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Diffstat (limited to 'bin/kill/kill.c')
| -rw-r--r-- | bin/kill/kill.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/bin/kill/kill.c b/bin/kill/kill.c new file mode 100644 index 000000000000..606c6917bbcf --- /dev/null +++ b/bin/kill/kill.c @@ -0,0 +1,179 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1988, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +/* + * Important: This file is used both as a standalone program /bin/kill and + * as a builtin for /bin/sh (#define SHELL). + */ + +#include <ctype.h> +#include <err.h> +#include <errno.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#ifdef SHELL +#define main killcmd +#include "bltin/bltin.h" +#endif + +static void nosig(const char *); +static void printsignals(FILE *); +static void usage(void) __dead2; + +int +main(int argc, char *argv[]) +{ + char signame[SIG2STR_MAX]; + long pidl; + pid_t pid; + int errors, numsig, ret; + char *ep; + + if (argc < 2) + usage(); + + numsig = SIGTERM; + + argc--, argv++; + if (!strcmp(*argv, "-l")) { + argc--, argv++; + if (argc > 1) + usage(); + if (argc == 1) { + if (!isdigit(**argv)) + usage(); + numsig = strtol(*argv, &ep, 10); + if (!**argv || *ep) + errx(2, "invalid signal number: %s", *argv); + if (numsig >= 128) + numsig -= 128; + if (sig2str(numsig, signame) < 0) + nosig(*argv); + printf("%s\n", signame); + return (0); + } + printsignals(stdout); + return (0); + } + + if (!strcmp(*argv, "-s")) { + argc--, argv++; + if (argc < 1) { + warnx("option requires an argument -- s"); + usage(); + } + if (strcmp(*argv, "0") == 0) + numsig = 0; + else if (str2sig(*argv, &numsig) < 0) + nosig(*argv); + argc--, argv++; + } else if (**argv == '-' && *(*argv + 1) != '-') { + ++*argv; + if (strcmp(*argv, "0") == 0) + numsig = 0; + else if (str2sig(*argv, &numsig) < 0) + nosig(*argv); + argc--, argv++; + } + + if (argc > 0 && strncmp(*argv, "--", 2) == 0) + argc--, argv++; + + if (argc == 0) + usage(); + + for (errors = 0; argc; argc--, argv++) { +#ifdef SHELL + if (**argv == '%') + ret = killjob(*argv, numsig); + else +#endif + { + pidl = strtol(*argv, &ep, 10); + /* Check for overflow of pid_t. */ + pid = (pid_t)pidl; + if (!**argv || *ep || pid != pidl) + errx(2, "illegal process id: %s", *argv); + ret = kill(pid, numsig); + } + if (ret == -1) { + warn("%s", *argv); + errors = 1; + } + } + + return (errors); +} + +static void +nosig(const char *name) +{ + + warnx("unknown signal %s; valid signals:", name); + printsignals(stderr); +#ifdef SHELL + error(NULL); +#else + exit(2); +#endif +} + +static void +printsignals(FILE *fp) +{ + int n; + + for (n = 1; n < sys_nsig; n++) { + (void)fprintf(fp, "%s", sys_signame[n]); + if (n == (sys_nsig / 2) || n == (sys_nsig - 1)) + (void)fprintf(fp, "\n"); + else + (void)fprintf(fp, " "); + } +} + +static void +usage(void) +{ + + (void)fprintf(stderr, "%s\n%s\n%s\n%s\n", + "usage: kill [-s signal_name] pid ...", + " kill -l [exit_status]", + " kill -signal_name pid ...", + " kill -signal_number pid ..."); +#ifdef SHELL + error(NULL); +#else + exit(2); +#endif +} |