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shell: fix script's comm field if ENABLE_FEATURE_PREFER_APPLETS=y

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function                                             old     new   delta
re_execed_comm                                         -      46     +46
main                                                  72      86     +14
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(add/remove: 1/0 grow/shrink: 1/0 up/down: 60/0)               Total: 60 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2021-10-11 18:39:25 +02:00
parent 23aba8a9a6
commit 5acf5e1f87
7 changed files with 78 additions and 2 deletions
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16
libbb/vfork_daemon_rexec.c
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@@ -28,6 +28,22 @@
# ifndef PR_GET_NAME
# define PR_GET_NAME 16
# endif
# if ENABLE_FEATURE_SH_STANDALONE || ENABLE_FEATURE_PREFER_APPLETS || !BB_MMU
int FAST_FUNC re_execed_comm(void)
{
const char *e, *expected_comm;
char comm[16];
BUILD_BUG_ON(CONFIG_BUSYBOX_EXEC_PATH[0] != '/');
e = CONFIG_BUSYBOX_EXEC_PATH;
/* Hopefully (strrchr(e) - e) evaluates to constant at compile time: */
expected_comm = bb_busybox_exec_path + (strrchr(e, '/') - e) + 1;
prctl(PR_GET_NAME, (long)comm, 0, 0, 0);
//bb_error_msg("comm:'%.*s' expected:'%s'", 16, comm, expected_comm);
return strcmp(comm, expected_comm) == 0;
}
# endif
void FAST_FUNC set_task_comm(const char *comm)
{
/* okay if too long (truncates) */