opt) {
- case 'c':
- input = NULL;
- if (local_pending_command != 0)
- bb_error_msg_and_die("multiple -c arguments");
- local_pending_command = xstrdup(argv[optind]);
- optind++;
- argv = argv+optind;
- break;
- case 'i':
- interactive++;
- break;
- default:
- bb_show_usage();
- }
+ opt = bb_getopt_ulflags(argc_l, argv_l, "+ic:", &local_pending_command);
+#define LASH_OPT_i (1<<0)
+#define LASH_OPT_c (1<<2)
+ if (opt & LASH_OPT_c) {
+ input = NULL;
+ optind++;
+ argv += optind;
}
/* A shell is interactive if the `-i' flag was given, or if all of
* the following conditions are met:
@@ -1564,14 +1545,15 @@ int lash_main(int argc_l, char **argv_l)
if (argv[optind]==NULL && input==stdin &&
isatty(STDIN_FILENO) && isatty(STDOUT_FILENO))
{
- interactive++;
+ opt |= LASH_OPT_i;
}
setup_job_control();
- if (interactive) {
+ if (opt & LASH_OPT_i) {
/* Looks like they want an interactive shell */
if (!ENABLE_FEATURE_SH_EXTRA_QUIET) {
- printf( "\n\n%s Built-in shell (lash)\n", BB_BANNER);
- printf( "Enter 'help' for a list of built-in commands.\n\n");
+ printf("\n\n%s Built-in shell (lash)\n"
+ "Enter 'help' for a list of built-in commands.\n\n",
+ BB_BANNER);
}
} else if (!local_pending_command && argv[optind]) {
//printf( "optind=%d argv[optind]='%s'\n", optind, argv[optind]);
generated by cgit v1.1 at 2024-11-08 04:19:55 +0000