gotsh/gotsh.c

   1 /*
   2  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "got_compat.h"
  18
  19 #include <sys/queue.h>
  20 #include <sys/socket.h>
  21 #include <sys/un.h>
  22
  23 #include <err.h>
  24 #include <event.h>
  25 #include <imsg.h>
  26 #include <limits.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31
  32 #include "got_error.h"
  33 #include "got_serve.h"
  34 #include "got_path.h"
  35 #include "got_compat.h"
  36
  37 #include "got_lib_dial.h"
  38
  39 #include "gotd.h"
  40
  41 static int chattygot;
  42
  43 __dead static void
  44 usage(void)
  45 {
  46         fprintf(stderr, "usage: %s -c '%s|%s repository-path'\n",
  47             getprogname(), GOT_DIAL_CMD_SEND, GOT_DIAL_CMD_FETCH);
  48         exit(1);
  49 }
  50
  51 static const struct got_error *
  52 apply_unveil(const char *unix_socket_path)
  53 {
  54 #ifdef PROFILE
  55         if (unveil("gmon.out", "rwc") != 0)
  56                 return got_error_from_errno2("unveil", "gmon.out");
  57 #endif
  58         if (unveil(unix_socket_path, "w") != 0)
  59                 return got_error_from_errno2("unveil", unix_socket_path);
  60
  61         if (unveil(NULL, NULL) != 0)
  62                 return got_error_from_errno("unveil");
  63
  64         return NULL;
  65 }
  66
  67 int
  68 main(int argc, char *argv[])
  69 {
  70         const struct got_error *error;
  71         const char *unix_socket_path;
  72         int gotd_sock = -1;
  73         struct sockaddr_un       sun;
  74         char *gitcmd = NULL, *command = NULL, *repo_path = NULL;
  75
  76 #ifndef PROFILE
  77         if (pledge("stdio recvfd unix unveil", NULL) == -1)
  78                 err(1, "pledge");
  79 #endif
  80
  81         unix_socket_path = getenv("GOTD_UNIX_SOCKET");
  82         if (unix_socket_path == NULL)
  83                 unix_socket_path = GOTD_UNIX_SOCKET;
  84
  85         error = apply_unveil(unix_socket_path);
  86         if (error)
  87                 goto done;
  88
  89         if (strcmp(argv[0], GOT_DIAL_CMD_SEND) == 0 ||
  90             strcmp(argv[0], GOT_DIAL_CMD_FETCH) == 0) {
  91                 if (argc != 2)
  92                         usage();
  93                 if (asprintf(&gitcmd, "%s %s", argv[0], argv[1]) == -1)
  94                         err(1, "asprintf");
  95                 error = got_dial_parse_command(&command, &repo_path, gitcmd);
  96         } else {
  97                 if (argc != 3 || strcmp(argv[1], "-c") != 0)
  98                         usage();
  99                 error = got_dial_parse_command(&command, &repo_path, argv[2]);
 100         }
 101         if (error && error->code == GOT_ERR_BAD_PACKET)
 102                 usage();
 103         if (error)
 104                 goto done;
 105
 106         if ((gotd_sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
 107                 err(1, "socket");
 108
 109         memset(&sun, 0, sizeof(sun));
 110         sun.sun_family = AF_UNIX;
 111         if (strlcpy(sun.sun_path, unix_socket_path,
 112             sizeof(sun.sun_path)) >= sizeof(sun.sun_path))
 113                 errx(1, "gotd socket path too long");
 114         if (connect(gotd_sock, (struct sockaddr *)&sun, sizeof(sun)) == -1)
 115                 err(1, "connect: %s", unix_socket_path);
 116
 117 #ifndef PROFILE
 118         if (pledge("stdio recvfd", NULL) == -1)
 119                 err(1, "pledge");
 120 #endif
 121         error = got_serve(STDIN_FILENO, STDOUT_FILENO, command, repo_path,
 122             gotd_sock, chattygot);
 123 done:
 124         free(gitcmd);
 125         free(command);
 126         free(repo_path);
 127         if (gotd_sock != -1)
 128                 close(gotd_sock);
 129         if (error) {
 130                 fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
 131                 return 1;
 132         }
 133
 134         return 0;
 135 }