Patch from larry doolittle to be ever so careful to cleanup
all open file descriptors, lest wierdness happen later.
This commit is contained in:
Eric Andersen
parent
0bcc813a34
commit
8ea28be6d2
88
lash.c
88
lash.c
@ -25,6 +25,12 @@
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*
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*/
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/* The parsing engine of this program is officially at a dead-end.
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* Future work in that direction should move to the work posted
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* at http://doolittle.faludi.com/~larry/parser.html .
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* A start on the integration of that work with the rest of sh.c
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* is at http://codepoet.org/sh.c .
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*/
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//
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//This works pretty well now, and is now on by default.
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#define BB_FEATURE_SH_ENVIRONMENT
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@ -117,6 +123,11 @@ struct built_in_command {
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int (*function) (struct child_prog *); /* function ptr */
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};
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struct close_me {
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int fd;
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struct close_me *next;
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};
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/* function prototypes for builtins */
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static int builtin_cd(struct child_prog *cmd);
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static int builtin_env(struct child_prog *dummy);
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@ -141,6 +152,8 @@ static int run_command_predicate(char *cmd);
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/* function prototypes for shell stuff */
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static void mark_open(int fd);
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static void mark_closed(int fd);
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static void checkjobs(struct jobset *job_list);
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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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@ -194,6 +207,7 @@ static char *local_pending_command;
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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 = NULL;
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#ifdef BB_FEATURE_SH_ENVIRONMENT
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static int last_bg_pid=-1;
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static int last_return_code=-1;
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@ -545,6 +559,7 @@ static int builtin_source(struct child_prog *child)
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{
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FILE *input;
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int status;
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int fd;
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if (child->argv[1] == NULL)
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return EXIT_FAILURE;
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@ -555,9 +570,12 @@ static int builtin_source(struct child_prog *child)
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return EXIT_FAILURE;
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}
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fd=fileno(input);
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mark_open(fd);
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/* Now run the file */
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status = busy_loop(input);
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fclose(input);
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mark_closed(fd);
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return (status);
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}
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@ -592,6 +610,34 @@ static int run_command_predicate(char *cmd)
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}
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#endif
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static void mark_open(int fd)
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{
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struct close_me *new = xmalloc(sizeof(struct close_me));
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new->fd = fd;
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new->next = close_me_head;
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close_me_head = new;
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}
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static void mark_closed(int fd)
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{
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struct close_me *tmp;
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if (close_me_head == NULL || close_me_head->fd != fd)
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error_msg_and_die("corrupt close_me");
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tmp = close_me_head;
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close_me_head = close_me_head->next;
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free(tmp);
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}
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static void close_all()
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{
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struct close_me *c;
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for (c=close_me_head; c; c=c->next) {
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close(c->fd);
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}
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close_me_head = NULL;
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}
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/* free up all memory from a job */
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static void free_job(struct job *cmd)
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{
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@ -767,7 +813,7 @@ static char* setup_prompt_string(int state)
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static int get_command(FILE * source, char *command)
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{
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char *prompt_str;
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if (source == NULL) {
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if (local_pending_command) {
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/* a command specified (-c option): return it & mark it done */
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@ -781,7 +827,7 @@ static int get_command(FILE * source, char *command)
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if (source == stdin) {
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prompt_str = setup_prompt_string(shell_context);
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#ifdef BB_FEATURE_SH_COMMAND_EDITING
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/*
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** enable command line editing only while a command line
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@ -791,11 +837,12 @@ static int get_command(FILE * source, char *command)
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*/
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cmdedit_init();
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cmdedit_read_input(prompt_str, command);
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free( prompt_str);
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free(prompt_str);
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cmdedit_terminate();
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return 0;
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#else
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fprintf(stdout, "%s", prompt_str);
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fputs(prompt_str, stdout);
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free(prompt_str);
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#endif
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}
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@ -1151,6 +1198,9 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
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#ifdef BB_FEATURE_SH_BACKTICKS
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case '`':
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/* Exec a backtick-ed command */
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/* Besides any previous brokenness, I have not
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* updated backtick handling for close_me support.
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* I don't know if it needs it or not. -- LRD */
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{
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char* charptr1=NULL, *charptr2;
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char* ptr=NULL;
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@ -1359,8 +1409,7 @@ static int pseudo_exec(struct child_prog *child)
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#endif
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execvp(child->argv[0], child->argv);
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error_msg_and_die("%s: %s\n", child->argv[0],
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strerror(errno));
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perror_msg_and_die("%s", child->argv[0]);
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}
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static void insert_job(struct job *newjob, int inbg)
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@ -1464,6 +1513,8 @@ static int run_command(struct job *newjob, int inbg, int outpipe[2])
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if (!(child->pid = fork())) {
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signal(SIGTTOU, SIG_DFL);
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close_all();
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if (outpipe[1]!=-1) {
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close(outpipe[0]);
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}
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@ -1559,7 +1610,8 @@ static int busy_loop(FILE * input)
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while (!job_list.fg->progs[i].pid ||
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job_list.fg->progs[i].is_stopped == 1) i++;
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waitpid(job_list.fg->progs[i].pid, &status, WUNTRACED);
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if (waitpid(job_list.fg->progs[i].pid, &status, WUNTRACED)<0)
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perror_msg_and_die("waitpid(%d)",job_list.fg->progs[i].pid);
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if (WIFEXITED(status) || WIFSIGNALED(status)) {
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/* the child exited */
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@ -1649,15 +1701,18 @@ int shell_main(int argc_l, char **argv_l)
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#endif
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if (argv[0] && argv[0][0] == '-') {
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FILE *input;
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input = fopen("/etc/profile", "r");
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if (!input) {
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fprintf(stdout, "Couldn't open file '/etc/profile'\n");
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} else {
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/* Now run the file */
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busy_loop(input);
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fclose(input);
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}
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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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fprintf(stdout, "Couldn't open file '/etc/profile'\n");
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} else {
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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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busy_loop(prof_input);
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fclose(prof_input);
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mark_closed(tmp_fd);
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}
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}
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while ((opt = getopt(argc_l, argv_l, "cxi")) > 0) {
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@ -1701,6 +1756,7 @@ int shell_main(int argc_l, char **argv_l)
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} else if (local_pending_command==NULL) {
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//fprintf(stdout, "optind=%d argv[optind]='%s'\n", optind, argv[optind]);
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input = xfopen(argv[optind], "r");
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mark_open(fileno(input)); /* be lazy, never mark this closed */
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}
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/* initialize the cwd -- this is never freed...*/
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88
sh.c
88
sh.c
@ -25,6 +25,12 @@
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*
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*/
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/* The parsing engine of this program is officially at a dead-end.
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* Future work in that direction should move to the work posted
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* at http://doolittle.faludi.com/~larry/parser.html .
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* A start on the integration of that work with the rest of sh.c
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* is at http://codepoet.org/sh.c .
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*/
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//
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//This works pretty well now, and is now on by default.
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#define BB_FEATURE_SH_ENVIRONMENT
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@ -117,6 +123,11 @@ struct built_in_command {
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int (*function) (struct child_prog *); /* function ptr */
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};
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struct close_me {
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int fd;
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struct close_me *next;
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};
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/* function prototypes for builtins */
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static int builtin_cd(struct child_prog *cmd);
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static int builtin_env(struct child_prog *dummy);
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@ -141,6 +152,8 @@ static int run_command_predicate(char *cmd);
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/* function prototypes for shell stuff */
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static void mark_open(int fd);
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static void mark_closed(int fd);
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static void checkjobs(struct jobset *job_list);
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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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@ -194,6 +207,7 @@ static char *local_pending_command;
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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 = NULL;
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#ifdef BB_FEATURE_SH_ENVIRONMENT
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static int last_bg_pid=-1;
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static int last_return_code=-1;
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@ -545,6 +559,7 @@ static int builtin_source(struct child_prog *child)
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{
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FILE *input;
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int status;
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int fd;
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if (child->argv[1] == NULL)
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return EXIT_FAILURE;
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@ -555,9 +570,12 @@ static int builtin_source(struct child_prog *child)
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return EXIT_FAILURE;
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}
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fd=fileno(input);
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mark_open(fd);
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/* Now run the file */
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status = busy_loop(input);
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fclose(input);
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mark_closed(fd);
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return (status);
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}
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@ -592,6 +610,34 @@ static int run_command_predicate(char *cmd)
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}
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#endif
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static void mark_open(int fd)
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{
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struct close_me *new = xmalloc(sizeof(struct close_me));
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new->fd = fd;
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new->next = close_me_head;
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close_me_head = new;
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}
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static void mark_closed(int fd)
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{
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struct close_me *tmp;
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if (close_me_head == NULL || close_me_head->fd != fd)
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error_msg_and_die("corrupt close_me");
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tmp = close_me_head;
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close_me_head = close_me_head->next;
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free(tmp);
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}
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static void close_all()
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{
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struct close_me *c;
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for (c=close_me_head; c; c=c->next) {
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close(c->fd);
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}
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close_me_head = NULL;
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}
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/* free up all memory from a job */
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static void free_job(struct job *cmd)
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{
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@ -767,7 +813,7 @@ static char* setup_prompt_string(int state)
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static int get_command(FILE * source, char *command)
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{
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char *prompt_str;
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if (source == NULL) {
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if (local_pending_command) {
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/* a command specified (-c option): return it & mark it done */
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@ -781,7 +827,7 @@ static int get_command(FILE * source, char *command)
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if (source == stdin) {
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prompt_str = setup_prompt_string(shell_context);
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#ifdef BB_FEATURE_SH_COMMAND_EDITING
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/*
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** enable command line editing only while a command line
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@ -791,11 +837,12 @@ static int get_command(FILE * source, char *command)
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*/
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cmdedit_init();
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cmdedit_read_input(prompt_str, command);
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free( prompt_str);
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free(prompt_str);
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cmdedit_terminate();
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return 0;
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#else
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fprintf(stdout, "%s", prompt_str);
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fputs(prompt_str, stdout);
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free(prompt_str);
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#endif
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}
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@ -1151,6 +1198,9 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
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#ifdef BB_FEATURE_SH_BACKTICKS
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case '`':
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/* Exec a backtick-ed command */
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/* Besides any previous brokenness, I have not
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* updated backtick handling for close_me support.
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* I don't know if it needs it or not. -- LRD */
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{
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char* charptr1=NULL, *charptr2;
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char* ptr=NULL;
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@ -1359,8 +1409,7 @@ static int pseudo_exec(struct child_prog *child)
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#endif
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execvp(child->argv[0], child->argv);
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error_msg_and_die("%s: %s\n", child->argv[0],
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strerror(errno));
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perror_msg_and_die("%s", child->argv[0]);
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}
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static void insert_job(struct job *newjob, int inbg)
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@ -1464,6 +1513,8 @@ static int run_command(struct job *newjob, int inbg, int outpipe[2])
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if (!(child->pid = fork())) {
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signal(SIGTTOU, SIG_DFL);
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close_all();
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if (outpipe[1]!=-1) {
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close(outpipe[0]);
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}
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@ -1559,7 +1610,8 @@ static int busy_loop(FILE * input)
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while (!job_list.fg->progs[i].pid ||
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job_list.fg->progs[i].is_stopped == 1) i++;
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waitpid(job_list.fg->progs[i].pid, &status, WUNTRACED);
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if (waitpid(job_list.fg->progs[i].pid, &status, WUNTRACED)<0)
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perror_msg_and_die("waitpid(%d)",job_list.fg->progs[i].pid);
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if (WIFEXITED(status) || WIFSIGNALED(status)) {
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/* the child exited */
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@ -1649,15 +1701,18 @@ int shell_main(int argc_l, char **argv_l)
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#endif
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if (argv[0] && argv[0][0] == '-') {
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FILE *input;
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input = fopen("/etc/profile", "r");
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if (!input) {
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fprintf(stdout, "Couldn't open file '/etc/profile'\n");
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} else {
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/* Now run the file */
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busy_loop(input);
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fclose(input);
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}
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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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fprintf(stdout, "Couldn't open file '/etc/profile'\n");
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} else {
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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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busy_loop(prof_input);
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fclose(prof_input);
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mark_closed(tmp_fd);
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}
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}
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while ((opt = getopt(argc_l, argv_l, "cxi")) > 0) {
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@ -1701,6 +1756,7 @@ int shell_main(int argc_l, char **argv_l)
|
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} else if (local_pending_command==NULL) {
|
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//fprintf(stdout, "optind=%d argv[optind]='%s'\n", optind, argv[optind]);
|
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input = xfopen(argv[optind], "r");
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mark_open(fileno(input)); /* be lazy, never mark this closed */
|
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}
|
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|
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/* initialize the cwd -- this is never freed...*/
|
||||
|
||||
88
shell/lash.c
88
shell/lash.c
@ -25,6 +25,12 @@
|
||||
*
|
||||
*/
|
||||
|
||||
/* The parsing engine of this program is officially at a dead-end.
|
||||
* Future work in that direction should move to the work posted
|
||||
* at http://doolittle.faludi.com/~larry/parser.html .
|
||||
* A start on the integration of that work with the rest of sh.c
|
||||
* is at http://codepoet.org/sh.c .
|
||||
*/
|
||||
//
|
||||
//This works pretty well now, and is now on by default.
|
||||
#define BB_FEATURE_SH_ENVIRONMENT
|
||||
@ -117,6 +123,11 @@ struct built_in_command {
|
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int (*function) (struct child_prog *); /* function ptr */
|
||||
};
|
||||
|
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struct close_me {
|
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int fd;
|
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struct close_me *next;
|
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};
|
||||
|
||||
/* function prototypes for builtins */
|
||||
static int builtin_cd(struct child_prog *cmd);
|
||||
static int builtin_env(struct child_prog *dummy);
|
||||
@ -141,6 +152,8 @@ static int run_command_predicate(char *cmd);
|
||||
|
||||
|
||||
/* function prototypes for shell stuff */
|
||||
static void mark_open(int fd);
|
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static void mark_closed(int fd);
|
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static void checkjobs(struct jobset *job_list);
|
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static int get_command(FILE * source, char *command);
|
||||
static int parse_command(char **command_ptr, struct job *job, int *inbg);
|
||||
@ -194,6 +207,7 @@ static char *local_pending_command;
|
||||
static struct jobset job_list = { NULL, NULL };
|
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static int argc;
|
||||
static char **argv;
|
||||
static struct close_me *close_me_head = NULL;
|
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#ifdef BB_FEATURE_SH_ENVIRONMENT
|
||||
static int last_bg_pid=-1;
|
||||
static int last_return_code=-1;
|
||||
@ -545,6 +559,7 @@ static int builtin_source(struct child_prog *child)
|
||||
{
|
||||
FILE *input;
|
||||
int status;
|
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int fd;
|
||||
|
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if (child->argv[1] == NULL)
|
||||
return EXIT_FAILURE;
|
||||
@ -555,9 +570,12 @@ static int builtin_source(struct child_prog *child)
|
||||
return EXIT_FAILURE;
|
||||
}
|
||||
|
||||
fd=fileno(input);
|
||||
mark_open(fd);
|
||||
/* Now run the file */
|
||||
status = busy_loop(input);
|
||||
fclose(input);
|
||||
mark_closed(fd);
|
||||
return (status);
|
||||
}
|
||||
|
||||
@ -592,6 +610,34 @@ static int run_command_predicate(char *cmd)
|
||||
}
|
||||
#endif
|
||||
|
||||
static void mark_open(int fd)
|
||||
{
|
||||
struct close_me *new = xmalloc(sizeof(struct close_me));
|
||||
new->fd = fd;
|
||||
new->next = close_me_head;
|
||||
close_me_head = new;
|
||||
}
|
||||
|
||||
static void mark_closed(int fd)
|
||||
{
|
||||
struct close_me *tmp;
|
||||
if (close_me_head == NULL || close_me_head->fd != fd)
|
||||
error_msg_and_die("corrupt close_me");
|
||||
tmp = close_me_head;
|
||||
close_me_head = close_me_head->next;
|
||||
free(tmp);
|
||||
}
|
||||
|
||||
static void close_all()
|
||||
{
|
||||
struct close_me *c;
|
||||
for (c=close_me_head; c; c=c->next) {
|
||||
close(c->fd);
|
||||
}
|
||||
close_me_head = NULL;
|
||||
}
|
||||
|
||||
|
||||
/* free up all memory from a job */
|
||||
static void free_job(struct job *cmd)
|
||||
{
|
||||
@ -767,7 +813,7 @@ static char* setup_prompt_string(int state)
|
||||
static int get_command(FILE * source, char *command)
|
||||
{
|
||||
char *prompt_str;
|
||||
|
||||
|
||||
if (source == NULL) {
|
||||
if (local_pending_command) {
|
||||
/* a command specified (-c option): return it & mark it done */
|
||||
@ -781,7 +827,7 @@ static int get_command(FILE * source, char *command)
|
||||
|
||||
if (source == stdin) {
|
||||
prompt_str = setup_prompt_string(shell_context);
|
||||
|
||||
|
||||
#ifdef BB_FEATURE_SH_COMMAND_EDITING
|
||||
/*
|
||||
** enable command line editing only while a command line
|
||||
@ -791,11 +837,12 @@ static int get_command(FILE * source, char *command)
|
||||
*/
|
||||
cmdedit_init();
|
||||
cmdedit_read_input(prompt_str, command);
|
||||
free( prompt_str);
|
||||
free(prompt_str);
|
||||
cmdedit_terminate();
|
||||
return 0;
|
||||
#else
|
||||
fprintf(stdout, "%s", prompt_str);
|
||||
fputs(prompt_str, stdout);
|
||||
free(prompt_str);
|
||||
#endif
|
||||
}
|
||||
|
||||
@ -1151,6 +1198,9 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
|
||||
#ifdef BB_FEATURE_SH_BACKTICKS
|
||||
case '`':
|
||||
/* Exec a backtick-ed command */
|
||||
/* Besides any previous brokenness, I have not
|
||||
* updated backtick handling for close_me support.
|
||||
* I don't know if it needs it or not. -- LRD */
|
||||
{
|
||||
char* charptr1=NULL, *charptr2;
|
||||
char* ptr=NULL;
|
||||
@ -1359,8 +1409,7 @@ static int pseudo_exec(struct child_prog *child)
|
||||
#endif
|
||||
|
||||
execvp(child->argv[0], child->argv);
|
||||
error_msg_and_die("%s: %s\n", child->argv[0],
|
||||
strerror(errno));
|
||||
perror_msg_and_die("%s", child->argv[0]);
|
||||
}
|
||||
|
||||
static void insert_job(struct job *newjob, int inbg)
|
||||
@ -1464,6 +1513,8 @@ static int run_command(struct job *newjob, int inbg, int outpipe[2])
|
||||
if (!(child->pid = fork())) {
|
||||
signal(SIGTTOU, SIG_DFL);
|
||||
|
||||
close_all();
|
||||
|
||||
if (outpipe[1]!=-1) {
|
||||
close(outpipe[0]);
|
||||
}
|
||||
@ -1559,7 +1610,8 @@ static int busy_loop(FILE * input)
|
||||
while (!job_list.fg->progs[i].pid ||
|
||||
job_list.fg->progs[i].is_stopped == 1) i++;
|
||||
|
||||
waitpid(job_list.fg->progs[i].pid, &status, WUNTRACED);
|
||||
if (waitpid(job_list.fg->progs[i].pid, &status, WUNTRACED)<0)
|
||||
perror_msg_and_die("waitpid(%d)",job_list.fg->progs[i].pid);
|
||||
|
||||
if (WIFEXITED(status) || WIFSIGNALED(status)) {
|
||||
/* the child exited */
|
||||
@ -1649,15 +1701,18 @@ int shell_main(int argc_l, char **argv_l)
|
||||
#endif
|
||||
|
||||
if (argv[0] && argv[0][0] == '-') {
|
||||
FILE *input;
|
||||
input = fopen("/etc/profile", "r");
|
||||
if (!input) {
|
||||
fprintf(stdout, "Couldn't open file '/etc/profile'\n");
|
||||
} else {
|
||||
/* Now run the file */
|
||||
busy_loop(input);
|
||||
fclose(input);
|
||||
}
|
||||
FILE *prof_input;
|
||||
prof_input = fopen("/etc/profile", "r");
|
||||
if (!prof_input) {
|
||||
fprintf(stdout, "Couldn't open file '/etc/profile'\n");
|
||||
} else {
|
||||
int tmp_fd = fileno(prof_input);
|
||||
mark_open(tmp_fd);
|
||||
/* Now run the file */
|
||||
busy_loop(prof_input);
|
||||
fclose(prof_input);
|
||||
mark_closed(tmp_fd);
|
||||
}
|
||||
}
|
||||
|
||||
while ((opt = getopt(argc_l, argv_l, "cxi")) > 0) {
|
||||
@ -1701,6 +1756,7 @@ int shell_main(int argc_l, char **argv_l)
|
||||
} else if (local_pending_command==NULL) {
|
||||
//fprintf(stdout, "optind=%d argv[optind]='%s'\n", optind, argv[optind]);
|
||||
input = xfopen(argv[optind], "r");
|
||||
mark_open(fileno(input)); /* be lazy, never mark this closed */
|
||||
}
|
||||
|
||||
/* initialize the cwd -- this is never freed...*/
|
||||
|
||||
Loading…
Reference in New Issue
Block a user