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hush: support $PPID

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function                                             old     new   delta
get_local_var_value                                   33      72     +39
hush_main                                            951     983     +32
block_signals                                        152     155      +3
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(add/remove: 0/0 grow/shrink: 3/0 up/down: 74/0)               Total: 74 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-10-09 15:40:49 +02:00
parent 3f11f35124
commit dea478855f
1 changed files with 15 additions and 4 deletions
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19
shell/hush.c
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@ -484,6 +484,7 @@ struct globals {
line_input_t *line_input_state;
#endif
pid_t root_pid;
pid_t root_ppid;
pid_t last_bg_pid;
#if ENABLE_HUSH_JOB
int run_list_level;
@ -1307,6 +1308,9 @@ static const char *get_local_var_value(const char *name)
struct variable **pp = get_ptr_to_local_var(name);
if (pp)
return strchr((*pp)->varstr, '=') + 1;
if (strcmp(name, "PPID") == 0)
return utoa(G.root_ppid);
// bash compat: UID? EUID?
return NULL;
}
@ -2687,8 +2691,9 @@ static void re_execute_shell(char ***to_free, const char *s,
if (pp) while (*pp++)
cnt++;
sprintf(param_buf, "-$%x:%x:%x:%x" IF_HUSH_LOOPS(":%x")
sprintf(param_buf, "-$%x:%x:%x:%x:%x" IF_HUSH_LOOPS(":%x")
, (unsigned) G.root_pid
, (unsigned) G.root_ppid
, (unsigned) G.last_bg_pid
, (unsigned) G.last_exitcode
, cnt
@ -6510,7 +6515,7 @@ int hush_main(int argc, char **argv)
* MACHTYPE=i386-pc-linux-gnu
* OSTYPE=linux-gnu
* HOSTNAME=<xxxxxxxxxx>
* PPID=<NNNNN>
* PPID=<NNNNN> - we also do it elsewhere
* EUID=<NNNNN>
* UID=<NNNNN>
* GROUPS=()
@ -6587,8 +6592,10 @@ int hush_main(int argc, char **argv)
* Note: this form never happens:
* sh ... -c 'builtin' [BARGV...] ""
*/
if (!G.root_pid)
if (!G.root_pid) {
G.root_pid = getpid();
G.root_ppid = getppid();
}
G.global_argv = argv + optind;
G.global_argc = argc - optind;
if (builtin_argc) {
@ -6630,6 +6637,8 @@ int hush_main(int argc, char **argv)
case '$':
G.root_pid = bb_strtou(optarg, &optarg, 16);
optarg++;
G.root_ppid = bb_strtou(optarg, &optarg, 16);
optarg++;
G.last_bg_pid = bb_strtou(optarg, &optarg, 16);
optarg++;
G.last_exitcode = bb_strtou(optarg, &optarg, 16);
@ -6670,8 +6679,10 @@ int hush_main(int argc, char **argv)
}
} /* option parsing loop */
if (!G.root_pid)
if (!G.root_pid) {
G.root_pid = getpid();
G.root_ppid = getppid();
}
/* If we are login shell... */
if (argv[0] && argv[0][0] == '-') {