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| author | Denis Vlasenko | 2007-03-31 11:08:50 +0000 |
|---|---|---|
| committer | Denis Vlasenko | 2007-03-31 11:08:50 +0000 |
| commit | f443bffd3c24c4b7fcbc0472c75e747e26c24fef (patch) | |
| tree | 1a3f2288876dbe660b5f73c0b275821c6f8094d6 | |
| parent | 6fa8b8e17f8b3ceb16172fe64fcc97860bf79d21 (diff) | |
| download | busybox-f443bffd3c24c4b7fcbc0472c75e747e26c24fef.zip busybox-f443bffd3c24c4b7fcbc0472c75e747e26c24fef.tar.gz | |
lash: make -c work; crush buffer overrun and free of non-malloced ptr
(from Mats Erik Andersson <mats.andersson64@comhem.se>)
| -rw-r--r-- | shell/lash.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/shell/lash.c b/shell/lash.c index 99b6173..58d770f 100644 --- a/shell/lash.c +++ b/shell/lash.c @@ -114,7 +114,7 @@ static int builtin_read(struct child_prog *cmd); /* function prototypes for shell stuff */ static void checkjobs(struct jobset *job_list); static void remove_job(struct jobset *j_list, struct job *job); -static int get_command(FILE * source, char *command); +static int get_command_bufsiz(FILE * source, char *command); static int parse_command(char **command_ptr, struct job *job, int *inbg); static int run_command(struct job *newjob, int inbg, int outpipe[2]); static int pseudo_exec(struct child_prog *cmd) ATTRIBUTE_NORETURN; @@ -649,15 +649,14 @@ static inline const char* setup_prompt_string(void) static line_input_t *line_input_state; #endif -static int get_command(FILE * source, char *command) +static int get_command_bufsiz(FILE * source, char *command) { const char *prompt_str; if (source == NULL) { if (local_pending_command) { /* a command specified (-c option): return it & mark it done */ - strcpy(command, local_pending_command); - free(local_pending_command); + strncpy(command, local_pending_command, BUFSIZ); local_pending_command = NULL; return 0; } @@ -1363,12 +1362,12 @@ static int busy_loop(FILE * input) checkjobs(&job_list); if (!next_command) { - if (get_command(input, command)) + if (get_command_bufsiz(input, command)) break; next_command = command; } - if (! expand_arguments(next_command)) { + if (!expand_arguments(next_command)) { free(command); command = xzalloc(BUFSIZ); next_command = NULL; @@ -1455,8 +1454,6 @@ static void free_memory(void) if (cwd && cwd != bb_msg_unknown) { free((char*)cwd); } - if (local_pending_command) - free(local_pending_command); if (job_list.fg && !job_list.fg->running_progs) { remove_job(&job_list, job_list.fg); @@ -1538,7 +1535,7 @@ int lash_main(int argc_l, char **argv_l) opt = getopt32(argc_l, argv_l, "+ic:", &local_pending_command); #define LASH_OPT_i (1<<0) -#define LASH_OPT_c (1<<2) +#define LASH_OPT_c (1<<1) if (opt & LASH_OPT_c) { input = NULL; optind++; |