diff options
Diffstat (limited to 'lash.c')
| -rw-r--r-- | lash.c | 180 |
1 files changed, 116 insertions, 64 deletions
@@ -39,11 +39,15 @@ //#define BB_FEATURE_SH_BACKTICKS // //If, then, else, etc. support.. This should now behave basically -//like any other Bourne shell... +//like any other Bourne shell -- sortof... #define BB_FEATURE_SH_IF_EXPRESSIONS // -/* This is currently a little broken... */ -//#define HANDLE_CONTINUATION_CHARS +/* This is currently sortof broken, only for the brave... */ +#undef HANDLE_CONTINUATION_CHARS +// +/* This would be great -- if wordexp wouldn't strip all quoting + * out from the target strings... As is, a parser needs */ +#undef BB_FEATURE_SH_WORDEXP // //For debugging/development on the shell only... //#define DEBUG_SHELL @@ -61,10 +65,9 @@ #include <unistd.h> #include <getopt.h> -//#undef __GLIBC__ -//#undef __UCLIBC__ +#undef BB_FEATURE_SH_WORDEXP -#if ( (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1) ) || defined (__UCLIBC__) +#if BB_FEATURE_SH_WORDEXP #include <wordexp.h> #define expand_t wordexp_t #undef BB_FEATURE_SH_BACKTICKS @@ -227,6 +230,10 @@ static int show_x_trace; static char syntax_err[]="syntax error near unexpected token"; #endif +static char *PS1; +static char *PS2; + + #ifdef DEBUG_SHELL static inline void debug_printf(const char *format, ...) { @@ -286,7 +293,7 @@ static int builtin_cd(struct child_prog *child) else newdir = child->argv[1]; if (chdir(newdir)) { - printf("cd: %s: %s\n", newdir, strerror(errno)); + printf("cd: %s: %m\n", newdir); return EXIT_FAILURE; } getcwd(cwd, sizeof(char)*MAX_LINE); @@ -425,13 +432,20 @@ static int builtin_pwd(struct child_prog *dummy) static int builtin_export(struct child_prog *child) { int res; + char *v = child->argv[1]; - if (child->argv[1] == NULL) { + if (v == NULL) { return (builtin_env(child)); } - res = putenv(child->argv[1]); + res = putenv(v); if (res) - fprintf(stderr, "export: %s\n", strerror(errno)); + fprintf(stderr, "export: %m\n"); +#ifndef BB_FEATURE_SIMPLE_PROMPT + if (strncmp(v, "PS1=", 4)==0) + PS1 = getenv("PS1"); + else if (strncmp(v, "PS2=", 4)==0) + PS2 = getenv("PS2"); +#endif return (res); } @@ -461,7 +475,7 @@ static int builtin_read(struct child_prog *child) if((s = strdup(string))) res = putenv(s); if (res) - fprintf(stderr, "read: %s\n", strerror(errno)); + fprintf(stderr, "read: %m\n"); } else fgets(string, sizeof(string), stdin); @@ -759,8 +773,7 @@ static int setup_redirects(struct child_prog *prog, int squirrel[]) if (openfd < 0) { /* this could get lost if stderr has been redirected, but bash and ash both lose it as well (though zsh doesn't!) */ - error_msg("error opening %s: %s", redir->filename, - strerror(errno)); + perror_msg("error opening %s", redir->filename); return 1; } @@ -790,57 +803,40 @@ static void restore_redirects(int squirrel[]) } } -#if defined(BB_FEATURE_SH_SIMPLE_PROMPT) -static char* setup_prompt_string(int state) +static inline void cmdedit_set_initial_prompt(void) { - char prompt_str[BUFSIZ]; - - /* Set up the prompt */ - if (state == 0) { - /* simple prompt */ - sprintf(prompt_str, "%s %s", cwd, ( geteuid() != 0 ) ? "$ ":"# "); - } else { - strcpy(prompt_str,"> "); - } - - return(strdup(prompt_str)); /* Must free this memory */ -} - +#ifdef BB_FEATURE_SIMPLE_PROMPT + PS1 = NULL; + PS2 = "> "; #else + PS1 = getenv("PS1"); + if(PS1==0) { + PS1 = "\\w \\$ "; + } + PS2 = getenv("PS2"); + if(PS2==0) + PS2 = "> "; +#endif +} -static char* setup_prompt_string(int state) +static inline void setup_prompt_string(char **prompt_str) { - char user[9],buf[255],*s; - char prompt[3]; - char prompt_str[BUFSIZ]; - +#ifdef BB_FEATURE_SIMPLE_PROMPT /* Set up the prompt */ - if (state == 0) { - /* get User Name and setup prompt */ - strcpy(prompt,( geteuid() != 0 ) ? "$ ":"# "); - my_getpwuid(user, geteuid()); - - /* get HostName */ - gethostname(buf, 255); - s = strchr(buf, '.'); - if (s) { - *s = 0; - } + if (shell_context == 0) { + if (PS1) + free(PS1); + PS1=xmalloc(strlen(cwd)+4); + sprintf(PS1, "%s %s", cwd, ( geteuid() != 0 ) ? "$ ":"# "); + *prompt_str = PS1; } else { - strcpy(prompt,"> "); + *prompt_str = PS2; } - - if (state == 0) { - snprintf(prompt_str, BUFSIZ-1, "[%s@%s %s]%s", user, buf, - get_last_path_component(cwd), prompt); - } else { - sprintf(prompt_str, "%s", prompt); - } - return(strdup(prompt_str)); /* Must free this memory */ +#else + *prompt_str = (shell_context==0)? PS1 : PS2; +#endif } -#endif - static int get_command(FILE * source, char *command) { char *prompt_str; @@ -857,9 +853,9 @@ static int get_command(FILE * source, char *command) } if (source == stdin) { - prompt_str = setup_prompt_string(shell_context); + setup_prompt_string(&prompt_str); -#ifdef BB_FEATURE_SH_COMMAND_EDITING +#ifdef BB_FEATURE_COMMAND_EDITING /* ** enable command line editing only while a command line ** is actually being read; otherwise, we'll end up bequeathing @@ -868,11 +864,9 @@ static int get_command(FILE * source, char *command) */ cmdedit_read_input(prompt_str, command); cmdedit_terminate(); - free(prompt_str); return 0; #else fputs(prompt_str, stdout); - free(prompt_str); #endif } @@ -910,25 +904,72 @@ static char* itoa(register int i) } #endif +#if defined BB_FEATURE_SH_ENVIRONMENT && ! defined BB_FEATURE_SH_WORDEXP +char * strsep_space( char *string, int * index) +{ + char *token, *begin; + + begin = string; + + /* Short circuit the trivial case */ + if ( !string || ! string[*index]) + return NULL; + + /* Find the end of the token. */ + while( string && string[*index] && !isspace(string[*index]) ) { + (*index)++; + } + + /* Find the end of any whitespace trailing behind + * the token and let that be part of the token */ + while( string && string[*index] && isspace(string[*index]) ) { + (*index)++; + } + + if (! string && *index==0) { + /* Nothing useful was found */ + return NULL; + } + + token = xmalloc(*index); + token[*index] = '\0'; + strncpy(token, string, *index); + + return token; +} +#endif + + static int expand_arguments(char *command) { #ifdef BB_FEATURE_SH_ENVIRONMENT expand_t expand_result; char *src, *dst, *var; + int index = 0; int i=0, length, total_length=0, retval; const char *out_of_space = "out of space during expansion"; #endif /* get rid of the terminating \n */ chomp(command); + + /* Fix up escape sequences to be the Real Thing(tm) */ + while( command && command[index]) { + if (command[index] == '\\') { + char *tmp = command+index+1; + command[index+1] = process_escape_sequence( &tmp ); + memmove(command+index, command+index+1, strlen(command+index)); + } + index++; + } #ifdef BB_FEATURE_SH_ENVIRONMENT -#if ( (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1) ) || defined (__UCLIBC__) +#if BB_FEATURE_SH_WORDEXP /* This first part uses wordexp() which is a wonderful C lib * function which expands nearly everything. */ - retval = wordexp (command, &expand_result, 0); + retval = wordexp (command, &expand_result, WRDE_SHOWERR); if (retval == WRDE_NOSPACE) { /* Mem may have been allocated... */ wordfree (&expand_result); @@ -970,15 +1011,17 @@ static int expand_arguments(char *command) { int flags = GLOB_NOCHECK|GLOB_BRACE|GLOB_TILDE; - char * tmpcmd, *cmd, *cmd_copy; + char *tmpcmd, *cmd, *cmd_copy; /* We need a clean copy, so strsep can mess up the copy while * we write stuff into the original (in a minute) */ cmd = cmd_copy = strdup(command); *command = '\0'; - for (tmpcmd = cmd; (tmpcmd = strsep(&cmd, " \t")) != NULL;) { + for (index = 0, tmpcmd = cmd; + (tmpcmd = strsep_space(cmd, &index)) != NULL; cmd += index, index=0) { if (*tmpcmd == '\0') break; retval = glob(tmpcmd, flags, NULL, &expand_result); + free(tmpcmd); /* Free mem allocated by strsep_space */ if (retval == GLOB_NOSPACE) { /* Mem may have been allocated... */ globfree (&expand_result); @@ -1711,7 +1754,8 @@ static int busy_loop(FILE * input) if (!parse_command(&next_command, &newjob, &inbg) && newjob.num_progs) { int pipefds[2] = {-1,-1}; - debug_printf( "job=%p being fed to run_command by busy_loop()'\n", &newjob); + debug_printf( "job=%p fed to run_command by busy_loop()'\n", + &newjob); run_command(&newjob, inbg, pipefds); } else { @@ -1879,5 +1923,13 @@ int shell_main(int argc_l, char **argv_l) atexit(free_memory); #endif +#ifdef BB_FEATURE_COMMAND_EDITING + cmdedit_set_initial_prompt(); +#else + PS1 = NULL; + PS2 = "> "; +#endif + return (busy_loop(input)); } + |