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cb3b8c1 May 29, 2011
131 lines (115 sloc) 3.56 KB
#include "xdo_cmd.h"
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
int cmd_exec(context_t *context) {
char *cmd = *context->argv;
char **command = NULL;
int command_count = 0;
int ret = EXIT_SUCCESS;
int opsync = 0;
int arity = -1;
char *terminator = NULL;
int c, i;
typedef enum {
opt_unused, opt_help, opt_sync, opt_args, opt_terminator
} optlist_t;
static struct option longopts[] = {
{ "help", no_argument, NULL, opt_help },
{ "sync", no_argument, NULL, opt_sync },
{ "args", required_argument, NULL, opt_args },
{ "terminator", required_argument, NULL, opt_terminator },
{ 0, 0, 0, 0 },
};
static const char *usage =
"Usage: %s [options] command [arg1 arg2 ...] [terminator]\n"
"--sync - only exit when the command given finishes. The default\n"
" is to fork a child process and continue.\n"
"--args N - how many arguments to expect in the exec command. This is\n"
" useful for ending an exec and continuing with more xdotool\n"
" commands\n"
"--terminator TERM - similar to --args, specifies a terminator that\n"
" marks the end of 'exec' arguments. This is useful\n"
" for continuing with more xdotool commands.\n"
"\n"
"Unless --args OR --terminator is specified, the exec command is assumed\n"
"to be the remainder of the command line.\n";
int option_index;
while ((c = getopt_long_only(context->argc, context->argv, "+h",
longopts, &option_index)) != -1) {
switch (c) {
case 'h':
case opt_help:
printf(usage, cmd);
consume_args(context, context->argc);
return EXIT_SUCCESS;
break;
case opt_sync:
opsync = 1;
break;
case opt_args:
arity = atoi(optarg);
break;
case opt_terminator:
terminator = strdup(optarg);
break;
default:
fprintf(stderr, usage, cmd);
return EXIT_FAILURE;
}
}
consume_args(context, optind);
if (context->argc == 0) {
fprintf(stderr, "No arguments given.\n");
fprintf(stderr, usage, cmd);
return EXIT_FAILURE;
}
if (arity > 0 && terminator != NULL) {
fprintf(stderr, "Don't use both --terminator and --args.\n");
return EXIT_FAILURE;
}
if (context->argc < arity) {
fprintf(stderr, "You said '--args %d' but only gave %d arguments.\n",
arity, context->argc);
return EXIT_FAILURE;
}
command = calloc(context->argc + 1, sizeof(char *));
for (i=0; i < context->argc; i++) {
if (arity > 0 && i == arity) {
break;
}
/* if we have a terminator and the current argument matches it... */
if (terminator != NULL && strcmp(terminator, context->argv[i]) == 0) {
command_count++; /* Consume the terminator, too */
break;
}
command[i] = strdup(context->argv[i]);
command_count = i + 1; /* i starts at 0 */
xdotool_debug(context, "Exec arg[%d]: %s", i, command[i]);
}
command[i] = NULL;
pid_t child;
child = fork();
if (child == 0) { /* child */
execvp(command[0], command);
/* if we get here, there was an error */
perror("execvp failed");
exit(errno);
} else { /* parent */
if (opsync) {
int status = 0;
waitpid(child, &status, 0);
ret = WEXITSTATUS(status);
}
}
consume_args(context, command_count);
if (terminator != NULL) {
free(terminator);
}
for (i=0; i < command_count; i++) {
free(command[i]);
}
free(command);
return ret;
}
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