projects/pwm: proc.c annotate

annotate proc.c @ 40:e3ad9859c51d

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author	Guido Berhoerster <guido+pwm@berhoerster.name>
date	Fri, 09 Aug 2019 14:04:46 +0200
parents	5c6155c8e9b6
children

rev	line source
19 5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	1 /*
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	2 * Copyright (C) 2017 Guido Berhoerster <guido+pwm@berhoerster.name>
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	3 *
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	4 * Permission is hereby granted, free of charge, to any person obtaining
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	5 * a copy of this software and associated documentation files (the
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	6 * "Software"), to deal in the Software without restriction, including
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	7 * without limitation the rights to use, copy, modify, merge, publish,
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	8 * distribute, sublicense, and/or sell copies of the Software, and to
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	9 * permit persons to whom the Software is furnished to do so, subject to
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	10 * the following conditions:
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	11 *
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	12 * The above copyright notice and this permission notice shall be included
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	13 * in all copies or substantial portions of the Software.
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	14 *
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	22 */
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	23
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	24 #include "compat.h"
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	25
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	26 #ifdef HAVE_ERR_H
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	27 #include <err.h>
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	28 #endif /* HAVE_ERR_H */
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	29 #include <errno.h>
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	30 #include <setjmp.h>
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	31 #include <signal.h>
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	32 #include <string.h>
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	33 #include <sys/wait.h>
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	34 #include <unistd.h>
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	35
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	36 #include "util.h"
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	37 #include "proc.h"
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	38 #include "pwm.h"
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	39
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	40 #define PIPE_R 0
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	41 #define PIPE_W 1
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	42
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	43 static sigjmp_buf signal_env;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	44
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	45 static void
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	46 signal_handler(int signal_no)
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	47 {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	48 siglongjmp(signal_env, signal_no);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	49 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	50
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	51 enum io_status
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	52 proc_open(struct proc proc, const char command, const char *type)
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	53 {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	54 int pipe_fds[2];
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	55 pid_t pid;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	56
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	57 if ((strlen(type) != 1) \|\| ((type != 'r') && (type != 'w'))) {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	58 return (IO_ERROR);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	59 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	60
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	61 if (pipe(pipe_fds) < 0) {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	62 return (IO_ERROR);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	63 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	64
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	65 switch (pid = fork()) {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	66 case -1:
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	67 return (IO_ERROR);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	68 case 0:
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	69 if (*type == 'r') {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	70 close(pipe_fds[PIPE_R]);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	71 dup2(pipe_fds[PIPE_W], STDOUT_FILENO);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	72 } else {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	73 close(pipe_fds[PIPE_W]);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	74 dup2(pipe_fds[PIPE_R], STDIN_FILENO);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	75 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	76 closefrom(STDERR_FILENO + 1);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	77 execlp("sh", "sh", "-c", command, (char *)0);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	78 err(1, "execlp");
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	79 default:
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	80 if (*type == 'r') {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	81 close(pipe_fds[PIPE_W]);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	82 proc->fd = pipe_fds[PIPE_R];
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	83 } else {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	84 close(pipe_fds[PIPE_R]);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	85 proc->fd = pipe_fds[PIPE_W];
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	86 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	87 proc->pid = pid;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	88 return (IO_OK);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	89 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	90 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	91
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	92 enum io_status
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	93 proc_close(struct proc *proc)
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	94 {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	95 struct sigaction action;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	96 struct sigaction oaction;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	97 int signal_no = 0;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	98 pid_t wpid;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	99 int status;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	100
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	101 close(proc->fd);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	102
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	103 /* install signal handlers */
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	104 action.sa_handler = signal_handler;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	105 action.sa_flags = 0;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	106 sigemptyset(&action.sa_mask);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	107 sigaddset(&action.sa_mask, SIGINT);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	108 sigaddset(&action.sa_mask, SIGTERM);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	109 sigaddset(&action.sa_mask, SIGHUP);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	110 sigaddset(&action.sa_mask, SIGQUIT);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	111 if ((sigaction(SIGINT, &action, &oaction) != 0) \|\|
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	112 (sigaction(SIGTERM, &action, &oaction) != 0) \|\|
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	113 (sigaction(SIGHUP, &action, &oaction) != 0) \|\|
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	114 (sigaction(SIGQUIT, &action, &oaction) != 0)) {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	115 err(1, "sigaction");
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	116 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	117
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	118 if ((signal_no = sigsetjmp(signal_env, 1)) != 0) {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	119 /*
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	120 * signal received, signal mask has been restored, send SIGTERM
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	121 * to the child process, wait 500 ms and send a SIGKILL if the
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	122 * child still exists
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	123 */
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	124 kill(proc->pid, SIGTERM);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	125 nanosleep(&(struct timespec){ .tv_nsec = 500 * 1000 * 1000 },
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	126 NULL);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	127 do {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	128 wpid = waitpid(proc->pid, &status, WNOHANG);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	129 } while ((wpid == -1) && (errno == EINTR));
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	130 if (wpid == proc->pid) {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	131 goto out;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	132 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	133
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	134 kill(proc->pid, SIGKILL);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	135 do {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	136 wpid = waitpid(proc->pid, &status, 0);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	137 } while ((wpid == -1) && (errno == EINTR));
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	138
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	139 goto out;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	140 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	141
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	142 pwm_unblock_signals();
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	143 do {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	144 wpid = waitpid(proc->pid, &status, 0);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	145 } while ((wpid == -1) && (errno == EINTR));
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	146 pwm_block_signals();
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	147
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	148 out:
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	149 /* restore signal handlers */
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	150 if ((sigaction(SIGINT, &oaction, NULL) != 0) \|\|
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	151 (sigaction(SIGTERM, &oaction, NULL) != 0) \|\|
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	152 (sigaction(SIGHUP, &oaction, NULL) != 0) \|\|
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	153 (sigaction(SIGQUIT, &oaction, NULL) != 0)) {
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	154 err(1, "sigaction");
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	155 }
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	156
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	157 proc->fd = -1;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	158 proc->pid = (pid_t)-1;
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	159
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	160 return ((signal_no == 0) ? IO_OK : IO_SIGNAL);
5c6155c8e9b6 Handle signals Guido Berhoerster <guido+pwm@berhoerster.name> parents: diff changeset	161 }

Mercurial > projects > pwm

annotate proc.c @ 40:e3ad9859c51d