Annotation of dgamelaunch-openbsd/nethackstub.c, Revision 1.1
1.1 ! rubenllo 1: /* nethackstub.c
! 2: * Copyright (c) 2004 Jilles Tjoelker <jilles@stack.nl>
! 3: *
! 4: * This program is free software; you can redistribute it and/or modify
! 5: * it under the terms of the GNU General Public License as published by
! 6: * the Free Software Foundation; either version 2 of the License, or
! 7: * (at your option) any later version.
! 8: *
! 9: * This program is distributed in the hope that it will be useful,
! 10: * but WITHOUT ANY WARRANTY; without even the implied warranty of
! 11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 12: * GNU General Public License for more details.
! 13: *
! 14: * You should have received a copy of the GNU General Public License
! 15: * along with this program; if not, write to the Free Software
! 16: * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
! 17: */
! 18:
! 19: /*
! 20: * This program can be used instead of nethack to test dgamelaunch.
! 21: */
! 22:
! 23: static const char rcsid[] = "$Id: nethackstub.c,v 1.4 2004/01/06 13:33:36 jilles Exp $";
! 24:
! 25: #include <sys/types.h>
! 26:
! 27: #include <ctype.h>
! 28: #include <errno.h>
! 29: #include <fcntl.h>
! 30: #include <signal.h>
! 31: #include <stdlib.h>
! 32: #include <string.h>
! 33: #include <unistd.h>
! 34:
! 35: void
! 36: sighup(int sig)
! 37: {
! 38: (void)sig;
! 39: #define S "SIGHUP received.\n"
! 40: write(STDOUT_FILENO, S, -1 + sizeof S);
! 41: #undef S
! 42: }
! 43:
! 44: void
! 45: sigterm(int sig)
! 46: {
! 47: (void)sig;
! 48: #define S "SIGTERM received.\n"
! 49: write(STDOUT_FILENO, S, -1 + sizeof S);
! 50: #undef S
! 51: exit(1);
! 52: }
! 53:
! 54: void
! 55: checkmail()
! 56: {
! 57: char *mailfile;
! 58: char buf[256];
! 59: int in, n;
! 60: struct flock fl;
! 61:
! 62: mailfile = getenv("MAIL");
! 63: if (getenv("SIMPLEMAIL"))
! 64: {
! 65: in = open(mailfile, O_RDWR);
! 66: if (in != -1)
! 67: {
! 68: fl.l_start = 0;
! 69: fl.l_len = 0;
! 70: fl.l_pid = getpid();
! 71: fl.l_type = F_WRLCK;
! 72: fl.l_whence = SEEK_SET;
! 73: if (fcntl(in, F_SETLK, &fl) != -1)
! 74: {
! 75: while ((n = read(in, buf, sizeof buf)) > 0)
! 76: {
! 77: write(STDOUT_FILENO, buf, n);
! 78: }
! 79: #define S "End of mail - press return to unlock mailfile\n"
! 80: write(STDOUT_FILENO, S, -1 + sizeof S);
! 81: #undef S
! 82: read(STDIN_FILENO, buf, sizeof buf);
! 83: ftruncate(in, (off_t)0);
! 84: /* File will be unlocked automatically when closed */
! 85: }
! 86: else
! 87: {
! 88: #define S "Cannot lock mailfile\n"
! 89: write(STDOUT_FILENO, S, -1 + sizeof S);
! 90: #undef S
! 91: }
! 92: close(in);
! 93: }
! 94: else
! 95: {
! 96: #define S "Cannot open mailfile\n"
! 97: write(STDOUT_FILENO, S, -1 + sizeof S);
! 98: #undef S
! 99: }
! 100: }
! 101: else
! 102: {
! 103: #define S "No SIMPLEMAIL\n"
! 104: write(STDOUT_FILENO, S, -1 + sizeof S);
! 105: #undef S
! 106: }
! 107: }
! 108:
! 109: int
! 110: main(int argc, char *argv[])
! 111: {
! 112: char buf[256];
! 113: int showusage = 1, n, i;
! 114: struct sigaction SA;
! 115:
! 116: /* Clear the screen for the benefit of dgamelaunch's check. */
! 117: #define S " \033[H\033[Jnethackstub started with arguments:\n"
! 118: write(STDOUT_FILENO, S, -1 + sizeof S);
! 119: #undef S
! 120: for (i = 1; i < argc; i++)
! 121: {
! 122: write(STDOUT_FILENO, argv[i], strlen(argv[i]));
! 123: #define S "\n"
! 124: write(STDOUT_FILENO, S, -1 + sizeof S);
! 125: #undef S
! 126: }
! 127:
! 128: sigemptyset(&SA.sa_mask);
! 129: SA.sa_flags = 0;
! 130: SA.sa_handler = sighup;
! 131: sigaction(SIGHUP, &SA, NULL);
! 132: SA.sa_handler = sigterm;
! 133: sigaction(SIGTERM, &SA, NULL);
! 134:
! 135: for (;;)
! 136: {
! 137: if (showusage)
! 138: {
! 139: #define S "i: close stdin - o: close stdout/stderr - m: check mail - q: quit\n"
! 140: write(STDOUT_FILENO, S, -1 + sizeof S);
! 141: #undef S
! 142: }
! 143: n = read(STDIN_FILENO, buf, sizeof buf);
! 144: if (n == -1 && errno == EINTR)
! 145: continue;
! 146: if (n <= 0)
! 147: break;
! 148: for (i = 0; i < n; i++)
! 149: {
! 150: switch (tolower(buf[i]))
! 151: {
! 152: case 'i':
! 153: close(STDIN_FILENO);
! 154: break;
! 155: case 'o':
! 156: close(STDOUT_FILENO);
! 157: close(STDERR_FILENO);
! 158: break;
! 159: case 'm':
! 160: checkmail();
! 161: break;
! 162: case 'q':
! 163: return 0;
! 164: break;
! 165: case '\r':
! 166: case '\n':
! 167: case ' ':
! 168: break;
! 169: default:
! 170: showusage = 1;
! 171: }
! 172: }
! 173: }
! 174:
! 175: for (;;)
! 176: pause();
! 177:
! 178: return 0;
! 179: }
! 180:
! 181: /* vim:ts=8:cin:sw=4
! 182: */
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