git.mutantstargoat.com Git - reposerve/blob - server/src/main.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <errno.h>
   5 #include <limits.h>
   6 #include <time.h>
   7 #include <unistd.h>
   8 #include <sys/types.h>
   9 #include <sys/socket.h>
  10 #include <sys/select.h>
  11 #include <netinet/in.h>
  12 #include "repo.h"
  13 #include "client.h"
  14
  15 static const char *guess_repo_name(const char *path);
  16 static int parse_args(int argc, char **argv);
  17
  18 static const char *repo_path, *repo_name;
  19 static int lis = -1;
  20 static int port = 64357;
  21
  22 static struct client *clients;
  23
  24 int main(int argc, char **argv)
  25 {
  26         struct sockaddr_in addr;
  27
  28         if(parse_args(argc, argv) == -1) {
  29                 return 1;
  30         }
  31
  32         if(repo_init(repo_path) == -1) {
  33                 return 1;
  34         }
  35         /* repo_cleanup(); */
  36
  37         if(!repo_name) {
  38                 if(!(repo_name = guess_repo_name(repo_path))) {
  39                         return 1;
  40                 }
  41         }
  42
  43         printf("Serving %s from %s\n", repo_name, repo_path);
  44
  45         if(!(lis = socket(PF_INET, SOCK_STREAM, 0))) {
  46                 fprintf(stderr, "failed to create socket: %s\n", strerror(errno));
  47                 return 1;
  48         }
  49
  50         memset(&addr, 0, sizeof addr);
  51         addr.sin_family = AF_INET;
  52         addr.sin_port = htons(port);
  53         addr.sin_addr.s_addr = INADDR_ANY;
  54
  55         if(bind(lis, (struct sockaddr*)&addr, sizeof addr) == -1) {
  56                 fprintf(stderr, "failed to bind listening socket to port %d\n", port);
  57                 return 1;
  58         }
  59         listen(lis, 8);
  60
  61         for(;;) {
  62                 int res, max_fd, s;
  63                 fd_set rdset;
  64                 struct client *c, dummy;
  65
  66                 FD_SET(lis, &rdset);
  67                 max_fd = lis;
  68
  69                 c = clients;
  70                 while(c) {
  71                         FD_SET(c->s, &rdset);
  72                         if(c->s > max_fd) max_fd = c->s;
  73                         c = c->next;
  74                 }
  75
  76                 if((res = select(max_fd + 1, &rdset, 0, 0, 0)) == -1 && errno != EINTR) {
  77                         perror("select failed");
  78                         break;
  79                 }
  80
  81                 if(res <= 0) continue;
  82
  83                 dummy.next = clients;
  84                 c = &dummy;
  85                 while(c->next) {
  86                         if(FD_ISSET(c->next->s, &rdset)) {
  87                                 if(handle_client(c->next) == -1) {
  88                                         struct client *tmp = c->next;
  89                                         c->next = tmp->next;
  90                                         close(tmp->s);
  91                                         free(tmp);
  92                                         continue;
  93                                 }
  94                         }
  95                         c = c->next;
  96                 }
  97                 clients = dummy.next;
  98
  99                 if(FD_ISSET(lis, &rdset)) {
 100                         if((s = accept(lis, 0, 0)) == -1) {
 101                                 perror("failed to accept connection");
 102                                 continue;
 103                         }
 104                         if(!(c = malloc(sizeof *c))) {
 105                                 perror("failed to allocate memory for client structure");
 106                                 close(s);
 107                                 continue;
 108                         }
 109                         c->s = s;
 110                         c->next = clients;
 111                         clients = c;
 112                 }
 113         }
 114
 115         return 0;
 116 }
 117
 118 static const char *guess_repo_name(const char *path)
 119 {
 120         static char pathbuf[PATH_MAX];
 121         char *last_slash;
 122         int len;
 123
 124         if(!realpath(path, pathbuf)) {
 125                 goto fail;
 126         }
 127         len = strlen(pathbuf);
 128
 129         if(len > 0 && pathbuf[len - 1] == '/') {
 130                 pathbuf[--len] = 0;
 131         }
 132         if(len <= 0) goto fail;
 133
 134         if((last_slash = strrchr(pathbuf, '/'))) {
 135                 return last_slash + 1;
 136         }
 137         return pathbuf;
 138
 139 fail:
 140         fprintf(stderr, "failed to resolve path %s while determining the repo name. Please specify an explicit name with -id\n", repo_path);
 141         return 0;
 142 }
 143
 144 static void print_usage(const char *argv0)
 145 {
 146         printf("Usage: %s [options] [repo path]\n", argv0);
 147         printf("options:\n");
 148         printf("  -id <name>: repo identifier (defaults to directory name)\n");
 149         printf("  -h,-help: print help and exit\n");
 150 }
 151
 152 static int parse_args(int argc, char **argv)
 153 {
 154         int i;
 155
 156         for(i=1; i<argc; i++) {
 157                 if(argv[i][0] == '-') {
 158                         if(strcmp(argv[i], "-id") == 0) {
 159                                 repo_name = argv[++i];
 160                         } else if(strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "-help") == 0) {
 161                                 print_usage(argv[0]);
 162                                 exit(0);
 163                         } else {
 164                                 fprintf(stderr, "invalid option: %s\n", argv[i]);
 165                                 return -1;
 166                         }
 167                 } else {
 168                         if(repo_path) {
 169                                 fprintf(stderr, "unexpected argument: %s\n", argv[i]);
 170                                 return -1;
 171                         }
 172                         repo_path = argv[i];
 173                 }
 174         }
 175
 176         if(!repo_path) repo_path = ".";
 177         return 0;
 178 }