/**
* Copyright © 2015 Mattias Andrée <maandree@member.fsf.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "daemon.h"
/**
* Quote a string, in shell (Bash-only if necessary) compatible
* format, if necessary. Here, just adding quotes around all not
* do. The string must be single line, and there must not be
* any invisible characters; it should be possible to copy
* a string from the terminal by marking it, hence all of this
* ugliness.
*
* @param str The string.
* @return Return a safe representation of the string,
* `NULL` on error.
*/
static char *
quote(const char *str)
{
#define UNSAFE(c) strchr(" \"$()[]{};|&^#!?*~`<>", c)
size_t in = 0; /* < ' ' */
size_t sn = 0; /* in UNSAFE */
size_t bn = 0; /* = '\\' */
size_t qn = 0; /* = '\'' */
size_t rn = 0; /* other */
size_t n, i = 0;
const unsigned char *s;
char *rc;
for (s = (const unsigned char *)str; *s; s++) {
if (*s < ' ') in++;
else if (UNSAFE(*s)) sn++;
else if (*s == '\\') bn++;
else if (*s == '\'') qn++;
else rn++;
}
switch (in ? 2 : (sn + bn + qn) ? 1 : 0) {
case 0:
return strdup(str);
case 1:
n = rn + sn + bn + 4 * qn + 4 * in + 2;
t (!(rc = malloc((n + 1) * sizeof(char))));
rc[i++] = '\'';
for (s = (const unsigned char *)str; *s; s++) {
rc[i++] = (char)*s;
if (*s == '\'')
rc[i++] = '\\', rc[i++] = '\'', rc[i++] = '\'';
}
rc[i++] = '\'';
rc[i] = '\0';
return rc;
case 2:
n = 4 * in + rn + sn + 2 * bn + 2 * qn + 3;
t (!(rc = malloc((n + 1) * sizeof(char))));
rc[i++] = '$';
rc[i++] = '\'';
for (s = (const unsigned char *)str; *s; s++) {
if (*s < ' ') {
rc[i++] = '\\';
rc[i++] = 'x';
rc[i++] = "0123456789ABCDEF"[(*s >> 4) & 15];
rc[i++] = "0123456789ABCDEF"[(*s >> 0) & 15];
}
else if (*s == '\\') rc[i++] = '\\', rc[i++] = (char)*s;
else if (*s == '\'') rc[i++] = '\\', rc[i++] = (char)*s;
else rc[i++] = (char)*s;
}
rc[i++] = '\'';
rc[i] = '\0';
return rc;
}
fail:
return NULL;
}
/**
* Create a textual representation of the a duration.
*
* @param buffer Output buffer, with a size of at least
* 10 `char`:s plus enough to encode a `time_t`.
* @param s The duration in seconds.
*/
static void
strduration(char *buffer, time_t s)
{
char *buf = buffer;
int seconds, minutes, hours;
seconds = s % 60, s /= 60;
minutes = s % 60, s /= 60;
hours = s % 24, s /= 24;
if (s) {
buf += sprintf(buf, "%llid", (long long int)s);
buf += sprintf(buf, "%02i:", hours);
buf += sprintf(buf, "%02i", minutes);
} else if (hours) {
buf += sprintf(buf, "%i:", hours);
buf += sprintf(buf, "%02i", minutes);
} else if (minutes) {
buf += sprintf(buf, "%i", minutes);
}
sprintf(buf, "%02i", seconds);
}
/**
* Dump a job to the socket.
*
* @param job The job.
* @return 0 on success, -1 on error.
*/
static int
send_job_human(struct job *job)
{
struct tm *tm;
struct timespec rem;
const char *clk;
char rem_s[3 * sizeof(time_t) + sizeof("d00:00:00")];
char *qstr = NULL;
char line[sizeof("job: %zu clock: unrecognised argc: %i remaining: , argv[0]: ")
+ 3 * sizeof(size_t) + 3 * sizeof(int) + sizeof(rem_s) + 9];
char timestr_a[sizeof("0000-00-00 00:00:00") + 3 * sizeof(time_t)];
char timestr_b[10];
char **args = NULL;
char **arg;
char **argv = NULL;
char **envp = NULL;
size_t argsn;
int rc = 0;
int saved_errno;
/* Get remaining time. */
if (clock_gettime(job->clk, &rem))
return errno == EINVAL ? 0 : -1;
rem.tv_sec -= job->ts.tv_sec;
rem.tv_nsec -= job->ts.tv_nsec;
if (rem.tv_nsec < 0) {
rem.tv_sec -= 1;
rem.tv_nsec += 1000000000L;
}
if (rem.tv_sec < 0)
/* This job will be removed momentarily, do not list it. (To simply things.) */
return 0;
/* Get clock name. */
switch (job->clk) {
case CLOCK_REALTIME: clk = "walltime"; break;
case CLOCK_BOOTTIME: clk = "boottime"; break;
default: clk = "unrecognised"; break;
}
/* Get textual representation of the remaining time. (Seconds only.) */
strduration(rem_s, rem.tv_sec);
/* Get textual representation of the expiration time. */
switch (job->clk) {
case CLOCK_REALTIME:
t (!(tm = localtime(&(job->ts.tv_sec))));
strftime(timestr_a, sizeof(timestr_a), "%Y-%m-%d %H:%M:%S", tm);
break;
default:
strduration(timestr_a, job->ts.tv_sec);
break;
}
sprintf(timestr_b, "%09li", job->ts.tv_nsec);
/* Get arguments. */
t (!(args = restore_array(job->payload, job->n, &argsn)));
t (!(argv = sublist(args, (size_t)(job->argc))));
t (!(envp = sublist(args + job->argc, argsn - (size_t)(job->argc))));
/* Send message. */
t (!(qstr = quote(args[0])));
sprintf(line, "job: %zu clock: %s argc: %i remaining: %s.%09li, argv[0]: ",
job->no, clk, job->argc, rem_s, rem.tv_nsec);
t (send_string(SOCK_FILENO, STDOUT_FILENO,
line, qstr, "\n",
" time: ", timestr_a, ".", timestr_b, "\n",
" argv:",
NULL));
for (arg = argv; *arg; arg++) {
free(qstr);
t (!(qstr = quote(*arg)));
t (send_string(SOCK_FILENO, STDOUT_FILENO, " ", qstr, NULL));
}
free(qstr), qstr = NULL;
t (send_string(SOCK_FILENO, STDOUT_FILENO, "\n envp:", NULL));
for (arg = envp; *arg; arg++) {
t (!(qstr = quote(*arg)));
t (send_string(SOCK_FILENO, STDOUT_FILENO, " ", qstr, NULL));
free(qstr);
}
qstr = NULL;
t (send_string(SOCK_FILENO, STDOUT_FILENO, "\n\n", NULL));
done:
saved_errno = errno;
free(qstr);
free(args);
free(argv);
free(envp);
errno = saved_errno;
return rc;
fail:
rc = -1;
goto done;
}
/**
* Subroutine to the sat daemon: list jobs.
*
* @param argc Should be 3.
* @param argv The name of the process, the pathname of the socket,
* and the pathname to the state file.
* @return 0 The process was successful.
* @return 1 The process failed queuing the job.
*/
int
main(int argc, char *argv[])
{
size_t n = 0;
char *message = NULL;
struct job **jobs;
struct job **job;
DAEMON_PROLOGUE;
/* Receive and validate message. */
t (readall(SOCK_FILENO, &message, &n) || n);
shutdown(SOCK_FILENO, SHUT_RD);
/* Perform action. */
t (!(jobs = get_jobs()));
for (job = jobs; *job; job++)
t (send_job_human(*job));
DAEMON_CLEANUP_START;
for (job = jobs; *job; job++)
free(*job);
free(jobs);
free(message);
DAEMON_CLEANUP_END;
}
