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-rw-r--r--printutils/lpq.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/printutils/lpq.c b/printutils/lpq.c
new file mode 100644
index 0000000..ce9a10c
--- /dev/null
+++ b/printutils/lpq.c
@@ -0,0 +1,108 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Copyright 2008 Walter Harms (WHarms@bfs.de)
+ *
+ * Licensed under the GPL v2, see the file LICENSE in this tarball.
+ */
+#include "libbb.h"
+#include "lpr.h"
+
+/*
+ this is a *very* resticted form of lpq
+ since we do not read /etc/printcap (and never will)
+ we can only do things rfc1179 allows:
+ - show print jobs for a given queue long/short form
+ - remove a job from a given queue
+
+ -P <queue>
+ -s short
+ -d delete job
+ -f force any waiting job to be printed
+*/
+enum {
+ LPQ_SHORT = 1 << 0,
+ LPQ_DELETE = 1 << 1,
+ LPQ_FORCE = 1 << 2,
+ LPQ_P = 1 << 3,
+ LPQ_t = 1 << 4,
+};
+
+/*
+ print everthing that comes
+*/
+static void get_answer(int sockfd)
+{
+ char buf[80];
+ int n;
+
+ buf[0] = '\n';
+ while (1) {
+ n = safe_read(sockfd, buf, sizeof(buf));
+ if (n <= 0)
+ break;
+ full_write(STDOUT_FILENO, buf, n);
+ buf[0] = buf[n-1]; /* last written char */
+ }
+
+ /* Don't leave last output line unterminated */
+ if (buf[0] != '\n')
+ full_write(STDOUT_FILENO, "\n", 1);
+}
+
+/*
+ is this too simple ?
+ should we support more ENV ?
+ PRINTER, LPDEST, NPRINTER, NGPRINTER
+*/
+int lpq_main(int argc, char *argv[]) MAIN_EXTERNALLY_VISIBLE;
+int lpq_main(int argc, char *argv[])
+{
+ struct netprint netprint;
+ const char *netopt;
+ const char *delopt = "0";
+ int sockfd = sockfd; /* for compiler */
+ unsigned opt;
+ int delay; /* delay in [s] */
+
+ netopt = NULL;
+ opt = getopt32(argv, "sdfP:t:", &netopt, &delopt);
+ argv += optind;
+ delay = xatoi_u(delopt);
+ parse_prt(netopt, &netprint);
+
+ /* do connect */
+ if (opt & (LPQ_FORCE|LPQ_DELETE))
+ sockfd = xconnect_stream(netprint.lsa);
+
+ /* force printing of every job still in queue */
+ if (opt & LPQ_FORCE) {
+ fdprintf(sockfd, "\x1" "%s", netprint.queue);
+ get_answer(sockfd);
+ return EXIT_SUCCESS;
+ }
+
+ /* delete job (better a list of jobs). username is now LOGNAME */
+ if (opt & LPQ_DELETE) {
+ while (*argv) {
+ fdprintf(sockfd, "\x5" "%s %s %s",
+ netprint.queue,
+ getenv("LOGNAME"), /* FIXME - may be NULL? */
+ *argv);
+ get_answer(sockfd);
+ argv++;
+ }
+ return EXIT_SUCCESS;
+ }
+
+ do {
+ sockfd = xconnect_stream(netprint.lsa);
+ fdprintf(sockfd, "%c%s\n", (opt & LPQ_SHORT) ? 3 : 4,
+ netprint.queue);
+
+ get_answer(sockfd);
+ close(sockfd);
+ sleep(delay);
+ } while (delay != 0);
+
+ return EXIT_SUCCESS;
+}