| 22,21 → 22,21 |
|---|
| * DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include <string.h> /* memset() */ |
| |
| #include "doserr.h" |
| #include "helpers.h" |
| #include "rmodinit.h" |
| |
| #include "redir.h" |
| |
| static unsigned short oldstdout = 0xffff; |
| |
| |
| /* parse commandline and performs necessary redirections. cmdline is |
| * modified so all redirections are cut out. |
| * returns 0 on success, non-zero otherwise */ |
| int redir_parsecmd(char *cmdline, char *BUFFER) { |
| * modified so all redirections are cut out. */ |
| void redir_parsecmd(struct redir_data *d, char *cmdline) { |
| unsigned short i; |
| unsigned short rediroffset_stdin = 0; |
| unsigned short rediroffset_stdout = 0; |
| unsigned short pipesoffsets[16]; |
| unsigned short pipescount = 0; |
| |
| /* NOTE: |
| 53,51 → 53,51 |
|---|
| /* preset oldstdout to 0xffff in case no redirection is required */ |
| oldstdout = 0xffff; |
| |
| /* clear out the redir_data struct */ |
| memset(d, 0, sizeof(*d)); |
| |
| /* parse the command line and fill struct with pointers */ |
| for (i = 0;; i++) { |
| if (cmdline[i] == '>') { |
| cmdline[i] = 0; |
| rediroffset_stdout = i + 1; |
| if (cmdline[i + 1] == '>') { |
| i++; |
| d->stdout_openflag = 0x11; /* used during int 21h,AH=6C */ |
| } else { |
| d->stdout_openflag = 0x12; |
| } |
| d->stdoutfile = cmdline + i + 1; |
| while (d->stdoutfile[0] == ' ') d->stdoutfile++; |
| } else if (cmdline[i] == '<') { |
| cmdline[i] = 0; |
| rediroffset_stdin = i + 1; |
| d->stdinfile = cmdline + i + 1; |
| while (d->stdinfile[0] == ' ') d->stdinfile++; |
| } else if (cmdline[i] == '|') { |
| cmdline[i] = 0; |
| pipesoffsets[pipescount++] = i + 1; |
| if (pipescount < REDIR_MAX_PIPES) { |
| d->pipes[pipescount++] = cmdline + i + 1; |
| while (d->pipes[pipescount][0] == ' ') d->pipes[pipescount]++; |
| } |
| } else if (cmdline[i] == 0) { |
| break; |
| } |
| } |
| } |
| |
| if (rediroffset_stdin != 0) { |
| |
| /* apply stdin/stdout redirections defined in redir_data, returns 0 on success */ |
| int redir_apply(const struct redir_data *d) { |
| if (d->stdinfile != NULL) { |
| outputnl("ERROR: stdin redirection is not supported yet"); |
| return(-1); |
| } |
| |
| if (pipescount != 0) { |
| outputnl("ERROR: pipe redirections are not supported yet"); |
| return(-1); |
| } |
| |
| if (rediroffset_stdout != 0) { |
| unsigned short openflag = 0x12; /* used during the int 21h,ah=6c call */ |
| if (d->stdoutfile != NULL) { |
| unsigned short openflag = d->stdout_openflag; |
| unsigned short errcode = 0; |
| unsigned short handle = 0; |
| char *ptr; |
| /* append? */ |
| if (cmdline[rediroffset_stdout] == '>') { |
| openflag = 0x11; |
| rediroffset_stdout++; |
| } |
| const char *myptr = d->stdoutfile; |
| |
| /* copy dst file to BUFFER */ |
| ptr = cmdline + rediroffset_stdout; |
| while (*ptr == ' ') ptr++; /* skip leading white spaces */ |
| for (i = 0;; i++) { |
| BUFFER[i] = ptr[i]; |
| if ((BUFFER[i] == ' ') || (BUFFER[i] == 0)) break; |
| } |
| BUFFER[i] = 0; |
| |
| /* */ |
| _asm { |
| push ax |
| 109,7 → 109,7 |
|---|
| mov bx, 1 /* access mode (0=read, 1=write, 2=r+w */ |
| xor cx, cx /* attributes when(if) creating the file (0=normal) */ |
| mov dx, [openflag] /* action if file exists (0x11=open, 0x12=truncate)*/ |
| mov si, BUFFER /* ASCIIZ filename */ |
| mov si, myptr /* ASCIIZ filename */ |
| int 0x21 /* AX=handle on success (CF clear), otherwise dos err */ |
| mov [handle], ax /* save the file handler */ |
| jnc DUPSTDOUT |