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64 lines
1.3 KiB
64 lines
1.3 KiB
#include "rsh.h" |
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#include <string.h> |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include "cache.h" |
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#define COMMAND_SIZE 4096 |
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int setup_connection(int *fd_in, int *fd_out, char *remote_prog, |
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char *url, int rmt_argc, char **rmt_argv) |
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{ |
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char *host; |
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char *path; |
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int sv[2]; |
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char command[COMMAND_SIZE]; |
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char *posn; |
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int i; |
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if (!strcmp(url, "-")) { |
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*fd_in = 0; |
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*fd_out = 1; |
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return 0; |
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} |
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host = strstr(url, "//"); |
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if (!host) { |
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return error("Bad URL: %s", url); |
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} |
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host += 2; |
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path = strchr(host, '/'); |
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if (!path) { |
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return error("Bad URL: %s", url); |
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} |
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*(path++) = '\0'; |
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/* ssh <host> 'cd /<path>; stdio-pull <arg...> <commit-id>' */ |
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snprintf(command, COMMAND_SIZE, |
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"cd /%s; %s=objects %s", |
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path, DB_ENVIRONMENT, remote_prog); |
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posn = command + strlen(command); |
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for (i = 0; i < rmt_argc; i++) { |
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*(posn++) = ' '; |
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strncpy(posn, rmt_argv[i], COMMAND_SIZE - (posn - command)); |
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posn += strlen(rmt_argv[i]); |
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if (posn - command + 4 >= COMMAND_SIZE) { |
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return error("Command line too long"); |
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} |
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} |
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strcpy(posn, " -"); |
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if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) { |
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return error("Couldn't create socket"); |
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} |
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if (!fork()) { |
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close(sv[1]); |
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dup2(sv[0], 0); |
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dup2(sv[0], 1); |
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execlp("ssh", "ssh", host, command, NULL); |
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} |
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close(sv[0]); |
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*fd_in = sv[1]; |
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*fd_out = sv[1]; |
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return 0; |
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}
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