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Relocate source files to an src/ subdirectory
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
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Joachim Nilsson committed
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/* Functions for exec'ing processes
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*
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* Copyright (c) 2008-2010 Claudio Matsuoka <cmatsuoka@gmail.com>
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* Copyright (c) 2008-2015 Joachim Nilsson <troglobit@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config.h" /* Generated by configure script */
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#include <ctype.h> /* isdigit() */
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#include <dirent.h>
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#include <stdarg.h>
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#include <sys/prctl.h>
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#include <sys/wait.h>
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#include <lite/lite.h>
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#include "finit.h"
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#include "helpers.h"
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#include "sig.h"
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#include "utmp-api.h"
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#define NUM_ARGS 16
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int getty(char *tty, char *baud, char *term, char *user);
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/* Wait for process completion, returns status of waitpid(2) syscall */
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int complete(char *cmd, int pid)
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{
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int status = 0;
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if (waitpid(pid, &status, 0) == -1) {
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if (errno == EINTR)
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_e("Caught unblocked signal waiting for %s, aborting", cmd);
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else if (errno == ECHILD)
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_e("Caught SIGCHLD waiting for %s, aborting", cmd);
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else
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_e("Failed starting %s, error %d: %s", cmd, errno, strerror (errno));
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return -1;
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}
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return status;
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}
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int run(char *cmd)
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{
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int status, result, i = 0;
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char *args[NUM_ARGS + 1], *arg, *backup;
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pid_t pid;
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/* We must create a copy that is possible to modify. */
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backup = arg = strdup(cmd);
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if (!arg)
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return 1; /* Failed allocating a string to be modified. */
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/* Split command line into tokens of an argv[] array. */
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args[i++] = strsep(&arg, "\t ");
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while (arg && i < NUM_ARGS) {
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/* Handle run("su -c \"dbus-daemon --system\" messagebus");
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* => "su", "-c", "\"dbus-daemon --system\"", "messagebus" */
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if (*arg == '\'' || *arg == '"') {
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char *p, delim[2] = " ";
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delim[0] = arg[0];
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args[i++] = arg++;
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strsep(&arg, delim);
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p = arg - 1;
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*p = *delim;
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*arg++ = 0;
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} else {
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args[i++] = strsep(&arg, "\t ");
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}
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}
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args[i] = NULL;
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if (i == NUM_ARGS && arg) {
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_e("Command too long: %s", cmd);
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free(backup);
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errno = EOVERFLOW;
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return 1;
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}
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pid = fork();
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if (0 == pid) {
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FILE *fp;
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/* Reset signal handlers that were set by the parent process */
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sig_unblock();
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setsid();
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/* Always redirect stdio for run() */
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fp = fopen("/dev/null", "w");
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if (fp) {
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int fd = fileno(fp);
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dup2(fd, STDIN_FILENO);
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dup2(fd, STDOUT_FILENO);
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dup2(fd, STDERR_FILENO);
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}
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sig_unblock();
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execvp(args[0], args);
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_exit(1); /* Only if execv() fails. */
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} else if (-1 == pid) {
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_pe("%s", args[0]);
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free(backup);
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return -1;
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}
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status = complete(args[0], pid);
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if (-1 == status) {
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free(backup);
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return 1;
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}
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result = WEXITSTATUS(status);
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if (WIFEXITED(status)) {
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_d("Started %s and ended OK: %d", args[0], result);
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} else if (WIFSIGNALED(status)) {
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_d("Process %s terminated by signal %d", args[0], WTERMSIG(status));
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if (!result)
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result = 1; /* Must alert callee that the command did complete successfully.
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* This is necessary since not all programs trap signals and
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* change their return code accordingly. --Jocke */
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}
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free(backup);
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return result;
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}
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int run_interactive(char *cmd, char *fmt, ...)
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{
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int status, oldout = 1, olderr = 2;
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char line[LINE_SIZE];
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va_list ap;
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FILE *fp;
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if (!cmd) {
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errno = EINVAL;
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return 1;
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}
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if (!silent && fmt) {
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va_start(ap, fmt);
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vsnprintf(line, sizeof(line), fmt, ap);
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va_end(ap);
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print_desc("", line);
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}
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/* Redirect output from cmd to a tempfile */
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fp = tempfile();
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if (fp && !debug) {
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oldout = dup(STDOUT_FILENO);
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olderr = dup(STDERR_FILENO);
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dup2(fileno(fp), STDOUT_FILENO);
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dup2(fileno(fp), STDERR_FILENO);
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}
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/* Run cmd ... */
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status = run(cmd);
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/* Restore stderr/stdout */
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if (fp && !debug) {
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if (oldout >= 0) {
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dup2(oldout, STDOUT_FILENO);
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close(oldout);
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}
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if (olderr >= 0) {
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dup2(olderr, STDERR_FILENO);
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close(olderr);
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}
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}
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if (!silent && fmt)
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print_result(status);
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/* Dump any results of cmd on stderr after we've printed [ OK ] or [FAIL] */
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if (fp && !debug) {
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size_t len, written;
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rewind(fp);
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do {
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len = fread(line, 1, sizeof(line), fp);
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written = fwrite(line, len, sizeof(char), stderr);
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} while (len > 0 && written == len);
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}
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if (fp)
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fclose(fp);
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return status;
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}
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pid_t run_getty(char *tty, char *speed, char *term, int console)
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{
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pid_t pid;
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pid = fork();
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if (!pid) {
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/* Reset signal handlers that were set by the parent process */
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sig_unblock();
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setsid();
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/* Set INIT_PROCESS UTMP entry */
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utmp_set_init(tty, 0);
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if (console)
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prctl(PR_SET_NAME, "console", 0, 0, 0);
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else
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prctl(PR_SET_NAME, "finit-getty", 0, 0, 0);
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_exit(getty(tty, speed, term, NULL));
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}
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return pid;
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}
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int run_parts(char *dir, char *cmd)
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{
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struct dirent **e;
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int i, num;
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num = scandir(dir, &e, NULL, alphasort);
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if (num < 0) {
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_d("No files found in %s, skipping ...", dir);
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return -1;
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}
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for (i = 0; i < num; i++) {
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int j = 0;
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pid_t pid = 0;
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mode_t mode;
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char *args[NUM_ARGS];
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char *name = e[i]->d_name;
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char path[CMD_SIZE];
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snprintf(path, sizeof(path), "%s/%s", dir, name);
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mode = fmode(path);
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if (!S_ISEXEC(mode) || S_ISDIR(mode)) {
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_d("Skipping %s ...", path);
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continue;
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}
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/* Fill in args[], starting with full path to executable */
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args[j++] = path;
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/* If the callee didn't supply a run_parts() argument */
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if (!cmd) {
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/* Check if S<NUM>service or K<NUM>service notation is used */
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_d("Checking if %s is a sysvinit startstop script ...", name);
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if (name[0] == 'S' && isdigit(name[1])) {
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args[j++] = "start";
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} else if (name[0] == 'K' && isdigit(name[1])) {
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args[j++] = "stop";
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}
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} else {
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args[j++] = cmd;
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}
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args[j++] = NULL;
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pid = fork();
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if (!pid) {
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_d("Calling %s ...", path);
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sig_unblock();
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execv(path, args);
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exit(0);
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}
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complete(path, pid);
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}
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while (num--)
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free(e[num]);
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free(e);
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return 0;
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}
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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