diff options
author | Alan Coopersmith <alan.coopersmith@oracle.com> | 2023-02-11 17:04:31 -0800 |
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committer | Alan Coopersmith <alan.coopersmith@oracle.com> | 2023-02-11 17:06:07 -0800 |
commit | 1a829930f7b5b00e5fa128c6dd0dd1a7c4065213 (patch) | |
tree | c6949839c354104b53023d0af60b5080a964099c /xrefresh.c | |
parent | 1b141ab13d101fa7a2c4ab3a220307643d419655 (diff) |
Add -help option
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Diffstat (limited to 'xrefresh.c')
-rw-r--r-- | xrefresh.c | 19 |
1 files changed, 12 insertions, 7 deletions
@@ -70,9 +70,11 @@ static Window win; static char *ProgramName; static void _X_NORETURN _X_COLD -Syntax(void) +Syntax(int exitval) { - fprintf (stderr, "usage: %s [-options] [geometry] [display]\n\n%s", + FILE *out = (exitval == EXIT_SUCCESS) ? stdout : stderr; + + fprintf (out, "usage: %s [-options] [geometry] [display]\n\n%s", ProgramName, "where the available options are:\n" " -display host:dpy or -d\n" @@ -85,22 +87,22 @@ Syntax(void) " -delay ms time to hold refresh\n" " -version print program version\n" ); - fprintf(stderr, "\nThe default is: %s -none -delay 0\n\n", ProgramName); - exit (1); + fprintf(out, "\nThe default is: %s -none -delay 0\n\n", ProgramName); + exit (exitval); } static void _X_NORETURN _X_COLD missing_arg(const char *arg) { fprintf (stderr, "%s: %s requires an argument\n\n", ProgramName, arg); - Syntax (); + Syntax (EXIT_FAILURE); } static void _X_NORETURN _X_COLD unknown_arg(const char *arg) { fprintf (stderr, "%s: unrecognized argument %s\n\n", ProgramName, arg); - Syntax (); + Syntax (EXIT_FAILURE); } /* @@ -238,7 +240,10 @@ main(int argc, char *argv[]) } else if (isabbreviation ("-version", arg, 1)) { puts(PACKAGE_STRING); - exit(0); + exit(EXIT_SUCCESS); + } + else if (isabbreviation ("-help", arg, 1)) { + Syntax(EXIT_SUCCESS); } else unknown_arg (arg); } else if (arg[0] == '=') /* obsolete */ |