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authorMattias Andrée <maandree@member.fsf.org>2015-12-23 21:02:47 +0100
committerMattias Andrée <maandree@member.fsf.org>2015-12-23 21:02:47 +0100
commit0a1a9b8356357e5d744f8a94061fc1d42ae0c009 (patch)
treedac07b2f565120c270dca680af4f8471e214a7e9 /src/sat.c
parentreadme: considerations when using autohaltd too (diff)
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parse arguments
Signed-off-by: Mattias Andrée <maandree@member.fsf.org>
Diffstat (limited to '')
-rw-r--r--src/sat.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/src/sat.c b/src/sat.c
new file mode 100644
index 0000000..4860a4d
--- /dev/null
+++ b/src/sat.c
@@ -0,0 +1,103 @@
+/**
+ * Copyright © 2015 Mattias Andrée <maandree@member.fsf.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "parse_time.h"
+
+
+
+/**
+ * The name of the process.
+ */
+char *argv0 = "sat";
+
+
+
+/**
+ * Print usage information.
+ */
+static void
+usage(void)
+{
+ fprintf(stderr, "usage: %s TIME COMMAND...\n",
+ strrchr(argv0) ? (strrchr(argv0) + 1) : argv0);
+ exit(2);
+}
+
+
+/**
+ * Queue a job for later execution.
+ *
+ * @param argc You guess!
+ * @param argv The first element should be the name of the process,
+ * the second argument should be the POSIX time (seconds
+ * since Epoch (1970-01-01 00:00:00 UTC), disregarding
+ * leap seconds) the job shall be executed. The rest of
+ * the arguments (being at least one) shoul be the
+ * command line arguments for the job the run.
+ * @return 0 The process was successful.
+ * @return 1 The process failed queuing the job.
+ * @return 2 User error, you do not know what you are doing.
+ * @return 3 satd(1) failed to queue the job.
+ */
+int
+main(int argc, char *argv[])
+{
+ struct timespec ts;
+ clockid_t clk;
+
+ if ((argc < 3) || (argv[1][0] == '-')) {
+ usage();
+ }
+
+ argv0 = argv[0];
+
+ if (parse_time(str, &ts, &clk)) {
+ switch (errno) {
+ case EINVAL:
+ fprintf(stderr,
+ "%s: time parameter cound not be parsed, perhaps you "
+ "you need an external parser: %s\n", argv0, str);
+ return 2;
+ case ERANGE:
+ fprintf(stderr,
+ "%s: the specified time is beyond the limit of what "
+ "can be represented by `struct timespec`: %s\n", argv0, str);
+ return 2;
+ case EDOM:
+ fprintf(stderr,
+ "%s: the specified time is in past, and more than "
+ "a day ago: %s\n", argv0, str);
+ return 2;
+ default:
+ goto fail;
+ }
+ }
+
+fail:
+ perror(argv0);
+ return 1;
+}
+