static void RunBuiltInCmd(commandT* cmd) {
if (cmd->fd_in != STDIN_FILENO) {
dup2(cmd->fd_in, STDIN_FILENO);
close(cmd->fd_in);
}
if (cmd->fd_out != STDOUT_FILENO) {
dup2(cmd->fd_out, STDOUT_FILENO);
close(cmd->fd_out);
}
if (!strcmp(cmd->argv[0], "alias")) {
if (cmd->argc == 1) {
DisplayAlias(alist);
} else {
char* cmdline = strdup(cmd->cmdline);
strsep(&cmdline, " ");
AddAlias(&alist, cmdline);
}
} else if (!strcmp(cmd->argv[0], "cd")) {
char* dir = NULL;
char err[256];
if (cmd->argc == 1) {
dir = getenv("HOME");
} else {
if ((cmd->argv[1])[0] == '~') {
char* fulldir = (char*)malloc(sizeof(char) * 256);
char* homedir = getenv("HOME");
strcat(fulldir, homedir);
if (strlen(cmd->argv[1]) > 2) {
char subdir[128];
memcpy(subdir, &(cmd->argv[1])[1], strlen(cmd->argv[1]) - 1);
subdir[strlen(cmd->argv[1])] = 0;
strcat(fulldir, subdir);
}
dir = fulldir;
} else {
dir = cmd->argv[1];
}
}
sprintf(err, "cd: fail to change directory: %s\n", dir);
if (chdir(dir)) {
perror(err);
}
} else if (!strcmp(cmd->argv[0], "bg")) {
if (cmd->argc == 1) BGJob(bgjobs, -1);
else BGJob(bgjobs, atoi(cmd->argv[1]));
} else if (!strcmp(cmd->argv[0], "fg")) {
if (cmd->argc == 1) FGJob(bgjobs, -1);
else FGJob(bgjobs, atoi(cmd->argv[1]));
} else if (!strcmp(cmd->argv[0], "jobs")) {
DisplayJobs(bgjobs);
} else if (!strcmp(cmd->argv[0], "unalias")) {
if (cmd->argc == 1) {
printf("unalias: not enough arguments\n");
} else {
DelAlias(&alist, cmd->argv[1]);
}
}
if (cmd->fd_in != STDIN_FILENO) {
close(cmd->fd_in);
}
if (cmd->fd_out != STDOUT_FILENO) {
close(cmd->fd_out);
}
}
DWORD _CRTAPI1
main(
int argc,
char *argv[]
)
{
DWORD rc;
char *s, *s1, *AliasName;
char *ExeName;
BOOL fDelete;
BOOL DisplayAllAliases;
ConvertAppToOem( argc,argv );
AliasName = NULL;
ExeName = NULL;
fVerbose = FALSE;
fDelete = FALSE;
DisplayAllAliases = TRUE;
rc = NO_ERROR;
while (rc == NO_ERROR && --argc) {
s = *++argv;
if (*s == '-' || *s == '/') {
while (*++s) {
switch( *s ) {
case '?':
case 'h':
case 'H':
usage();
break;
case 'd':
case 'D':
fDelete = TRUE;
break;
case 'v':
case 'V':
fVerbose = TRUE;
break;
case 'p':
case 'P':
if (!--argc) {
fprintf( stderr, "ALIAS: Argument to -p switch missing.\n" );
usage();
}
if (ExeName != NULL) {
free( ExeName );
ExeName = NULL;
}
s1 = *++argv;
ExeName = calloc( 1, strlen( s1 )+2 );
strcpy( ExeName, s1 );
break;
case 'f':
case 'F':
if (!--argc) {
fprintf( stderr, "ALIAS: Argument to -f switch missing.\n" );
usage();
}
DisplayAllAliases = FALSE;
rc = DoAliasFile( *++argv, ExeName ? ExeName : "CMD.EXE", fDelete );
break;
default:
fprintf( stderr, "ALIAS: invalid switch /%c\n", *s );
usage();
break;
}
}
}
else {
DisplayAllAliases = FALSE;
if (AliasName == NULL) {
if (fDelete) {
rc = DoAlias( s, NULL, ExeName ? ExeName : "CMD.EXE" );
}
else {
AliasName = s;
}
}
else {
if (fDelete) {
rc = DoAlias( AliasName, NULL, ExeName ? ExeName : "CMD.EXE" );
AliasName = s;
}
else {
rc = DoAlias( AliasName, s, ExeName ? ExeName : "CMD.EXE" );
AliasName = NULL;
}
}
}
}
if (rc == NO_ERROR) {
if (AliasName != NULL) {
if (fDelete) {
rc = DoAlias( AliasName, NULL, ExeName ? ExeName : "CMD.EXE" );
}
else {
rc = DisplayAlias( AliasName, ExeName ? ExeName : "CMD.EXE" );
}
}
else
if (DisplayAllAliases) {
rc = DisplayAliases( ExeName );
}
}
if (ExeName != NULL) {
free( ExeName );
ExeName = NULL;
}
exit( rc );
return rc;
}
