diff options
Diffstat (limited to 'printutils/lpr.c')
| -rw-r--r-- | printutils/lpr.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/printutils/lpr.c b/printutils/lpr.c index 4f3b024..25cbcbc 100644 --- a/printutils/lpr.c +++ b/printutils/lpr.c @@ -149,6 +149,7 @@ int lpqr_main(int argc UNUSED_PARAM, char *argv[]) // process files do { + unsigned cflen; int dfd; struct stat st; char *c; @@ -194,23 +195,30 @@ int lpqr_main(int argc UNUSED_PARAM, char *argv[]) ); // delete possible "\nX\n" patterns c = controlfile; + cflen = (unsigned)strlen(controlfile); while ((c = strchr(c, '\n')) != NULL) { - c++; - while (c[0] && c[1] == '\n') - memmove(c, c+2, strlen(c+1)); /* strlen(c+1) == strlen(c+2) + 1 */ + if (c[1] && c[2] == '\n') { + /* can't use strcpy, results are undefined */ + memmove(c, c+2, cflen - (c-controlfile) - 1); + cflen -= 2; + } else { + c++; + } } // send control file if (opts & LPR_V) bb_error_msg("sending control file"); + /* "Acknowledgement processing must occur as usual + * after the command is sent." */ + fdprintf(fd, "\x2" "%u c%s\n", cflen, remote_filename); + get_response_or_say_and_die(fd, "sending control file"); /* "Once all of the contents have * been delivered, an octet of zero bits is sent as * an indication that the file being sent is complete. * A second level of acknowledgement processing * must occur at this point." */ - fdprintf(fd, "\x2" "%u c%s\n" "%s" "%c", - (unsigned)strlen(controlfile), - remote_filename, controlfile, '\0'); + full_write(fd, controlfile, cflen + 1); /* writes NUL byte too */ get_response_or_say_and_die(fd, "sending control file"); // send data file, with name "dfaXXX" @@ -219,6 +227,7 @@ int lpqr_main(int argc UNUSED_PARAM, char *argv[]) st.st_size = 0; /* paranoia: fstat may theoretically fail */ fstat(dfd, &st); fdprintf(fd, "\x3" "%"OFF_FMT"u d%s\n", st.st_size, remote_filename); + get_response_or_say_and_die(fd, "sending data file"); if (bb_copyfd_size(dfd, fd, st.st_size) != st.st_size) { // We're screwed. We sent less bytes than we advertised. bb_error_msg_and_die("local file changed size?!"); |