diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Makefile.am | 3 | ||||
| -rw-r--r-- | cmd/Makemodule.am | 6 | ||||
| -rw-r--r-- | cmd/killall5.c | 102 |
4 files changed, 112 insertions, 0 deletions
@@ -18,6 +18,7 @@ init service reboot shutdown +killall5 services/agetty services/hostname diff --git a/Makefile.am b/Makefile.am index b1152ed..d0e888e 100644 --- a/Makefile.am +++ b/Makefile.am @@ -7,6 +7,9 @@ sbin_PROGRAMS = noinst_LIBRARIES = EXTRA_DIST = README LICENSE +helperdir = @SCRIPTDIR@ +helper_PROGRAMS = + include lib/Makemodule.am include cmd/Makemodule.am include initd/Makemodule.am diff --git a/cmd/Makemodule.am b/cmd/Makemodule.am index d26b93b..40c0933 100644 --- a/cmd/Makemodule.am +++ b/cmd/Makemodule.am @@ -10,4 +10,10 @@ reboot_CFLAGS = $(AM_CFLAGS) reboot_LDFLAGS = $(AM_LDFLAGS) reboot_LDADD = libinit.a +killall5_SOURCES = cmd/killall5.c +killall5_CPPFLAGS = $(AM_CPPFLAGS) +killall5_CFLAGS = $(AM_CFLAGS) +killall5_LDFLAGS = $(AM_LDFLAGS) + sbin_PROGRAMS += reboot shutdown +helper_PROGRAMS += killall5 diff --git a/cmd/killall5.c b/cmd/killall5.c new file mode 100644 index 0000000..9453d33 --- /dev/null +++ b/cmd/killall5.c @@ -0,0 +1,102 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +/* + * Copyright (C) 2018 - David Oberhollenzer + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ +#include <sys/types.h> +#include <dirent.h> +#include <signal.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <stdio.h> +#include <ctype.h> +#include <errno.h> + +#include "util.h" + +static NORETURN void usage_and_exit(void) +{ + fputs("Usage: killall5 SIGNAL\n", stderr); + exit(EXIT_FAILURE); +} + +int main(int argc, char **argv) +{ + int signo, ret = EXIT_SUCCESS; + pid_t pid, mypid, mysid; + struct dirent *ent; + const char *ptr; + DIR *dir; + + if (argc != 2) + usage_and_exit(); + + ptr = argv[1]; + if (*ptr == '-') + ++ptr; + + if (!isdigit(*ptr)) + usage_and_exit(); + + for (signo = 0; isdigit(*ptr); ++ptr) + signo = signo * 10 + ((*ptr) - '0'); + + if (*ptr != '\0' || signo < 1 || signo > 31) + usage_and_exit(); + + kill(-1, SIGSTOP); + + dir = opendir("/proc"); + if (dir == NULL) { + perror("opendir /proc"); + ret = EXIT_FAILURE; + goto out; + } + + mypid = getpid(); + mysid = getsid(0); + + for (;;) { + errno = 0; + ent = readdir(dir); + + if (ent == NULL) { + if (errno) { + perror("readdir"); + ret = EXIT_FAILURE; + } + break; + } + + if (!isdigit(ent->d_name[0])) + continue; + + for (pid = 0, ptr = ent->d_name; isdigit(*ptr); ++ptr) + pid = pid * 10 + ((*ptr) - '0'); + + if (*ptr != '\0' || pid == mypid || getsid(pid) == mysid) + continue; + + if (kill(pid, signo)) { + ret = EXIT_FAILURE; + fprintf(stderr, "kill %d: %s\n", + (int)pid, strerror(errno)); + } + } +out: + kill(-1, SIGCONT); + return ret; +} |