connect.c

   1 #include "cache.h"
   2 #include "pkt-line.h"
   3 #include "quote.h"
   4 #include <sys/wait.h>
   5
   6 int get_ack(int fd, unsigned char *result_sha1)
   7 {
   8         static char line[1000];
   9         int len = packet_read_line(fd, line, sizeof(line));
  10
  11         if (!len)
  12                 die("git-fetch-pack: expected ACK/NAK, got EOF");
  13         if (line[len-1] == '\n')
  14                 line[--len] = 0;
  15         if (!strcmp(line, "NAK"))
  16                 return 0;
  17         if (!strncmp(line, "ACK ", 3)) {
  18                 if (!get_sha1_hex(line+4, result_sha1))
  19                         return 1;
  20         }
  21         die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
  22 }
  23
  24 int path_match(const char *path, int nr, char **match)
  25 {
  26         int i;
  27         int pathlen = strlen(path);
  28
  29         for (i = 0; i < nr; i++) {
  30                 char *s = match[i];
  31                 int len = strlen(s);
  32
  33                 if (!len || len > pathlen)
  34                         continue;
  35                 if (memcmp(path + pathlen - len, s, len))
  36                         continue;
  37                 if (pathlen > len && path[pathlen - len - 1] != '/')
  38                         continue;
  39                 *s = 0;
  40                 return 1;
  41         }
  42         return 0;
  43 }
  44
  45 /*
  46  * Yeah, yeah, fixme. Need to pass in the heads etc.
  47  */
  48 int git_connect(int fd[2], char *url, const char *prog)
  49 {
  50         char command[1024];
  51         const char *host, *path;
  52         char *colon;
  53         int pipefd[2][2];
  54         pid_t pid;
  55
  56         host = NULL;
  57         path = url;
  58         colon = strchr(url, ':');
  59         if (colon) {
  60                 *colon = 0;
  61                 host = url;
  62                 path = colon+1;
  63         }
  64         if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
  65                 die("unable to create pipe pair for communication");
  66         pid = fork();
  67         if (!pid) {
  68                 snprintf(command, sizeof(command), "%s %s", prog,
  69                          sq_quote(path));
  70                 dup2(pipefd[1][0], 0);
  71                 dup2(pipefd[0][1], 1);
  72                 close(pipefd[0][0]);
  73                 close(pipefd[0][1]);
  74                 close(pipefd[1][0]);
  75                 close(pipefd[1][1]);
  76                 if (host)
  77                         execlp("ssh", "ssh", host, command, NULL);
  78                 else
  79                         execlp("sh", "sh", "-c", command, NULL);
  80                 die("exec failed");
  81         }
  82         fd[0] = pipefd[0][0];
  83         fd[1] = pipefd[1][1];
  84         close(pipefd[0][1]);
  85         close(pipefd[1][0]);
  86         return pid;
  87 }
  88
  89 int finish_connect(pid_t pid)
  90 {
  91         int ret;
  92
  93         for (;;) {
  94                 ret = waitpid(pid, NULL, 0);
  95                 if (!ret)
  96                         break;
  97                 if (errno != EINTR)
  98                         break;
  99         }
 100         return ret;
 101 }