mirror of
https://github.com/sheumann/hush.git
synced 2024-06-04 05:29:30 +00:00
hush: comment out and replace bug in set_local_var:
- if (value == 0 && ++value == 0) {
+ /*if (value == 0 && ++value == 0) ??? -vda */
+ if (value == NULL || value[1] == '\0') {
Style fixes.
This commit is contained in:
Denis Vlasenko
parent
b636d8c18c
commit
f03dbeda90
90
shell/hush.c
90
shell/hush.c
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@ -629,7 +629,6 @@ static int builtin_jobs(struct child_prog *child ATTRIBUTE_UNUSED)
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return EXIT_SUCCESS;
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}
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/* built-in 'pwd' handler */
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static int builtin_pwd(struct child_prog *dummy ATTRIBUTE_UNUSED)
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{
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@ -693,9 +692,8 @@ static int builtin_shift(struct child_prog *child)
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global_argc -= n;
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global_argv += n;
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return EXIT_SUCCESS;
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} else {
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return EXIT_FAILURE;
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}
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return EXIT_FAILURE;
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}
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/* Built-in '.' handler (read-in and execute commands from file) */
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@ -950,13 +948,12 @@ static int file_peek(struct in_str *i)
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{
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if (i->p && *i->p) {
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return *i->p;
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} else {
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i->peek_buf[0] = fgetc(i->file);
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i->peek_buf[1] = '\0';
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i->p = i->peek_buf;
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debug_printf("b_peek: got a %d\n", *i->p);
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return *i->p;
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}
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i->peek_buf[0] = fgetc(i->file);
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i->peek_buf[1] = '\0';
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i->p = i->peek_buf;
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debug_printf("b_peek: got a %d\n", *i->p);
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return *i->p;
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}
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static void setup_file_in_str(struct in_str *i, FILE *f)
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@ -1019,7 +1016,7 @@ static int setup_redirects(struct child_prog *prog, int squirrel[])
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}
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if (redir->dup == -1) {
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mode = redir_table[redir->type].mode;
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openfd = open3_or_warn(redir->word.gl_pathv[0], mode, 0666);
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openfd = open_or_warn(redir->word.gl_pathv[0], mode);
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if (openfd < 0) {
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/* this could get lost if stderr has been redirected, but
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bash and ash both lose it as well (though zsh doesn't!) */
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@ -1038,7 +1035,7 @@ static int setup_redirects(struct child_prog *prog, int squirrel[])
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} else {
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dup2(openfd, redir->fd);
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if (redir->dup == -1)
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close (openfd);
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close(openfd);
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}
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}
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}
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@ -1128,18 +1125,20 @@ static void pseudo_exec(struct child_prog *child)
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execvp(child->argv[0], child->argv);
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bb_perror_msg("cannot exec: %s", child->argv[0]);
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_exit(1);
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} else if (child->group) {
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}
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if (child->group) {
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debug_printf("runtime nesting to group\n");
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interactive = 0; /* crucial!!!! */
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rcode = run_list_real(child->group);
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/* OK to leak memory by not calling free_pipe_list,
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* since this process is about to exit */
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_exit(rcode);
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} else {
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/* Can happen. See what bash does with ">foo" by itself. */
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debug_printf("trying to pseudo_exec null command\n");
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_exit(EXIT_SUCCESS);
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}
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/* Can happen. See what bash does with ">foo" by itself. */
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debug_printf("trying to pseudo_exec null command\n");
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_exit(EXIT_SUCCESS);
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}
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static void insert_bg_job(struct pipe *pi)
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@ -1157,7 +1156,7 @@ static void insert_bg_job(struct pipe *pi)
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thejob = job_list = xmalloc(sizeof(*thejob));
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} else {
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for (thejob = job_list; thejob->next; thejob = thejob->next)
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/* nothing */;
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continue;
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thejob->next = xmalloc(sizeof(*thejob));
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thejob = thejob->next;
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}
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@ -1320,9 +1319,11 @@ static int run_pipe_real(struct pipe *pi)
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rcode = run_list_real(child->group);
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restore_redirects(squirrel);
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return rcode;
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} else if (pi->num_progs == 1 && pi->progs[0].argv != NULL) {
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}
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if (pi->num_progs == 1 && pi->progs[0].argv != NULL) {
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for (i = 0; is_assignment(child->argv[i]); i++)
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/* nothing */;
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continue;
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if (i != 0 && child->argv[i] == NULL) {
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/* assignments, but no command: set the local environment */
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for (i = 0; child->argv[i] != NULL; i++) {
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@ -1359,7 +1360,7 @@ static int run_pipe_real(struct pipe *pi)
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}
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}
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if (child->sp) {
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char *str = NULL;
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char *str;
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str = make_string((child->argv + i));
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parse_string_outer(str, FLAG_EXIT_FROM_LOOP | FLAG_REPARSING);
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@ -1372,7 +1373,7 @@ static int run_pipe_real(struct pipe *pi)
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int rcode;
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if (x->function == builtin_exec && child->argv[i+1] == NULL) {
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debug_printf("magic exec\n");
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setup_redirects(child,NULL);
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setup_redirects(child, NULL);
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return EXIT_SUCCESS;
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}
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debug_printf("builtin inline %s\n", child->argv[0]);
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@ -1404,7 +1405,7 @@ static int run_pipe_real(struct pipe *pi)
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}
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/* XXX test for failed fork()? */
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#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
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#if BB_MMU
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child->pid = fork();
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#else
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child->pid = vfork();
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@ -1435,7 +1436,7 @@ static int run_pipe_real(struct pipe *pi)
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/* Like bash, explicit redirects override pipes,
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* and the pipe fd is available for dup'ing. */
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setup_redirects(child,NULL);
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setup_redirects(child, NULL);
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if (interactive && pi->followup != PIPE_BG) {
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/* If we (the child) win the race, put ourselves in the process
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@ -1803,11 +1804,12 @@ static int set_local_var(const char *s, int flg_export)
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* NAME=VALUE format. So the first order of business is to
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* split 's' on the '=' into 'name' and 'value' */
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value = strchr(name, '=');
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if (value == 0 && ++value == 0) {
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/*if (value == 0 && ++value == 0) ??? -vda */
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if (value == NULL || value[1] == '\0') {
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free(name);
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return -1;
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}
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*value++ = 0;
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*value++ = '\0';
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for (cur = top_vars; cur; cur = cur->next) {
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if (strcmp(cur->name, name) == 0)
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@ -1820,17 +1822,15 @@ static int set_local_var(const char *s, int flg_export)
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cur->flg_export = flg_export;
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else
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result++;
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} else if (cur->flg_read_only) {
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bb_error_msg("%s: readonly variable", name);
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result = -1;
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} else {
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if (cur->flg_read_only) {
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bb_error_msg("%s: readonly variable", name);
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result = -1;
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} else {
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if (flg_export > 0 || cur->flg_export > 1)
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cur->flg_export = 1;
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free((char*)cur->value);
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if (flg_export > 0 || cur->flg_export > 1)
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cur->flg_export = 1;
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free((char*)cur->value);
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cur->value = strdup(value);
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}
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cur->value = strdup(value);
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}
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} else {
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cur = malloc(sizeof(struct variables));
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@ -2213,7 +2213,7 @@ static FILE *generate_stream_from_list(struct pipe *head)
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FILE *pf;
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int pid, channel[2];
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if (pipe(channel) < 0) bb_perror_msg_and_die("pipe");
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#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
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#if BB_MMU
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pid = fork();
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#else
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pid = vfork();
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@ -2576,14 +2576,15 @@ int parse_stream(o_string *dest, struct p_context *ctx,
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* one before the EOF. Can't use the standard "syntax error" return code,
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* so that parse_stream_outer can distinguish the EOF and exit smoothly. */
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debug_printf("leaving parse_stream (EOF)\n");
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if (end_trigger != '\0') return -1;
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if (end_trigger != '\0')
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return -1;
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return 0;
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}
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static void mapset(const char *set, int code)
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{
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const unsigned char *s;
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for (s = (const unsigned char *)set; *s; s++) map[(int)*s] = code;
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while (*s)
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map[(unsigned char)*s++] = code;
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}
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static void update_ifs_map(void)
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@ -2607,7 +2608,6 @@ static void update_ifs_map(void)
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* from builtin_source() */
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int parse_stream_outer(struct in_str *inp, int flag)
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{
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struct p_context ctx;
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o_string temp = NULL_O_STRING;
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int rcode;
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@ -2729,7 +2729,8 @@ int hush_main(int argc, char **argv)
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if (argv[0] && argv[0][0] == '-') {
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debug_printf("\nsourcing /etc/profile\n");
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if ((input = fopen("/etc/profile", "r")) != NULL) {
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input = fopen("/etc/profile", "r");
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if (input != NULL) {
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mark_open(fileno(input));
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parse_file_outer(input);
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mark_closed(fileno(input));
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@ -2816,7 +2817,7 @@ int hush_main(int argc, char **argv)
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}
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#endif
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final_return:
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final_return:
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return opt ? opt : last_return_code;
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}
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@ -2877,7 +2878,8 @@ static char **make_list_in(char **inp, char *name)
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p1++;
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continue;
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}
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if ((p2 = strchr(p1, ' '))) {
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p2 = strchr(p1, ' ');
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if (p2) {
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len = p2 - p1;
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} else {
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len = strlen(p1);
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@ -2920,7 +2922,7 @@ static char* make_string(char ** inp)
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if (p != inp[n]) free(p);
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}
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len = strlen(str);
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*(str + len) = '\n';
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*(str + len + 1) = '\0';
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str[len] = '\n';
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str[len+1] = '\0';
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return str;
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}
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