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author | David Oberhollenzer <david.oberhollenzer@tele2.at> | 2018-03-25 01:59:38 +0100 |
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committer | David Oberhollenzer <david.oberhollenzer@tele2.at> | 2018-03-25 01:59:38 +0100 |
commit | b9d829bc9abe0f5ce0234475505b33fe5b942cb4 (patch) | |
tree | 62254553207ba3af0e11e5a4bc3b19407cc4cf2a /servicecmd/servicecmd.c | |
parent | f97add9041c7cf330d2743b1dca9267676bdaa72 (diff) |
Cleanup command error handling in "service"
- Add helper for checking number of arguments
- Add helper for printing "please read help" message
Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
Diffstat (limited to 'servicecmd/servicecmd.c')
-rw-r--r-- | servicecmd/servicecmd.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/servicecmd/servicecmd.c b/servicecmd/servicecmd.c index ff37740..84e6a32 100644 --- a/servicecmd/servicecmd.c +++ b/servicecmd/servicecmd.c @@ -55,6 +55,23 @@ void usage(int status) exit(status); } +void tell_read_help(const char *cmd) +{ + fprintf(stderr, "Try `%s help %s' for more information.\n", + __progname, cmd); +} + +int check_arguments(const char *cmd, int argc, int minc, int maxc) +{ + if (argc >= minc && argc <= maxc) + return 0; + + fprintf(stderr, "Too %s arguments for `%s'\n", + argc > maxc ? "many" : "few", cmd); + tell_read_help(cmd); + return -1; +} + int main(int argc, char **argv) { command_t *cmd; |