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-rw-r--r--src/cmdline.c429
1 files changed, 0 insertions, 429 deletions
diff --git a/src/cmdline.c b/src/cmdline.c
deleted file mode 100644
index 25939cb..0000000
--- a/src/cmdline.c
+++ /dev/null
@@ -1,429 +0,0 @@
-/**
- * MIT/X Consortium License
- *
- * 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 "bus.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <grp.h>
-#include <pwd.h>
-
-
-
-/**
- * Statement wrapper that goes to `fail` on failure
- */
-#define t(inst) if ((inst) == -1) goto fail
-
-
-
-/**
- * The name of the process
- */
-char *argv0;
-
-/**
- * The command to spawn when a message is received
- */
-static const char *command;
-
-
-
-/**
- * Spawn a command because a message has been received
- *
- * @param message The received message
- * @param user_data Not used
- * @return 1 (continue listening) on success, -1 on error
- */
-static int
-spawn_continue(const char *message, void *user_data)
-{
- pid_t pid;
- if (!message)
- return 1;
- if ((pid = fork()))
- return pid == -1 ? -1 : 1;
- setenv("msg", message, 1);
- execlp("sh", "sh", "-c", command, NULL);
- perror(argv0);
- exit(1);
- (void) user_data;
-}
-
-
-/**
- * Spawn a command because a message has been received
- *
- * @param message The received message
- * @param user_data Not used
- * @return 0 (stop listening) on success, -1 on error, or 1 if `message` is `NULL`
- */
-static int
-spawn_break(const char *message, void *user_data)
-{
- pid_t pid;
- if (!message)
- return 1;
- if ((pid = fork()))
- return pid == -1 ? -1 : 0;
- setenv("msg", message, 1);
- execlp("sh", "sh", "-c", command, NULL);
- perror(argv0);
- exit(1);
- (void) user_data;
-}
-
-
-/**
- * Parse a permission string
- *
- * @param str The permission string
- * @param andnot Output paramter for the mask of bits to remove (before applying `*or`)
- * @param or Output paramter for the mask of bits to apply
- * @return 0 on success, -1 on error
- */
-static int
-parse_mode(const char *str, mode_t *andnot, mode_t *or)
-{
-#define U S_IRWXU
-#define G S_IRWXG
-#define O S_IRWXO
- const char *s = str;
- int numerical = 1;
- mode_t mode = 0;
- char op = '=';
- mode_t bits;
-
- *andnot = 0;
- *or = 0;
-
- if (!*s)
- return errno = 0, -1;
-
- for (s = str; *s; s++) {
- if (('0' > *s) || (*s > '7')) {
- numerical = 0;
- break;
- } else {
- mode = (mode << 3) | (*s & 15);
- }
- }
-
- if (numerical) {
- *andnot = U | G | O;
- *or = mode;
- *or &= U | G | O;
- *or = (*or & U) ? (*or | U) : (*or & (mode_t)~U);
- *or = (*or & G) ? (*or | G) : (*or & (mode_t)~G);
- *or = (*or & O) ? (*or | O) : (*or & (mode_t)~O);
- return 0;
- }
-
- for (s = str; *s; s++) {
- if (strchr("+-=", *s)) {
- op = *s;
- } else if (strchr("ugo", *s)) {
- if (*s == 'u')
- bits = U;
- else if (*s == 'g')
- bits = G;
- else
- bits = O;
- if (op == '+') {
- *andnot |= bits;
- *or |= bits;
- }
- else if (op == '-') {
- *andnot |= bits;
- *or &= ~bits;
- }
- else if (op == '=') {
- *andnot |= U | G | O;
- *or |= bits;
- }
- } else {
- return errno = 0, -1;
- }
- }
-
- return 0;
-}
-
-
-/**
- * Parse a user name/identifier string
- *
- * @param str The user's name or identifier
- * @param uid Output parameter for the user's identifier
- * @return 0 on success, -1 on error
- */
-static int
-parse_uid(const char *str, uid_t *uid)
-{
- const char *s = str;
- int numerical = 1;
- uid_t rc = 0;
- struct passwd *pwd;
-
- if (!*s || (*s == ':'))
- return errno = 0, -1;
-
- for (s = str; *s; s++) {
- if (('0' > *s) || (*s > '9')) {
- numerical = 0;
- break;
- }
- }
-
- if (numerical) {
- for (s = str; *s; s++)
- rc = (rc * 10) + (*s & 15);
- *uid = rc;
- return 0;
- }
-
- pwd = getpwnam(str);
- if (!pwd) {
- return -1;
- }
- *uid = pwd->pw_uid;
- return 0;
-}
-
-
-/**
- * Parse a group name/identifier string
- *
- * @param str The group's name or identifier
- * @param gid Output parameter for the group's identifier
- * @return 0 on success, -1 on error
- */
-static int
-parse_gid(const char *str, gid_t *gid)
-{
- const char *s = str;
- int numerical = 1;
- gid_t rc = 0;
- struct group *grp;
-
- if (!*s || strchr(s, ':'))
- return errno = 0, -1;
-
- for (s = str; *s; s++) {
- if (('0' > *s) || (*s > '9')) {
- numerical = 0;
- break;
- }
- }
-
- if (numerical) {
- for (s = str; *s; s++)
- rc = (rc * 10) + (*s & 15);
- *gid = rc;
- return 0;
- }
-
- grp = getgrnam(str);
- if (!grp)
- return -1;
- *gid = grp->gr_gid;
- return 0;
-}
-
-
-/**
- * Parse a ownership string
- *
- * @param str The ownership string
- * @param uid Output parameter for the owner, `NULL` if `str` only contains the group
- * @param gid Output parameter for the group, `NULL` if `str` only contains the owner
- * @return 0 on success, -1 on error
- */
-static int
-parse_owner(char *str, uid_t *uid, gid_t *gid)
-{
- int r = 0;
- char* group;
-
- if (!uid)
- return parse_gid(str, gid);
- if (!gid)
- return parse_uid(str, uid);
-
- group = strchr(str, ':');
- *group++ = 0;
-
- r = parse_gid(group, gid);
- if (r)
- return r;
- return parse_uid(str, uid);
-}
-
-
-
-/**
- * Main function of the command line interface for the bus system
- *
- * @param argc The number of elements in `argv`
- * @param argv The command. Valid commands:
- * <argv0> create [-x] [--] [<path>] # create a bus
- * <argv0> remove [--] <path> # remove a bus
- * <argv0> listen [--] <path> <command> # listen for new messages
- * <argv0> wait [--] <path> <command> # listen for one new message
- * <argv0> broadcast [-n] [--] <path> <message> # broadcast a message
- * <argv0> chmod [--] <mode> <path> # change permissions
- * <argv0> chown [--] <owner>[:<group>] <path> # change ownership
- * <argv0> chgrp [--] <group> <path> # change group
- * <command> will be spawned with $arg set to the message
- * @return 0 on sucess, 1 on error, 2 on invalid command
- */
-int
-main(int argc, char *argv[])
-{
- bus_t bus;
- char *file;
- struct stat attr;
- uid_t uid;
- gid_t gid;
- mode_t mode_andnot, mode_or;
- int opt_x = 0, opt_n = 0;
- const char *arg;
- char **nonoptv = alloca((size_t)argc * sizeof(char*));
- int nonoptc = 0;
-
- argv0 = *argv++;
- argc--;
-
- /* Parse arguments. */
- while (argc) {
- if (!strcmp(*argv, "--")) {
- argv++;
- argc--;
- break;
- } else if (**argv == '-') {
- arg = *argv++;
- argc--;
- for (arg++; *arg; arg++) {
- if (*arg == 'x')
- opt_x = 1;
- else if (*arg == 'n')
- opt_n = 1;
- else
- return -2;
- }
- } else {
- *nonoptv++ = *argv++;
- nonoptc++;
- argc--;
- }
- }
- while (argc) {
- *nonoptv++ = *argv++;
- nonoptc++;
- argc--;
- }
- nonoptv -= nonoptc;
-
- /* Check options. */
- if (opt_x && strcmp(nonoptv[0], "create") && (nonoptc != 2))
- return 2;
- if (opt_n && strcmp(nonoptv[0], "broadcast") && (nonoptc != 3))
- return 2;
-
- /* Create a new bus with selected name. */
- if ((nonoptc == 2) && !strcmp(nonoptv[0], "create")) {
- t(bus_create(nonoptv[1], opt_x * BUS_EXCL, NULL));
-
- /* Create a new bus with random name. */
- } else if ((nonoptc == 1) && !strcmp(nonoptv[0], "create")) {
- t(bus_create(NULL, 0, &file));
- printf("%s\n", file);
- free(file);
-
- /* Remove a bus. */
- } else if ((nonoptc == 2) && !strcmp(nonoptv[0], "remove")) {
- t(bus_unlink(nonoptv[1]));
-
- /* Listen on a bus in a loop. */
- } else if ((nonoptc == 3) && !strcmp(nonoptv[0], "listen")) {
- command = nonoptv[2];
- t(bus_open(&bus, nonoptv[1], BUS_RDONLY));
- t(bus_read(&bus, spawn_continue, NULL));
- t(bus_close(&bus));
-
- /* Listen on a bus for one message. */
- } else if ((nonoptc == 3) && !strcmp(nonoptv[0], "wait")) {
- command = nonoptv[2];
- t(bus_open(&bus, nonoptv[1], BUS_RDONLY));
- t(bus_read(&bus, spawn_break, NULL));
- t(bus_close(&bus));
-
- /* Broadcast a message on a bus. */
- } else if ((nonoptc == 3) && !strcmp(nonoptv[0], "broadcast")) {
- t(bus_open(&bus, nonoptv[1], BUS_WRONLY));
- t(bus_write(&bus, nonoptv[2], opt_n * BUS_NOWAIT));
- t(bus_close(&bus));
-
- /* Change permissions. */
- } else if ((nonoptc == 3) && !strcmp(nonoptv[0], "chmod")) {
- t(parse_mode(nonoptv[1], &mode_andnot, &mode_or));
- t(stat(nonoptv[2], &attr));
- attr.st_mode &= ~mode_andnot;
- attr.st_mode |= mode_or;
- t(bus_chmod(nonoptv[2], attr.st_mode));
-
- /* Change ownership. */
- } else if ((nonoptc == 3) && !strcmp(nonoptv[0], "chown")) {
- if (strchr(nonoptv[1], ':')) {
- t(parse_owner(nonoptv[1], &uid, &gid));
- t(bus_chown(nonoptv[2], uid, gid));
- } else {
- t(parse_owner(nonoptv[1], &uid, NULL));
- t(stat(nonoptv[2], &attr));
- t(bus_chown(nonoptv[2], uid, attr.st_gid));
- }
-
- /* Change group. */
- } else if ((nonoptc == 3) && !strcmp(nonoptv[0], "chgrp")) {
- t(parse_owner(nonoptv[1], NULL, &gid));
- t(stat(nonoptv[2], &attr));
- t(bus_chown(nonoptv[2], attr.st_uid, gid));
-
- } else
- return 2;
-
- return 0;
-
-fail:
- if (errno == 0)
- return 2;
- perror(argv0);
- return 1;
-}
-
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