static int run_argv(int *argcp, const char ***argv)
{
int done_alias = 0;
while (1) {
/* See if it's a builtin */
handle_builtin(*argcp, *argv);
/* .. then try the external ones */
execv_dashed_external(*argv);
/* It could be an alias -- this works around the insanity
* of overriding "git log" with "git show" by having
* alias.log = show
*/
if (done_alias || !handle_alias(argcp, argv))
break;
done_alias = 1;
}
return done_alias;
}
int cmd_main(int argc, const char **argv)
{
const char *cmd;
int done_help = 0;
cmd = argv[0];
if (!cmd)
cmd = "git-help";
else {
const char *slash = find_last_dir_sep(cmd);
if (slash)
cmd = slash + 1;
}
/*
* wait_for_pager_atexit will close stdout/stderr so it needs to be
* registered first so that it will execute last and not close the
* handles until all other atexit handlers have finished
*/
atexit(wait_for_pager_atexit);
trace_command_performance(argv);
atexit(post_command_hook_atexit);
/*
* "git-xxxx" is the same as "git xxxx", but we obviously:
*
* - cannot take flags in between the "git" and the "xxxx".
* - cannot execute it externally (since it would just do
* the same thing over again)
*
* So we just directly call the builtin handler, and die if
* that one cannot handle it.
*/
if (skip_prefix(cmd, "git-", &cmd)) {
argv[0] = cmd;
handle_builtin(argc, argv);
die("cannot handle %s as a builtin", cmd);
}
/* Look for flags.. */
argv++;
argc--;
handle_options(&argv, &argc, NULL);
if (argc > 0) {
/* translate --help and --version into commands */
skip_prefix(argv[0], "--", &argv[0]);
} else {
/* The user didn't specify a command; give them help */
commit_pager_choice();
if (run_pre_command_hook(argv))
die("pre-command hook aborted command");
printf("usage: %s\n\n", git_usage_string);
list_common_cmds_help();
printf("\n%s\n", _(git_more_info_string));
exit_code = 1;
run_post_command_hook();
exit(exit_code);
}
cmd = argv[0];
/*
* We use PATH to find git commands, but we prepend some higher
* precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
* environment, and the $(gitexecdir) from the Makefile at build
* time.
*/
setup_path();
while (1) {
int was_alias = run_argv(&argc, &argv);
if (errno != ENOENT)
break;
if (was_alias) {
fprintf(stderr, _("expansion of alias '%s' failed; "
"'%s' is not a git command\n"),
cmd, argv[0]);
exit(1);
}
if (!done_help) {
cmd = argv[0] = help_unknown_cmd(cmd);
done_help = 1;
} else
break;
}
fprintf(stderr, _("failed to run command '%s': %s\n"),
cmd, strerror(errno));
return 1;
}
int main(int argc, char **av)
{
const char **argv = (const char **) av;
const char *cmd;
startup_info = &git_startup_info;
cmd = git_extract_argv0_path(argv[0]);
if (!cmd)
cmd = "git-help";
/*
* Always open file descriptors 0/1/2 to avoid clobbering files
* in die(). It also avoids messing up when the pipes are dup'ed
* onto stdin/stdout/stderr in the child processes we spawn.
*/
sanitize_stdfds();
git_setup_gettext();
/*
* "git-xxxx" is the same as "git xxxx", but we obviously:
*
* - cannot take flags in between the "git" and the "xxxx".
* - cannot execute it externally (since it would just do
* the same thing over again)
*
* So we just directly call the builtin handler, and die if
* that one cannot handle it.
*/
if (starts_with(cmd, "git-")) {
cmd += 4;
argv[0] = cmd;
handle_builtin(argc, argv);
die("cannot handle %s as a builtin", cmd);
}
/* Look for flags.. */
argv++;
argc--;
handle_options(&argv, &argc, NULL);
if (argc > 0) {
if (starts_with(argv[0], "--"))
argv[0] += 2;
} else {
/* The user didn't specify a command; give them help */
commit_pager_choice();
printf("usage: %s\n\n", git_usage_string);
list_common_cmds_help();
printf("\n%s\n", _(git_more_info_string));
exit(1);
}
cmd = argv[0];
/*
* We use PATH to find git commands, but we prepend some higher
* precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
* environment, and the $(gitexecdir) from the Makefile at build
* time.
*/
setup_path();
while (1) {
static int done_help = 0;
static int was_alias = 0;
was_alias = run_argv(&argc, &argv);
if (errno != ENOENT)
break;
if (was_alias) {
fprintf(stderr, "Expansion of alias '%s' failed; "
"'%s' is not a git command\n",
cmd, argv[0]);
exit(1);
}
if (!done_help) {
cmd = argv[0] = help_unknown_cmd(cmd);
done_help = 1;
} else
break;
}
fprintf(stderr, "Failed to run command '%s': %s\n",
cmd, strerror(errno));
return 1;
}
void execute(char *cmdline, char **argv)
{
char *cmd = cmdline;
if(strlen(cmd) > 4)
{
if(strncmp(cmd, "res=", 4)==0)
{
point5(cmdline);
return;
}
}
if(strlen(cmdline)<=0)
return;
// 0 for stdout; 1 for redirect; 2 for pipeline
int out_type = 0;
char *childcmd[2];
childcmd[0] = cmdline;
while(*cmdline != '>' && *cmdline != '|' &&
*cmdline != '$' &&
*cmdline != '\0' && *cmdline != '\n')
{
cmdline++;
}
if(*cmdline=='>')
{
out_type = 1;
*cmdline++ = '\0';
childcmd[1] = cmdline;
}
else if(*cmdline=='|')
{
out_type = 2;
*cmdline++ = '\0';
childcmd[1] = cmdline;
}
else if(*cmdline=='$')
{
if(strncmp(cmdline, "$(", 2)==0)
{
out_type = 3;
*cmdline++ = '\0';
childcmd[1] = cmdline;
}
}
int n = strlen(childcmd[0]) - 1;
while(n>0)
{
if(childcmd[0][n]==' ')
{
childcmd[0][n]='\0';
}
else
break;
n--;
}
while(*childcmd[1] != '\0')
{
if(*childcmd[1]==' ')
childcmd[1]++;
else
break;
}
parse_cmdline(childcmd[0], argv);
int ret = handle_builtin(argv);
if(ret==0)
return;
pid_t childpid;
int status, options = 0;
childpid = fork();
if (childpid == -1)
{
perror("Cannot proceed. fork() error");
exit(1);
}
else if (childpid == 0)
{
// This is child's process.
if(out_type==0)
{
childexec(argv);
}
else if(out_type==1)
{// output redirection here
int fd;
close(STDOUT);
fd = open(childcmd[1], O_APPEND);
if(fd<0)
{
fd = creat(childcmd[1], 0666);
if(fd<0)
{
perror("create file failed");
exit(-1);
}
}
dup(fd);
childexec(argv);
close(fd);
}
else if(out_type==2)
{// pipeline here
int fd[2];
pipe(&fd[0]);
if(fork()!=0)
{
close(fd[0]);
close(STDOUT);
dup(fd[1]);
childexec(argv);
close(fd[1]);
}
else
{
close(fd[1]);
close(STDIN);
dup(fd[0]);
parse_cmdline(childcmd[1], argv);
childexec(argv);
close(fd[0]);
}
puts("\n");
}
else if(out_type==3)
{
childcmd[1]++;
size_t len = strlen(childcmd[1]);
childcmd[1][len-1] = '\0';
printf("childcmd[0]:%s\n", childcmd[0]);
printf("childcmd[1]:%s\n", childcmd[1]);
int fd[2];
pipe(fd);
if(fork()!=0)
{
close(fd[1]);
close(STDIN);
dup(fd[0]);
childexecline(childcmd[0]);
close(fd[0]);
}
else
exec_pipelines(childcmd[1], fd,argv);
/*
parse_cmdline(childcmd[1], argv);
int fd[2];
pipe(&fd[0]);
if(fork()!=0)
{
close(fd[0]);
close(STDOUT);
dup(fd[1]);
childexec(argv);
close(fd[1]);
}
else
{
close(fd[1]);
close(STDIN);
dup(fd[0]);
parse_cmdline(childcmd[0], argv);
childexec(argv);
close(fd[0]);
}
*/
puts("\n");
}
}
else
{
waitpid(childpid, &status, options);
if (!WIFEXITED(status))
printf("Parent: child has not terminated normally.\n");
}
}