Re-enable globbing (I'd accidentaly removed it) and finish off the last
of the job control polishing. Works fine now. -Erik
This commit is contained in:
Eric Andersen
parent
5c66d06104
commit
4b6b5e4314
234
lash.c
234
lash.c
@ -135,6 +135,7 @@ static void mark_open(int fd);
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static void mark_closed(int fd);
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static void close_all(void);
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static void checkjobs(struct jobset *job_list);
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static void remove_job(struct jobset *j_list, struct job *job);
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static int get_command(FILE * source, char *command);
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static int parse_command(char **command_ptr, struct job *job, int *inbg);
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static int run_command(struct job *newjob, int inbg, int outpipe[2]);
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@ -181,6 +182,8 @@ static struct jobset job_list = { NULL, NULL };
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static int argc;
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static char **argv;
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static struct close_me *close_me_head;
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static int last_return_code;
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static int last_bg_pid;
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static unsigned int last_jobid;
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static int shell_terminal;
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static pid_t shell_pgrp;
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@ -313,8 +316,12 @@ static int builtin_fg_bg(struct child_prog *child)
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job->stopped_progs = 0;
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if (kill(- job->pgrp, SIGCONT) < 0)
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if ( (i=kill(- job->pgrp, SIGCONT)) < 0) {
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if (i == ESRCH) {
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remove_job(&job_list, job);
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}
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perror_msg("kill (SIGCONT)");
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}
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return EXIT_SUCCESS;
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}
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@ -536,6 +543,11 @@ static void remove_job(struct jobset *j_list, struct job *job)
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prevjob->next = job->next;
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}
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if (j_list->head)
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last_jobid = j_list->head->jobid;
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else
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last_jobid = 0;
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free(job);
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}
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@ -576,10 +588,15 @@ static void checkjobs(struct jobset *j_list)
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job->stopped_progs++;
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job->progs[prognum].is_stopped = 1;
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#if 0
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/* Printing this stuff is a pain, since it tends to
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* overwrite the prompt an inconveinient moments. So
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* don't do that. */
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if (job->stopped_progs == job->num_progs) {
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printf(JOB_STATUS_FORMAT, job->jobid, "Stopped",
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job->text);
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}
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#endif
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}
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}
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@ -714,14 +731,78 @@ static int get_command(FILE * source, char *command)
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return 0;
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}
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static char* itoa(register int i)
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{
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static char a[7]; /* Max 7 ints */
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register char *b = a + sizeof(a) - 1;
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int sign = (i < 0);
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if (sign)
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i = -i;
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*b = 0;
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do
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{
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*--b = '0' + (i % 10);
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i /= 10;
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}
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while (i);
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if (sign)
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*--b = '-';
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return b;
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}
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char * strsep_space( char *string, int * ix)
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{
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char *token, *begin;
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begin = string;
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/* Short circuit the trivial case */
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if ( !string || ! string[*ix])
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return NULL;
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/* Find the end of the token. */
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while( string && string[*ix] && !isspace(string[*ix]) ) {
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(*ix)++;
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}
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/* Find the end of any whitespace trailing behind
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* the token and let that be part of the token */
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while( string && string[*ix] && isspace(string[*ix]) ) {
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(*ix)++;
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}
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if (! string && *ix==0) {
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/* Nothing useful was found */
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return NULL;
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}
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token = xmalloc(*ix+1);
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token[*ix] = '\0';
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strncpy(token, string, *ix);
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return token;
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}
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static int expand_arguments(char *command)
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{
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int ix = 0;
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int total_length=0, length, i, retval, ix = 0;
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expand_t expand_result;
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char *tmpcmd, *cmd, *cmd_copy;
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char *src, *dst, *var;
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const char *out_of_space = "out of space during expansion";
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int flags = GLOB_NOCHECK
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#ifdef GLOB_BRACE
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| GLOB_BRACE
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#endif
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#ifdef GLOB_TILDE
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| GLOB_TILDE
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#endif
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;
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/* get rid of the terminating \n */
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chomp(command);
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/* Fix up escape sequences to be the Real Thing(tm) */
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while( command && command[ix]) {
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if (command[ix] == '\\') {
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@ -731,6 +812,139 @@ static int expand_arguments(char *command)
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}
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ix++;
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}
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/* Use glob and then fixup environment variables and such */
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/* It turns out that glob is very stupid. We have to feed it one word at a
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* time since it can't cope with a full string. Here we convert command
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* (char*) into cmd (char**, one word per string) */
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/* We need a clean copy, so strsep can mess up the copy while
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* we write stuff into the original (in a minute) */
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cmd = cmd_copy = strdup(command);
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*command = '\0';
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for (ix = 0, tmpcmd = cmd;
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(tmpcmd = strsep_space(cmd, &ix)) != NULL; cmd += ix, ix=0) {
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if (*tmpcmd == '\0')
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break;
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/* we need to trim() the result for glob! */
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trim(tmpcmd);
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retval = glob(tmpcmd, flags, NULL, &expand_result);
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free(tmpcmd); /* Free mem allocated by strsep_space */
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if (retval == GLOB_NOSPACE) {
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/* Mem may have been allocated... */
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globfree (&expand_result);
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error_msg(out_of_space);
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return FALSE;
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} else if (retval != 0) {
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/* Some other error. GLOB_NOMATCH shouldn't
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* happen because of the GLOB_NOCHECK flag in
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* the glob call. */
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error_msg("syntax error");
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return FALSE;
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} else {
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/* Convert from char** (one word per string) to a simple char*,
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* but don't overflow command which is BUFSIZ in length */
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for (i=0; i < expand_result.gl_pathc; i++) {
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length=strlen(expand_result.gl_pathv[i]);
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if (total_length+length+1 >= BUFSIZ) {
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error_msg(out_of_space);
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return FALSE;
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}
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strcat(command+total_length, " ");
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total_length+=1;
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strcat(command+total_length, expand_result.gl_pathv[i]);
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total_length+=length;
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}
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globfree (&expand_result);
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}
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}
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free(cmd_copy);
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trim(command);
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/* Now do the shell variable substitutions which
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* wordexp can't do for us, namely $? and $! */
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src = command;
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while((dst = strchr(src,'$')) != NULL){
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var = NULL;
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switch(*(dst+1)) {
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case '?':
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var = itoa(last_return_code);
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break;
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case '!':
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if (last_bg_pid==-1)
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*(var)='\0';
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else
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var = itoa(last_bg_pid);
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break;
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/* Everything else like $$, $#, $[0-9], etc. should all be
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* expanded by wordexp(), so we can in theory skip that stuff
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* here, but just to be on the safe side (i.e., since uClibc
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* wordexp doesn't do this stuff yet), lets leave it in for
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* now. */
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case '$':
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var = itoa(getpid());
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break;
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case '#':
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var = itoa(argc-1);
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break;
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case '0':case '1':case '2':case '3':case '4':
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case '5':case '6':case '7':case '8':case '9':
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{
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int ixx=*(dst + 1)-48;
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if (ixx >= argc) {
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var='\0';
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} else {
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var = argv[ixx];
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}
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}
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break;
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}
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if (var) {
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/* a single character construction was found, and
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* already handled in the case statement */
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src=dst+2;
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} else {
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/* Looks like an environment variable */
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char delim_hold;
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int num_skip_chars=0;
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int dstlen = strlen(dst);
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/* Is this a ${foo} type variable? */
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if (dstlen >=2 && *(dst+1) == '{') {
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src=strchr(dst+1, '}');
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num_skip_chars=1;
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} else {
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src=dst+1;
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while(isalnum(*src) || *src=='_') src++;
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}
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if (src == NULL) {
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src = dst+dstlen;
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}
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delim_hold=*src;
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*src='\0'; /* temporary */
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var = getenv(dst + 1 + num_skip_chars);
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*src=delim_hold;
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src += num_skip_chars;
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}
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if (var == NULL) {
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/* Seems we got an un-expandable variable. So delete it. */
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var = "";
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}
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{
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int subst_len = strlen(var);
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int trail_len = strlen(src);
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if (dst+subst_len+trail_len >= command+BUFSIZ) {
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error_msg(out_of_space);
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return FALSE;
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}
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/* Move stuff to the end of the string to accommodate
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* filling the created gap with the new stuff */
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memmove(dst+subst_len, src, trail_len+1);
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/* Now copy in the new stuff */
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memcpy(dst, var, subst_len);
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src = dst+subst_len;
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}
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}
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return TRUE;
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}
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@ -1078,6 +1292,7 @@ static void insert_job(struct job *newjob, int inbg)
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printf("[%d] %d\n", thejob->jobid,
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newjob->progs[newjob->num_progs - 1].pid);
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last_jobid = newjob->jobid;
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last_bg_pid=newjob->progs[newjob->num_progs - 1].pid;
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} else {
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newjob->job_list->fg = thejob;
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@ -1250,6 +1465,8 @@ static int busy_loop(FILE * input)
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job_list.fg->running_progs--;
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job_list.fg->progs[i].pid = 0;
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last_return_code=WEXITSTATUS(status);
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if (!job_list.fg->running_progs) {
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/* child exited */
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remove_job(&job_list, job_list.fg);
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@ -1322,10 +1539,9 @@ static void setup_job_control()
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signal(SIGCHLD, SIG_IGN);
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/* Put ourselves in our own process group. */
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setsid();
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shell_pgrp = getpid ();
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if (setpgid (shell_pgrp, shell_pgrp) < 0) {
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perror_msg_and_die("Couldn't put the shell in its own process group");
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}
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setpgid (shell_pgrp, shell_pgrp);
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/* Grab control of the terminal. */
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tcsetpgrp(shell_terminal, shell_pgrp);
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@ -1345,13 +1561,12 @@ int shell_main(int argc_l, char **argv_l)
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close_me_head = NULL;
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job_list.head = NULL;
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job_list.fg = NULL;
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last_return_code=1;
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if (argv[0] && argv[0][0] == '-') {
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FILE *prof_input;
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prof_input = fopen("/etc/profile", "r");
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if (!prof_input) {
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printf( "Couldn't open file '/etc/profile'\n");
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} else {
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if (prof_input) {
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int tmp_fd = fileno(prof_input);
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mark_open(tmp_fd);
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/* Now run the file */
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@ -1418,4 +1633,3 @@ int shell_main(int argc_l, char **argv_l)
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return (busy_loop(input));
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}
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234
shell/lash.c
234
shell/lash.c
@ -135,6 +135,7 @@ static void mark_open(int fd);
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static void mark_closed(int fd);
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static void close_all(void);
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static void checkjobs(struct jobset *job_list);
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static void remove_job(struct jobset *j_list, struct job *job);
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static int get_command(FILE * source, char *command);
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static int parse_command(char **command_ptr, struct job *job, int *inbg);
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static int run_command(struct job *newjob, int inbg, int outpipe[2]);
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@ -181,6 +182,8 @@ static struct jobset job_list = { NULL, NULL };
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static int argc;
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static char **argv;
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static struct close_me *close_me_head;
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static int last_return_code;
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static int last_bg_pid;
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static unsigned int last_jobid;
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static int shell_terminal;
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static pid_t shell_pgrp;
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@ -313,8 +316,12 @@ static int builtin_fg_bg(struct child_prog *child)
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job->stopped_progs = 0;
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if (kill(- job->pgrp, SIGCONT) < 0)
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if ( (i=kill(- job->pgrp, SIGCONT)) < 0) {
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if (i == ESRCH) {
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remove_job(&job_list, job);
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}
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perror_msg("kill (SIGCONT)");
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}
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return EXIT_SUCCESS;
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}
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@ -536,6 +543,11 @@ static void remove_job(struct jobset *j_list, struct job *job)
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prevjob->next = job->next;
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}
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if (j_list->head)
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last_jobid = j_list->head->jobid;
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else
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last_jobid = 0;
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free(job);
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}
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@ -576,10 +588,15 @@ static void checkjobs(struct jobset *j_list)
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job->stopped_progs++;
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job->progs[prognum].is_stopped = 1;
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#if 0
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/* Printing this stuff is a pain, since it tends to
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* overwrite the prompt an inconveinient moments. So
|
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* don't do that. */
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if (job->stopped_progs == job->num_progs) {
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printf(JOB_STATUS_FORMAT, job->jobid, "Stopped",
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job->text);
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}
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#endif
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}
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}
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@ -714,14 +731,78 @@ static int get_command(FILE * source, char *command)
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return 0;
|
||||
}
|
||||
|
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static char* itoa(register int i)
|
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{
|
||||
static char a[7]; /* Max 7 ints */
|
||||
register char *b = a + sizeof(a) - 1;
|
||||
int sign = (i < 0);
|
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|
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if (sign)
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i = -i;
|
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*b = 0;
|
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do
|
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{
|
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*--b = '0' + (i % 10);
|
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i /= 10;
|
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}
|
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while (i);
|
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if (sign)
|
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*--b = '-';
|
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return b;
|
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}
|
||||
|
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char * strsep_space( char *string, int * ix)
|
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{
|
||||
char *token, *begin;
|
||||
|
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begin = string;
|
||||
|
||||
/* Short circuit the trivial case */
|
||||
if ( !string || ! string[*ix])
|
||||
return NULL;
|
||||
|
||||
/* Find the end of the token. */
|
||||
while( string && string[*ix] && !isspace(string[*ix]) ) {
|
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(*ix)++;
|
||||
}
|
||||
|
||||
/* Find the end of any whitespace trailing behind
|
||||
* the token and let that be part of the token */
|
||||
while( string && string[*ix] && isspace(string[*ix]) ) {
|
||||
(*ix)++;
|
||||
}
|
||||
|
||||
if (! string && *ix==0) {
|
||||
/* Nothing useful was found */
|
||||
return NULL;
|
||||
}
|
||||
|
||||
token = xmalloc(*ix+1);
|
||||
token[*ix] = '\0';
|
||||
strncpy(token, string, *ix);
|
||||
|
||||
return token;
|
||||
}
|
||||
|
||||
static int expand_arguments(char *command)
|
||||
{
|
||||
int ix = 0;
|
||||
int total_length=0, length, i, retval, ix = 0;
|
||||
expand_t expand_result;
|
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char *tmpcmd, *cmd, *cmd_copy;
|
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char *src, *dst, *var;
|
||||
const char *out_of_space = "out of space during expansion";
|
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int flags = GLOB_NOCHECK
|
||||
#ifdef GLOB_BRACE
|
||||
| GLOB_BRACE
|
||||
#endif
|
||||
#ifdef GLOB_TILDE
|
||||
| GLOB_TILDE
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||||
#endif
|
||||
;
|
||||
|
||||
/* get rid of the terminating \n */
|
||||
chomp(command);
|
||||
|
||||
|
||||
/* Fix up escape sequences to be the Real Thing(tm) */
|
||||
while( command && command[ix]) {
|
||||
if (command[ix] == '\\') {
|
||||
@ -731,6 +812,139 @@ static int expand_arguments(char *command)
|
||||
}
|
||||
ix++;
|
||||
}
|
||||
/* Use glob and then fixup environment variables and such */
|
||||
|
||||
/* It turns out that glob is very stupid. We have to feed it one word at a
|
||||
* time since it can't cope with a full string. Here we convert command
|
||||
* (char*) into cmd (char**, one word per string) */
|
||||
|
||||
/* 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 (ix = 0, tmpcmd = cmd;
|
||||
(tmpcmd = strsep_space(cmd, &ix)) != NULL; cmd += ix, ix=0) {
|
||||
if (*tmpcmd == '\0')
|
||||
break;
|
||||
/* we need to trim() the result for glob! */
|
||||
trim(tmpcmd);
|
||||
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);
|
||||
error_msg(out_of_space);
|
||||
return FALSE;
|
||||
} else if (retval != 0) {
|
||||
/* Some other error. GLOB_NOMATCH shouldn't
|
||||
* happen because of the GLOB_NOCHECK flag in
|
||||
* the glob call. */
|
||||
error_msg("syntax error");
|
||||
return FALSE;
|
||||
} else {
|
||||
/* Convert from char** (one word per string) to a simple char*,
|
||||
* but don't overflow command which is BUFSIZ in length */
|
||||
for (i=0; i < expand_result.gl_pathc; i++) {
|
||||
length=strlen(expand_result.gl_pathv[i]);
|
||||
if (total_length+length+1 >= BUFSIZ) {
|
||||
error_msg(out_of_space);
|
||||
return FALSE;
|
||||
}
|
||||
strcat(command+total_length, " ");
|
||||
total_length+=1;
|
||||
strcat(command+total_length, expand_result.gl_pathv[i]);
|
||||
total_length+=length;
|
||||
}
|
||||
globfree (&expand_result);
|
||||
}
|
||||
}
|
||||
free(cmd_copy);
|
||||
trim(command);
|
||||
|
||||
/* Now do the shell variable substitutions which
|
||||
* wordexp can't do for us, namely $? and $! */
|
||||
src = command;
|
||||
while((dst = strchr(src,'$')) != NULL){
|
||||
var = NULL;
|
||||
switch(*(dst+1)) {
|
||||
case '?':
|
||||
var = itoa(last_return_code);
|
||||
break;
|
||||
case '!':
|
||||
if (last_bg_pid==-1)
|
||||
*(var)='\0';
|
||||
else
|
||||
var = itoa(last_bg_pid);
|
||||
break;
|
||||
/* Everything else like $$, $#, $[0-9], etc. should all be
|
||||
* expanded by wordexp(), so we can in theory skip that stuff
|
||||
* here, but just to be on the safe side (i.e., since uClibc
|
||||
* wordexp doesn't do this stuff yet), lets leave it in for
|
||||
* now. */
|
||||
case '$':
|
||||
var = itoa(getpid());
|
||||
break;
|
||||
case '#':
|
||||
var = itoa(argc-1);
|
||||
break;
|
||||
case '0':case '1':case '2':case '3':case '4':
|
||||
case '5':case '6':case '7':case '8':case '9':
|
||||
{
|
||||
int ixx=*(dst + 1)-48;
|
||||
if (ixx >= argc) {
|
||||
var='\0';
|
||||
} else {
|
||||
var = argv[ixx];
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
}
|
||||
if (var) {
|
||||
/* a single character construction was found, and
|
||||
* already handled in the case statement */
|
||||
src=dst+2;
|
||||
} else {
|
||||
/* Looks like an environment variable */
|
||||
char delim_hold;
|
||||
int num_skip_chars=0;
|
||||
int dstlen = strlen(dst);
|
||||
/* Is this a ${foo} type variable? */
|
||||
if (dstlen >=2 && *(dst+1) == '{') {
|
||||
src=strchr(dst+1, '}');
|
||||
num_skip_chars=1;
|
||||
} else {
|
||||
src=dst+1;
|
||||
while(isalnum(*src) || *src=='_') src++;
|
||||
}
|
||||
if (src == NULL) {
|
||||
src = dst+dstlen;
|
||||
}
|
||||
delim_hold=*src;
|
||||
*src='\0'; /* temporary */
|
||||
var = getenv(dst + 1 + num_skip_chars);
|
||||
*src=delim_hold;
|
||||
src += num_skip_chars;
|
||||
}
|
||||
if (var == NULL) {
|
||||
/* Seems we got an un-expandable variable. So delete it. */
|
||||
var = "";
|
||||
}
|
||||
{
|
||||
int subst_len = strlen(var);
|
||||
int trail_len = strlen(src);
|
||||
if (dst+subst_len+trail_len >= command+BUFSIZ) {
|
||||
error_msg(out_of_space);
|
||||
return FALSE;
|
||||
}
|
||||
/* Move stuff to the end of the string to accommodate
|
||||
* filling the created gap with the new stuff */
|
||||
memmove(dst+subst_len, src, trail_len+1);
|
||||
/* Now copy in the new stuff */
|
||||
memcpy(dst, var, subst_len);
|
||||
src = dst+subst_len;
|
||||
}
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
@ -1078,6 +1292,7 @@ static void insert_job(struct job *newjob, int inbg)
|
||||
printf("[%d] %d\n", thejob->jobid,
|
||||
newjob->progs[newjob->num_progs - 1].pid);
|
||||
last_jobid = newjob->jobid;
|
||||
last_bg_pid=newjob->progs[newjob->num_progs - 1].pid;
|
||||
} else {
|
||||
newjob->job_list->fg = thejob;
|
||||
|
||||
@ -1250,6 +1465,8 @@ static int busy_loop(FILE * input)
|
||||
job_list.fg->running_progs--;
|
||||
job_list.fg->progs[i].pid = 0;
|
||||
|
||||
last_return_code=WEXITSTATUS(status);
|
||||
|
||||
if (!job_list.fg->running_progs) {
|
||||
/* child exited */
|
||||
remove_job(&job_list, job_list.fg);
|
||||
@ -1322,10 +1539,9 @@ static void setup_job_control()
|
||||
signal(SIGCHLD, SIG_IGN);
|
||||
|
||||
/* Put ourselves in our own process group. */
|
||||
setsid();
|
||||
shell_pgrp = getpid ();
|
||||
if (setpgid (shell_pgrp, shell_pgrp) < 0) {
|
||||
perror_msg_and_die("Couldn't put the shell in its own process group");
|
||||
}
|
||||
setpgid (shell_pgrp, shell_pgrp);
|
||||
|
||||
/* Grab control of the terminal. */
|
||||
tcsetpgrp(shell_terminal, shell_pgrp);
|
||||
@ -1345,13 +1561,12 @@ int shell_main(int argc_l, char **argv_l)
|
||||
close_me_head = NULL;
|
||||
job_list.head = NULL;
|
||||
job_list.fg = NULL;
|
||||
last_return_code=1;
|
||||
|
||||
if (argv[0] && argv[0][0] == '-') {
|
||||
FILE *prof_input;
|
||||
prof_input = fopen("/etc/profile", "r");
|
||||
if (!prof_input) {
|
||||
printf( "Couldn't open file '/etc/profile'\n");
|
||||
} else {
|
||||
if (prof_input) {
|
||||
int tmp_fd = fileno(prof_input);
|
||||
mark_open(tmp_fd);
|
||||
/* Now run the file */
|
||||
@ -1418,4 +1633,3 @@ int shell_main(int argc_l, char **argv_l)
|
||||
|
||||
return (busy_loop(input));
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user