diff options
Diffstat (limited to 'bin')
| -rw-r--r-- | bin/.gitignore | 11 | ||||
| -rw-r--r-- | bin/LICENSE | 661 | ||||
| -rw-r--r-- | bin/Makefile | 36 | ||||
| -rw-r--r-- | bin/bri.c | 84 | ||||
| -rw-r--r-- | bin/dtch.c | 262 | ||||
| -rw-r--r-- | bin/hnel.c | 127 | ||||
| -rw-r--r-- | bin/jrp.c | 285 | ||||
| -rw-r--r-- | bin/pbd.c | 143 | ||||
| -rw-r--r-- | bin/wake.c | 55 | ||||
| -rw-r--r-- | bin/watch.c | 95 | ||||
| -rw-r--r-- | bin/xx.c | 129 |
11 files changed, 1888 insertions, 0 deletions
diff --git a/bin/.gitignore b/bin/.gitignore new file mode 100644 index 00000000..8d86f5a3 --- /dev/null +++ b/bin/.gitignore @@ -0,0 +1,11 @@ +atch +bri +dtch +hnel +jrp +pbcopy +pbd +pbpaste +wake +watch +xx diff --git a/bin/LICENSE b/bin/LICENSE new file mode 100644 index 00000000..dba13ed2 --- /dev/null +++ b/bin/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Affero General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +<http://www.gnu.org/licenses/>. diff --git a/bin/Makefile b/bin/Makefile new file mode 100644 index 00000000..62a50309 --- /dev/null +++ b/bin/Makefile @@ -0,0 +1,36 @@ +BINS = atch bri dtch hnel jrp pbcopy pbd pbpaste wake watch xx +CWARNS = -Wall -Wextra -Wpedantic + +all: $(BINS) + +%: %.c + $(CC) $(CWARNS) $(CFLAGS) -o $@ $< + +atch: dtch + ln -f dtch atch + +dtch: dtch.c + $(CC) $(CWARNS) $(CFLAGS) -lutil -o dtch dtch.c + +hnel: hnel.c + $(CC) $(CWARNS) $(CFLAGS) -lutil -o hnel hnel.c + +jrp: jrp.c + $(CC) $(CWARNS) $(CFLAGS) -ledit -o jrp jrp.c + +pbcopy: pbd + ln -f pbd pbcopy + +pbpaste: pbd + ln -f pbd pbpaste + +clean: + rm -f $(BINS) + +link: $(BINS) + ln -s -f $(BINS:%=$(PWD)/%) ~/.bin + +unlink: + rm -f $(BINS:%=~/.bin/%) + +.PHONY: all clean link unlink diff --git a/bin/bri.c b/bin/bri.c new file mode 100644 index 00000000..5760c0cd --- /dev/null +++ b/bin/bri.c @@ -0,0 +1,84 @@ +/* Backlight brightness control. + * + * Copyright (c) 2017, June McEnroe <programble@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <dirent.h> +#include <err.h> +#include <errno.h> +#include <stdio.h> +#include <string.h> +#include <sysexits.h> +#include <unistd.h> + +static const char *CLASS = "/sys/class/backlight"; + +int main(int argc, char *argv[]) { + int error; + + if (argc < 2) errx(EX_USAGE, "usage: bri N | +... | -..."); + + error = chdir(CLASS); + if (error) err(EX_IOERR, "%s", CLASS); + + DIR *dir = opendir("."); + if (!dir) err(EX_IOERR, "%s", CLASS); + + struct dirent *entry; + while (NULL != (errno = 0, entry = readdir(dir))) { + if (entry->d_name[0] == '.') continue; + + error = chdir(entry->d_name); + if (error) err(EX_IOERR, "%s", entry->d_name); + break; + } + if (!entry) { + if (errno) err(EX_IOERR, "%s", CLASS); + errx(EX_CONFIG, "empty %s", CLASS); + } + + char *value = argv[1]; + + if (value[0] == '+' || value[0] == '-') { + FILE *actual = fopen("actual_brightness", "r"); + if (!actual) err(EX_IOERR, "actual_brightness"); + + unsigned int brightness; + int match = fscanf(actual, "%u", &brightness); + if (match == EOF) err(EX_IOERR, "actual_brightness"); + if (match < 1) err(EX_DATAERR, "actual_brightness"); + + size_t count = strnlen(value, 15); + if (value[0] == '+') { + brightness += 16 * count; + } else { + brightness -= 16 * count; + } + + char buf[15]; + snprintf(buf, sizeof(buf), "%u", brightness); + + value = buf; + } + + FILE *brightness = fopen("brightness", "w"); + if (!brightness) err(EX_IOERR, "brightness"); + + int count = fprintf(brightness, "%s", value); + if (count < 0) err(EX_IOERR, "brightness"); + + return EX_OK; +} diff --git a/bin/dtch.c b/bin/dtch.c new file mode 100644 index 00000000..74719fba --- /dev/null +++ b/bin/dtch.c @@ -0,0 +1,262 @@ +/* Session attach and detach. + * + * Copyright (c) 2017, June McEnroe <programble@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <poll.h> +#include <pwd.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/ioctl.h> +#include <sys/socket.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <sys/un.h> +#include <sys/wait.h> +#include <sysexits.h> +#include <termios.h> +#include <unistd.h> + +#if defined __FreeBSD__ +#include <libutil.h> +#elif defined __linux__ +#include <pty.h> +#else +#include <util.h> +#endif + +static struct passwd *getUser(void) { + uid_t uid = getuid(); + struct passwd *user = getpwuid(uid); + if (!user) err(EX_OSFILE, "/etc/passwd"); + return user; +} + +static struct sockaddr_un sockAddr(const char *home, const char *name) { + struct sockaddr_un addr = { .sun_family = AF_LOCAL }; + snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/.dtch/%s", home, name); + return addr; +} + +static ssize_t writeAll(int fd, const char *buf, size_t len) { + ssize_t writeLen; + while (0 < (writeLen = write(fd, buf, len))) { + buf += writeLen; + len -= writeLen; + } + return writeLen; +} + +char z; +struct iovec iov = { .iov_base = &z, .iov_len = 1 }; + +static ssize_t sendFd(int sock, int fd) { + size_t len = CMSG_LEN(sizeof(int)); + char buf[len]; + struct msghdr msg = { + .msg_iov = &iov, + .msg_iovlen = 1, + .msg_control = buf, + .msg_controllen = len, + }; + + struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg); + cmsg->cmsg_len = len; + cmsg->cmsg_level = SOL_SOCKET; + cmsg->cmsg_type = SCM_RIGHTS; + *(int *)CMSG_DATA(cmsg) = fd; + + return sendmsg(sock, &msg, 0); +} + +static int recvFd(int sock) { + size_t len = CMSG_LEN(sizeof(int)); + char buf[len]; + struct msghdr msg = { + .msg_iov = &iov, + .msg_iovlen = 1, + .msg_control = buf, + .msg_controllen = len, + }; + + ssize_t n = recvmsg(sock, &msg, 0); + if (n < 0) return -1; + + struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg); + if (!cmsg) { errno = ENOMSG; return -1; } + if (cmsg->cmsg_type != SCM_RIGHTS) { errno = EBADMSG; return -1; } + + return *(int *)CMSG_DATA(cmsg); +} + +static struct sockaddr_un addr; + +static void unlinkAddr(void) { + unlink(addr.sun_path); +} + +static int dtch(int argc, char *argv[]) { + int error; + + struct passwd *user = getUser(); + + char *name = user->pw_name; + char *cmd = user->pw_shell; + if (argc > 2) { + name = argv[1]; + cmd = argv[2]; + argv += 2; + } else if (argc > 1) { + name = argv[1]; + argv++; + } + + int home = open(user->pw_dir, 0); + if (home < 0) err(EX_IOERR, "%s", user->pw_dir); + error = mkdirat(home, ".dtch", S_IRWXU); + if (error && errno != EEXIST) err(EX_IOERR, "%s/.dtch", user->pw_dir); + error = close(home); + if (error) err(EX_IOERR, "%s", user->pw_dir); + + int server = socket(PF_LOCAL, SOCK_STREAM, 0); + if (server < 0) err(EX_OSERR, "socket"); + + addr = sockAddr(user->pw_dir, name); + error = bind(server, (struct sockaddr *)&addr, sizeof(addr)); + if (error) err(EX_IOERR, "%s", addr.sun_path); + atexit(unlinkAddr); + + error = chmod(addr.sun_path, 0600); + if (error) err(EX_IOERR, "%s", addr.sun_path); + + int master; + pid_t pid = forkpty(&master, NULL, NULL, NULL); + if (pid < 0) err(EX_OSERR, "forkpty"); + + if (!pid) { + error = close(server); + if (error) warn("close(%d)", server); + execvp(cmd, argv); + err(EX_OSERR, "%s", cmd); + } + + error = listen(server, 0); + if (error) err(EX_OSERR, "listen"); + + for (;;) { + int client = accept(server, NULL, NULL); + if (client < 0) err(EX_IOERR, "accept(%d)", server); + + ssize_t len = sendFd(client, master); + if (len < 0) warn("sendmsg(%d)", client); + + len = recv(client, &z, sizeof(z), 0); + if (len < 0) warn("recv(%d)", client); + + error = close(client); + if (error) warn("close(%d)", client); + + pid_t dead = waitpid(pid, NULL, WNOHANG); + if (dead < 0) warn("waitpid(%d)", pid); + if (dead) exit(EX_OK); + } +} + +static struct termios saveTerm; + +static void restoreTerm(void) { + tcsetattr(STDERR_FILENO, TCSADRAIN, &saveTerm); + printf( + "\x1b[?1049l" // rmcup + "\x1b\x63\x1b[!p\x1b[?3;4l\x1b[4l\x1b>" // reset + ); +} + +static int atch(int argc, char *argv[]) { + int error; + + struct passwd *user = getUser(); + char *name = (argc > 1) ? argv[1] : user->pw_name; + + int client = socket(PF_LOCAL, SOCK_STREAM, 0); + if (client < 0) err(EX_OSERR, "socket"); + + struct sockaddr_un addr = sockAddr(user->pw_dir, name); + error = connect(client, (struct sockaddr *)&addr, sizeof(addr)); + if (error) err(EX_IOERR, "%s", addr.sun_path); + + int master = recvFd(client); + if (master < 0) err(EX_IOERR, "recvmsg(%d)", client); + + struct winsize window; + error = ioctl(STDERR_FILENO, TIOCGWINSZ, &window); + if (error) err(EX_IOERR, "ioctl(%d, TIOCGWINSZ)", STDERR_FILENO); + + error = ioctl(master, TIOCSWINSZ, &window); + if (error) err(EX_IOERR, "ioctl(%d, TIOCSWINSZ)", master); + + error = tcgetattr(STDERR_FILENO, &saveTerm); + if (error) err(EX_IOERR, "tcgetattr(%d)", STDERR_FILENO); + atexit(restoreTerm); + + struct termios raw; + cfmakeraw(&raw); + error = tcsetattr(STDERR_FILENO, TCSADRAIN, &raw); + if (error) err(EX_IOERR, "tcsetattr(%d)", STDERR_FILENO); + + char ctrlL = CTRL('L'); + ssize_t len = write(master, &ctrlL, 1); + if (len < 0) err(EX_IOERR, "write(%d)", master); + + struct pollfd fds[2] = { + { .fd = STDIN_FILENO, .events = POLLIN }, + { .fd = master, .events = POLLIN }, + }; + + while (0 < poll(fds, 2, -1)) { + char buf[4096]; + ssize_t len; + + if (fds[0].revents) { + len = read(STDIN_FILENO, buf, sizeof(buf)); + if (len < 0) err(EX_IOERR, "read(%d)", STDIN_FILENO); + + if (len && buf[0] == CTRL('Q')) exit(EX_OK); + + len = writeAll(master, buf, len); + if (len < 0) err(EX_IOERR, "write(%d)", master); + } + + if (fds[1].revents) { + len = read(master, buf, sizeof(buf)); + if (len < 0) err(EX_IOERR, "read(%d)", master); + len = writeAll(STDOUT_FILENO, buf, len); + if (len < 0) err(EX_IOERR, "write(%d)", STDOUT_FILENO); + } + } + err(EX_IOERR, "poll([%d,%d])", STDIN_FILENO, master); +} + +int main(int argc, char *argv[]) { + switch (argv[0][0]) { + case 'd': return dtch(argc, argv); + case 'a': return atch(argc, argv); + } + return EX_USAGE; +} diff --git a/bin/hnel.c b/bin/hnel.c new file mode 100644 index 00000000..03b8c7a8 --- /dev/null +++ b/bin/hnel.c @@ -0,0 +1,127 @@ +/* PTY wrapper for preserving HJKL in Tarmak layouts. + * + * Copyright (c) 2017, June McEnroe <programble@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <err.h> +#include <poll.h> +#include <stdbool.h> +#include <stdlib.h> +#include <sys/ioctl.h> +#include <sys/wait.h> +#include <sysexits.h> +#include <termios.h> +#include <unistd.h> + +#if defined __FreeBSD__ +#include <libutil.h> +#elif defined __linux__ +#include <pty.h> +#else +#include <util.h> +#endif + +static char table[256] = { + ['n'] = 'j', ['N'] = 'J', [CTRL('N')] = CTRL('J'), + ['e'] = 'k', ['E'] = 'K', [CTRL('E')] = CTRL('K'), + ['j'] = 'e', ['J'] = 'E', [CTRL('J')] = CTRL('E'), + ['k'] = 'n', ['K'] = 'N', [CTRL('K')] = CTRL('N'), +}; + +static ssize_t writeAll(int fd, const char *buf, size_t len) { + ssize_t writeLen; + while (0 < (writeLen = write(fd, buf, len))) { + buf += writeLen; + len -= writeLen; + } + return writeLen; +} + +static struct termios saveTerm; + +static void restoreTerm(void) { + tcsetattr(STDERR_FILENO, TCSADRAIN, &saveTerm); +} + +int main(int argc, char *argv[]) { + int error; + + if (argc < 2) return EX_USAGE; + + error = tcgetattr(STDERR_FILENO, &saveTerm); + if (error) err(EX_IOERR, "tcgetattr"); + atexit(restoreTerm); + + struct termios raw; + cfmakeraw(&raw); + error = tcsetattr(STDERR_FILENO, TCSADRAIN, &raw); + if (error) err(EX_IOERR, "tcsetattr"); + + struct winsize window; + error = ioctl(STDERR_FILENO, TIOCGWINSZ, &window); + if (error) err(EX_IOERR, "ioctl(%d, TIOCGWINSZ)", STDERR_FILENO); + + int master; + pid_t pid = forkpty(&master, NULL, NULL, &window); + if (pid < 0) err(EX_OSERR, "forkpty"); + + if (!pid) { + execvp(argv[1], argv + 1); + err(EX_OSERR, "%s", argv[1]); + } + + bool enable = true; + + struct pollfd fds[2] = { + { .fd = STDIN_FILENO, .events = POLLIN }, + { .fd = master, .events = POLLIN }, + }; + while (0 < poll(fds, 2, -1)) { + char buf[4096]; + ssize_t len; + + if (fds[0].revents) { + len = read(STDIN_FILENO, buf, sizeof(buf)); + if (len < 0) err(EX_IOERR, "read(%d)", STDIN_FILENO); + + if (len == 1) { + if (buf[0] == CTRL('S')) { + enable = !enable; + continue; + } + + unsigned char c = buf[0]; + if (enable && table[c]) buf[0] = table[c]; + } + + len = writeAll(master, buf, len); + if (len < 0) err(EX_IOERR, "write(%d)", master); + } + + if (fds[1].revents) { + len = read(master, buf, sizeof(buf)); + if (len < 0) err(EX_IOERR, "read(%d)", master); + len = writeAll(STDOUT_FILENO, buf, len); + if (len < 0) err(EX_IOERR, "write(%d)", STDOUT_FILENO); + } + + int status; + pid_t dead = waitpid(pid, &status, WNOHANG); + if (dead < 0) err(EX_OSERR, "waitpid(%d)", pid); + if (dead) return WIFEXITED(status) ? WEXITSTATUS(status) : EX_SOFTWARE; + } + err(EX_IOERR, "poll"); +} diff --git a/bin/jrp.c b/bin/jrp.c new file mode 100644 index 00000000..9fa3dcc1 --- /dev/null +++ b/bin/jrp.c @@ -0,0 +1,285 @@ +/* JIT RPN calculator. + * + * Copyright (c) 2017, June McEnroe <programble@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <err.h> +#include <histedit.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/mman.h> +#include <sysexits.h> +#include <unistd.h> + +typedef unsigned long qop; +typedef unsigned int dop; + +typedef long qvalue; +typedef int dvalue; +typedef unsigned long uvalue; + +typedef qvalue *(*jitFn)(qvalue *); +typedef void (*rtFn)(qvalue); + +static char *formatBin(qvalue val) { + static char buf[sizeof(qvalue) * 8 + 1]; + uvalue uval = val; + size_t i = sizeof(buf); + do { + buf[--i] = '0' + (uval & 1); + } while (uval >>= 1); + return &buf[i]; +} + +static void rtPrintAscii(qvalue val) { + printf("%c\n", (char)val); +} +static void rtPrintBin(qvalue val) { + printf("%s\n", formatBin(val)); +} +static void rtPrintOct(qvalue val) { + printf("%lo\n", val); +} +static void rtPrintDec(qvalue val) { + printf("%ld\n", val); +} +static void rtPrintHex(qvalue val) { + printf("%lx\n", val); +} + +static const dop DOP_NOP = 0x90666666; // nop +static const dop DOP_PUSH = 0xc7c74857; // push rdi; mov rdi, strict dword 0 +static const dop DOP_DROP = 0x9066665f; // pop rdi +static const dop DOP_DUP = 0x90666657; // push rdi +static const dop DOP_SWAP = 0x243c8748; // xchg rdi, [rsp] +static const dop DOP_NEG = 0x90dff748; // neg rdi +static const dop DOP_ADD = 0xc7014858; // pop rax; add rdi, rax +static const dop DOP_QUO = 0x90c78948; // mov rdi, rax +static const dop DOP_REM = 0x90d78948; // mov rdi, rdx +static const dop DOP_NOT = 0x90d7f748; // not rdi +static const dop DOP_AND = 0xc7214858; // pop rax; and rdi, rax +static const dop DOP_OR = 0xc7094858; // pop rax; or rdi, rax +static const dop DOP_XOR = 0xc7314858; // pop rax; xor rdi, rax + +static const qop QOP_PROL = 0x5ffc8948e5894855; // push rbp; mov rbp, rsp; mov rsp, rdi; pop rdi +static const qop QOP_EPIL = 0x5dec8948e0894857; // push rdi; mov rax, rsp; mov rsp, rbp; pop rbp +static const qop QOP_RET = 0x90666666906666c3; // ret +static const qop QOP_CRT = 0xb848906690e58748; // xchg rsp, rbp; mov rax, strict qword 0 +static const qop QOP_CALL = 0x90665fe58748d0ff; // call rax; xchg rsp, rbp; pop rdi +static const qop QOP_PUSH = 0xbf48906690666657; // push rdi; mov rdi, strict qword 0 +static const qop QOP_SUB = 0x9066665f243c2948; // sub [rsp], rdi; pop rdi +static const qop QOP_MUL = 0x906666f8af0f4858; // pop rax; imul rdi, rax +static const qop QOP_DIV = 0x9066fff748994858; // pop rax; cqo; idiv rdi +static const qop QOP_SHL = 0x5f2424d348f98948; // mov rcx, rdi; shl qword [rsp], cl; pop rdi +static const qop QOP_SHR = 0x5f242cd348f98948; // mov rcx, rdi; shr qword [rsp], cl; pop rdi + +static int radix = 10; + +static struct { + qop *base; + qop *ptr; + dop dop; +} code; + +static struct { + qvalue *base; + qvalue *limit; + qvalue *ptr; +} stack; + +static void jitDop(dop op) { + if (code.dop) { + *code.ptr++ = (qop)op << 32 | code.dop; + code.dop = 0; + } else { + code.dop = op; + } +} + +static void jitQop(qop op) { + if (code.dop) jitDop(DOP_NOP); + *code.ptr++ = op; +} + +static void jitPush(qvalue imm) { + if ((dvalue)imm == imm) { + jitQop(DOP_PUSH | (qop)imm << 32); + } else { + jitQop(QOP_PUSH); + jitQop((qop)imm); + } +} + +static void jitCall(rtFn fn) { + jitQop(QOP_CRT); + jitQop((qop)fn); + jitQop(QOP_CALL); +} + +static void jitBegin(void) { + code.ptr = code.base; + jitQop(QOP_PROL); +} + +static void jitEnd(void) { + jitQop(QOP_EPIL); + jitQop(QOP_RET); +} + +static void jitInit(void) { + code.base = mmap(0, getpagesize(), PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); + if (code.base == MAP_FAILED) err(EX_OSERR, "mmap"); +} + +static void stackInit(void) { + stack.base = mmap(0, 2 * getpagesize(), PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); + if (stack.base == MAP_FAILED) err(EX_OSERR, "mmap"); + stack.limit = stack.base + getpagesize() / sizeof(qvalue); + stack.ptr = stack.limit; +} + +static void jitExec(void) { + int error; + error = mprotect(code.base, getpagesize(), PROT_READ | PROT_EXEC); + if (error) err(EX_OSERR, "mprotect"); + stack.ptr = ((jitFn)code.base)(stack.ptr); + if (stack.ptr > stack.limit) stack.ptr = stack.limit; + error = mprotect(code.base, getpagesize(), PROT_READ | PROT_WRITE); + if (error) err(EX_OSERR, "mprotect"); +} + +static void jitSrc(const char *src) { + bool quote = false; + while (*src) { + if (quote) { + jitPush(*src++); + quote = false; + continue; + } + + switch (*src) { + case ' ': break; + case 39: quote = true; break; + case 'B': radix = 2; break; + case 'O': radix = 8; break; + case 'D': radix = 10; break; + case 'X': radix = 16; break; + case ';': jitDop(DOP_DROP); break; + case ':': jitDop(DOP_DUP); break; + case 92: jitDop(DOP_SWAP); break; + case '_': jitDop(DOP_NEG); break; + case '+': jitDop(DOP_ADD); break; + case '-': jitQop(QOP_SUB); break; + case '*': jitQop(QOP_MUL); break; + case '/': jitQop(QOP_DIV); jitDop(DOP_QUO); break; + case '%': jitQop(QOP_DIV); jitDop(DOP_REM); break; + case '~': jitDop(DOP_NOT); break; + case '&': jitDop(DOP_AND); break; + case '|': jitDop(DOP_OR); break; + case '^': jitDop(DOP_XOR); break; + case '<': jitQop(QOP_SHL); break; + case '>': jitQop(QOP_SHR); break; + case ',': jitCall(rtPrintAscii); break; + case '.': switch (radix) { + case 2: jitCall(rtPrintBin); break; + case 8: jitCall(rtPrintOct); break; + case 10: jitCall(rtPrintDec); break; + case 16: jitCall(rtPrintHex); break; + } break; + + default: { + char *rest; + qvalue val = strtol(src, &rest, radix); + if (rest != src) { + src = rest; + jitPush(val); + continue; + } + } + } + + src++; + } +} + +static void jitDump(const char *path, FILE *file) { + size_t nitems = code.ptr - code.base; + size_t written = fwrite(code.base, sizeof(qop), nitems, file); + if (written < nitems) err(EX_IOERR, "%s", path); +} + +static char *prompt(EditLine *el __attribute((unused))) { + static char buf[4096]; + char *bufPtr = buf; + for (qvalue *stackPtr = stack.limit - 1; stackPtr >= stack.ptr; --stackPtr) { + size_t bufLen = sizeof(buf) - (bufPtr - buf) - 2; + switch (radix) { + case 2: bufPtr += snprintf(bufPtr, bufLen, " %s", formatBin(*stackPtr)); break; + case 8: bufPtr += snprintf(bufPtr, bufLen, " %lo", *stackPtr); break; + case 10: bufPtr += snprintf(bufPtr, bufLen, " %ld", *stackPtr); break; + case 16: bufPtr += snprintf(bufPtr, bufLen, " %lx", *stackPtr); break; + } + } + buf[0] = '['; + if (bufPtr == buf) bufPtr++; + *bufPtr++ = ']'; + *bufPtr++ = ' '; + *bufPtr = 0; + return buf; +} + +int main(int argc, char *argv[]) { + FILE *file = NULL; + char *path = getenv("JRP_DUMP"); + if (path) { + file = fopen(path, "w"); + if (!file) err(EX_CANTCREAT, "%s", path); + } + + jitInit(); + stackInit(); + + if (argc > 1) { + jitBegin(); + for (int i = 1; i < argc; ++i) + jitSrc(argv[i]); + jitEnd(); + if (file) jitDump(path, file); + jitExec(); + return EX_OK; + } + + EditLine *el = el_init(argv[0], stdin, stdout, stderr); + el_set(el, EL_PROMPT, prompt); + el_set(el, EL_SIGNAL, true); + + for (;;) { + int count; + const char *line = el_gets(el, &count); + if (count < 0) err(EX_IOERR, "el_gets"); + if (!line) break; + + jitBegin(); + jitSrc(line); + jitEnd(); + if (file) jitDump(path, file); + jitExec(); + } + + el_end(el); + return EX_OK; +} diff --git a/bin/pbd.c b/bin/pbd.c new file mode 100644 index 00000000..fcc5d2cf --- /dev/null +++ b/bin/pbd.c @@ -0,0 +1,143 @@ +/* TCP server which pipes between macOS pbcopy and pbpaste, and pbcopy and + * pbpaste implementations which connect to it. + * + * Copyright (c) 2017, June McEnroe <programble@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <arpa/inet.h> +#include <err.h> +#include <netinet/in.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/socket.h> +#include <sys/wait.h> +#include <sysexits.h> +#include <unistd.h> + +static void spawn(const char *cmd, int childFd, int parentFd) { + pid_t pid = fork(); + if (pid < 0) err(EX_OSERR, "fork"); + + if (pid) { + int status; + pid_t wait = waitpid(pid, &status, 0); + if (wait < 0) err(EX_OSERR, "waitpid"); + + if (status) { + warnx("child %s status %d", cmd, status); + } + } else { + int fd = dup2(parentFd, childFd); + if (fd < 0) err(EX_OSERR, "dup2"); + + int error = execlp(cmd, cmd, NULL); + if (error) err(EX_OSERR, "execlp"); + } +} + +static int pbd(void) { + int error; + + int server = socket(PF_INET, SOCK_STREAM, 0); + if (server < 0) err(EX_OSERR, "socket"); + + struct sockaddr_in addr = { + .sin_family = AF_INET, + .sin_port = htons(7062), + .sin_addr = { .s_addr = htonl(0x7f000001) }, + }; + + error = bind(server, (struct sockaddr *)&addr, sizeof(addr)); + if (error) err(EX_OSERR, "bind"); + + error = listen(server, 1); + if (error) err(EX_OSERR, "listen"); + + for (;;) { + int client = accept(server, NULL, NULL); + if (client < 0) err(EX_OSERR, "accept"); + + spawn("pbpaste", STDOUT_FILENO, client); + + uint8_t p; + ssize_t peek = recv(client, &p, 1, MSG_PEEK); + if (peek < 0) err(EX_IOERR, "recv"); + + if (peek) { + spawn("pbcopy", STDIN_FILENO, client); + } + + error = close(client); + if (error) err(EX_IOERR, "close"); + } +} + +static int pbdClient(void) { + int client = socket(PF_INET, SOCK_STREAM, 0); + if (client < 0) err(EX_OSERR, "socket"); + + struct sockaddr_in addr = { + .sin_family = AF_INET, + .sin_port = htons(7062), + .sin_addr = { .s_addr = htonl(0x7f000001) }, + }; + + int error = connect(client, (struct sockaddr *)&addr, sizeof(addr)); + if (error) err(EX_OSERR, "connect"); + + return client; +} + +static void copy(int fdIn, int fdOut) { + char readBuf[4096]; + ssize_t readLen; + while (0 < (readLen = read(fdIn, readBuf, sizeof(readBuf)))) { + char *writeBuf = readBuf; + ssize_t writeLen; + while (0 < (writeLen = write(fdOut, writeBuf, readLen))) { + writeBuf += writeLen; + readLen -= writeLen; + } + if (writeLen < 0) err(EX_IOERR, "write"); + } + if (readLen < 0) err(EX_IOERR, "read"); +} + +static int pbcopy(void) { + int client = pbdClient(); + copy(STDIN_FILENO, client); + return EX_OK; +} + +static int pbpaste(void) { + int client = pbdClient(); + int error = shutdown(client, SHUT_WR); + if (error) err(EX_OSERR, "shutdown"); + copy(client, STDOUT_FILENO); + return EX_OK; +} + +int main(int argc __attribute((unused)), char *argv[]) { + if (!argv[0][0] || !argv[0][1]) return EX_USAGE; + switch (argv[0][2]) { + case 'd': return pbd(); + case 'c': return pbcopy(); + case 'p': return pbpaste(); + } + return EX_USAGE; +} diff --git a/bin/wake.c b/bin/wake.c new file mode 100644 index 00000000..07a2ef37 --- /dev/null +++ b/bin/wake.c @@ -0,0 +1,55 @@ +/* Wake-on-LAN. + * + * Copyright (c) 2017, June McEnroe <programble@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <err.h> +#include <netinet/in.h> +#include <stdint.h> +#include <stdlib.h> +#include <sys/socket.h> +#include <sysexits.h> + +#define MAC 0x04, 0x7D, 0x7B, 0xD5, 0x6A, 0x53 + +const uint8_t payload[] = { + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + MAC, MAC, MAC, MAC, MAC, MAC, MAC, MAC, + MAC, MAC, MAC, MAC, MAC, MAC, MAC, MAC, +}; + +int main() { + int sock = socket(PF_INET, SOCK_DGRAM, 0); + if (sock < 0) err(EX_OSERR, "socket"); + + int on = 1; + int error = setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)); + if (error) err(EX_OSERR, "setsockopt"); + + struct sockaddr_in addr = { + .sin_family = AF_INET, + .sin_port = 9, + .sin_addr.s_addr = INADDR_BROADCAST, + }; + + ssize_t len = sendto( + sock, payload, sizeof(payload), 0, + (struct sockaddr *)&addr, sizeof(addr) + ); + if (len < 0) err(EX_IOERR, "sendto"); + + return EX_OK; +} diff --git a/bin/watch.c b/bin/watch.c new file mode 100644 index 00000000..22bd5197 --- /dev/null +++ b/bin/watch.c @@ -0,0 +1,95 @@ +/* Execute a command each time files change. + * + * Copyright (c) 2017, June McEnroe <programble@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <sys/types.h> + +#include <err.h> +#include <fcntl.h> +#include <stdlib.h> +#include <sys/event.h> +#include <sys/wait.h> +#include <sysexits.h> +#include <unistd.h> + +static void watch(int kq, char *path) { + int fd = open(path, O_RDONLY); + if (fd < 0) err(EX_IOERR, "%s", path); + + struct kevent event = { + .ident = fd, + .filter = EVFILT_VNODE, + .flags = EV_ADD | EV_CLEAR, + .fflags = NOTE_WRITE | NOTE_DELETE, + .udata = path, + }; + int nevents = kevent(kq, &event, 1, NULL, 0, NULL); + if (nevents < 0) err(EX_IOERR, "kevent"); +} + +static void exec(char *const argv[]) { + pid_t pid = fork(); + if (pid < 0) err(EX_OSERR, "fork"); + + if (!pid) { + execvp(argv[0], argv); + err(EX_OSERR, "%s", argv[0]); + } + + int status; + pid = wait(&status); + if (pid < 0) err(EX_OSERR, "wait"); + + if (WIFEXITED(status)) { + warnx("exit %d", WEXITSTATUS(status)); + } else if (WIFSIGNALED(status)) { + warnx("signal %d", WTERMSIG(status)); + } else { + warnx("status %d", status); + } +} + +int main(int argc, char *argv[]) { + if (argc < 3) return EX_USAGE; + + int kq = kqueue(); + if (kq < 0) err(EX_OSERR, "kqueue"); + + int index; + for (index = 1; index < argc - 1; ++index) { + if (argv[index][0] == '-') { + index++; + break; + } + watch(kq, argv[index]); + } + + exec(&argv[index]); + + for (;;) { + struct kevent event; + int nevents = kevent(kq, NULL, 0, &event, 1, NULL); + if (nevents < 0) err(EX_IOERR, "kevent"); + + if (event.fflags & NOTE_DELETE) { + close(event.ident); + watch(kq, event.udata); + } + + exec(&argv[index]); + } +} diff --git a/bin/xx.c b/bin/xx.c new file mode 100644 index 00000000..e1e31e4a --- /dev/null +++ b/bin/xx.c @@ -0,0 +1,129 @@ +/* Hexdump. + * + * Copyright (c) 2017, June McEnroe <programble@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <ctype.h> +#include <err.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <sysexits.h> +#include <unistd.h> + +static bool allZero(const uint8_t *buf, size_t len) { + for (size_t i = 0; i < len; ++i) + if (buf[i]) return false; + return true; +} + +enum { + FLAG_ASCII = 1 << 0, + FLAG_OFFSET = 1 << 1, + FLAG_SKIP = 1 << 2, + FLAG_UNDUMP = 1 << 3, +}; + +static void dump(size_t cols, size_t group, uint8_t flags, FILE *file) { + uint8_t buf[cols]; + size_t offset = 0, len = 0; + for (;;) { + offset += len; + len = fread(buf, 1, sizeof(buf), file); + if (!len) break; + + if ((flags & FLAG_SKIP) && len == sizeof(buf)) { + static bool skip; + if (allZero(buf, len)) { + if (!skip) printf("*\n"); + skip = true; + continue; + } + skip = false; + } + + if (flags & FLAG_OFFSET) { + printf("%08zx: ", offset); + } + + for (size_t i = 0; i < len; ++i) { + if (group && i && !(i % group)) printf(" "); + printf("%02x ", buf[i]); + } + + if (flags & FLAG_ASCII) { + for (size_t i = len; i < cols; ++i) { + printf((group && !(i % group)) ? " " : " "); + } + printf(" "); + for (size_t i = 0; i < len; ++i) { + if (group && i && !(i % group)) printf(" "); + printf("%c", isprint(buf[i]) ? buf[i] : '.'); + } + } + + printf("\n"); + if (len < sizeof(buf)) break; + } +} + +static void undump(FILE *file) { + uint8_t byte; + int match; + while (1 == (match = fscanf(file, " %hhx", &byte))) { + printf("%c", byte); + } + if (match == 0) errx(EX_DATAERR, "invalid input"); +} + +int main(int argc, char *argv[]) { + size_t cols = 16; + size_t group = 8; + uint8_t flags = FLAG_ASCII | FLAG_OFFSET; + char *path = NULL; + + int opt; + while (0 < (opt = getopt(argc, argv, "ac:fg:hku"))) { + switch (opt) { + case 'a': flags ^= FLAG_ASCII; break; + case 'f': flags ^= FLAG_OFFSET; break; + case 'k': flags ^= FLAG_SKIP; break; + case 'u': flags ^= FLAG_UNDUMP; break; + case 'c': cols = strtoul(optarg, NULL, 10); break; + case 'g': group = strtoul(optarg, NULL, 10); break; + default: + fprintf(stderr, "usage: xx [-afku] [-c cols] [-g group] [file]\n"); + return (opt == 'h') ? EX_OK : EX_USAGE; + } + } + if (!cols) return EX_USAGE; + if (argc > optind) { + path = argv[optind]; + } + + FILE *file = path ? fopen(path, "r") : stdin; + if (!file) err(EX_NOINPUT, "%s", path); + + if (flags & FLAG_UNDUMP) { + undump(file); + } else { + dump(cols, group, flags, file); + } + + if (ferror(file)) err(EX_IOERR, "%s", path); + return EX_OK; +} |