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/*
* Copyright (c) 2024 Eric Radman <ericshane@eradman.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <err.h>
#include <fcntl.h>
#include <libgen.h>
#include <limits.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include "missing/compat.h"
#include "status.h"
/* globals */
int status_stdin_pipe[2];
void
start_log_filter(int safe) {
char *argv[8];
char *awk_script;
struct passwd *pw;
awk_script = getenv("ENTR_STATUS_SCRIPT");
if ((!awk_script) || (strlen(awk_script) == 0)) {
pw = getpwuid(getuid());
asprintf(&awk_script, "%s/.entr/status.awk", pw->pw_dir);
}
create_dir(xdirname(awk_script));
install_file(awk_script,
"# http://eradman.com/entrproject/status-filters.html\n"
"/^signal/ { print $3, \"terminated by signal\", $2; }\n"
"/^exit/ { print $3, \"returned exit code\", $2; }\n");
argv[0] = "/usr/bin/awk";
argv[1] = "-F";
argv[2] = "|";
argv[3] = "-f";
argv[4] = awk_script;
#if defined(_LINUX_PORT)
argv[5] = "-S";
#else
argv[5] = "-safe";
#endif
argv[6] = NULL;
if (safe == 2)
argv[5] = NULL;
pipe(status_stdin_pipe);
status_pid = fork();
if (status_pid == -1)
err(1, "fork");
if (status_pid == 0) {
close(status_stdin_pipe[1]);
dup2(status_stdin_pipe[0], STDIN_FILENO);
execvp("awk", argv);
err(1, "could not exec %s", argv[0]);
}
close(status_stdin_pipe[0]);
}
void
write_log_filter(char *input, size_t len) {
if (write(status_stdin_pipe[1], input, len) == -1)
err(1, "write to child");
}
void
end_log_filter() {
close(status_stdin_pipe[1]);
kill(status_pid, SIGKILL);
}
/*
* xdirname - mimic dirname(3) on OpenBSD which does not modify input
* create_dir - ensure a directory exists
* install_file - create file is it does not exist
*/
char *
xdirname(const char *path) {
static char dname[PATH_MAX];
strlcpy(dname, path, sizeof(dname));
return dirname(dname);
}
void
create_dir(const char *dir) {
struct stat dst_sb;
if (stat(dir, &dst_sb) == -1)
mkdir(dir, 0750);
}
void
install_file(const char *dst, const char *content) {
int fd;
struct stat dst_sb;
if (stat(dst, &dst_sb) == -1) {
printf("entr: created '%s'\n", dst);
fd = open(dst, O_WRONLY | O_CREAT, 0640);
if (fd == -1)
err(1, "open");
if (write(fd, content, strlen(content)) == -1)
err(1, "write");
close(fd);
}
}
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