FreeCalypso > hg > freecalypso-sw
view rvinterf/etmsync/fileio.c @ 357:22c6e39e1789
target-utils/tf-breakin: build embeddable form of the payload
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Thu, 15 May 2014 09:49:30 +0000 |
parents | ffeea2f9d149 |
children | d1333db6385f |
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/* * FFS2 file descriptor I/O operations */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include "etm.h" #include "ffs.h" #include "tmffs2.h" #include "limits.h" #include "localtypes.h" #include "localstruct.h" #include "exitcodes.h" extern u_char rvi_msg[]; extern int rvi_msg_len; fd_open(pathname, flags, fdrtn) char *pathname; int flags, *fdrtn; { u_char cmdpkt[MAX_PKT_TO_TARGET], *dp; int rc, slen; slen = strlen(pathname); if (slen >= TMFFS_STRING_SIZE) { printf("error: pathname arg exceeds string length limit\n"); return(ERROR_USAGE); } dp = cmdpkt + 1; *dp++ = ETM_FFS2; *dp++ = TMFFS_OPEN; *dp++ = slen + 1; strcpy(dp, pathname); dp += slen + 1; *dp++ = flags; rc = etm_pkt_exch(cmdpkt, dp - cmdpkt - 1); if (rc) return(rc); if (rvi_msg[3]) { report_ffs_err("open fd", rvi_msg[3]); return(ERROR_TARGET); } if (rvi_msg_len != 6) { printf("error: open fd response has wrong length\n"); return(ERROR_TARGET); } *fdrtn = rvi_msg[4]; return(0); } fd_read(fd, databuf, rdsize, rdret) u_char *databuf; int fd, rdsize, *rdret; { u_char cmdpkt[6]; int rc, sz; if (rdsize > MAX_READ_DATA) { printf("error: # of bytes to read may not exceed %d\n", MAX_READ_DATA); return(ERROR_USAGE); } cmdpkt[1] = ETM_FFS2; cmdpkt[2] = TMFFS_READ; cmdpkt[3] = fd; cmdpkt[4] = rdsize; rc = etm_pkt_exch(cmdpkt, 4); if (rc) return(rc); if (rvi_msg[3]) { report_ffs_err("read fd", rvi_msg[3]); return(ERROR_TARGET); } if (rvi_msg_len < 6) { *rdret = 0; return(0); } sz = rvi_msg[4]; if (rvi_msg_len != sz + 6 || sz > rdsize) { printf("error: read fd response has wrong length\n"); return(ERROR_TARGET); } bcopy(rvi_msg + 5, databuf, sz); *rdret = sz; return(0); } fd_write(fd, data, wrsize) u_char *data; { u_char cmdpkt[MAX_PKT_TO_TARGET], *dp; int rc; if (wrsize > MAX_PKT_TO_TARGET - 6) { printf("error: fd write data fails to fit in the packet\n"); return(ERROR_USAGE); } dp = cmdpkt + 1; *dp++ = ETM_FFS2; *dp++ = TMFFS_WRITE; *dp++ = fd; *dp++ = wrsize; bcopy(data, dp, wrsize); dp += wrsize; rc = etm_pkt_exch(cmdpkt, dp - cmdpkt - 1); if (rc) return(rc); if (rvi_msg[3]) { report_ffs_err("fd write", rvi_msg[3]); return(ERROR_TARGET); } if (rvi_msg_len != 6) { printf("error: TMFFS_WRITE response has wrong length\n"); return(ERROR_TARGET); } if (rvi_msg[4] != wrsize) { printf("fd write error: # of bytes written != requested\n"); return(ERROR_TARGET); } return(0); } fd_close(fd) { u_char cmdpkt[5]; int rc; cmdpkt[1] = ETM_FFS2; cmdpkt[2] = TMFFS_CLOSE; cmdpkt[3] = fd; rc = etm_pkt_exch(cmdpkt, 3); if (rc) return(rc); if (rvi_msg[3]) { report_ffs_err("close fd", rvi_msg[3]); return(ERROR_TARGET); } if (rvi_msg_len != 5) { printf("error: close fd response has wrong length\n"); return(ERROR_TARGET); } return(0); } do_file_read(pathname, databuf, rdsize, rdret) char *pathname; u_char *databuf; int rdsize, *rdret; { u_char cmdpkt[MAX_PKT_TO_TARGET], *dp; int rc, slen, sz; slen = strlen(pathname); if (slen >= TMFFS_STRING_SIZE) { printf("error: pathname arg exceeds string length limit\n"); return(ERROR_USAGE); } if (rdsize > MAX_READ_DATA) { printf("error: # of bytes to read may not exceed %d\n", MAX_READ_DATA); return(ERROR_USAGE); } dp = cmdpkt + 1; *dp++ = ETM_FFS2; *dp++ = TMFFS_FILE_READ; *dp++ = slen + 1; strcpy(dp, pathname); dp += slen + 1; *dp++ = rdsize; rc = etm_pkt_exch(cmdpkt, dp - cmdpkt - 1); if (rc) return(rc); if (rvi_msg[3]) { report_ffs_err("read file", rvi_msg[3]); return(ERROR_TARGET); } if (rvi_msg_len < 6) { *rdret = 0; return(0); } sz = rvi_msg[4]; if (rvi_msg_len != sz + 6 || sz > rdsize) { printf("error: read file response has wrong length\n"); return(ERROR_TARGET); } bcopy(rvi_msg + 5, databuf, sz); *rdret = sz; return(0); } max_short_file_write(pathname) char *pathname; { return MAX_PKT_TO_TARGET - 3 - (strlen(pathname) + 2) - 3; } do_short_fwrite(pathname, data, datalen) char *pathname; u_char *data; { u_char cmdpkt[MAX_PKT_TO_TARGET], *dp; int rc, slen; slen = strlen(pathname); if (slen >= TMFFS_STRING_SIZE) { printf("error: pathname arg exceeds string length limit\n"); return(ERROR_USAGE); } if (datalen > max_short_file_write(pathname)) { printf("error: short write data fails to fit in the packet\n"); return(ERROR_USAGE); } dp = cmdpkt + 1; *dp++ = ETM_FFS2; *dp++ = TMFFS_FILE_WRITE; *dp++ = slen + 1; strcpy(dp, pathname); dp += slen + 1; *dp++ = datalen; bcopy(data, dp, datalen); dp += datalen; *dp++ = FFS_O_CREATE | FFS_O_TRUNC; rc = etm_pkt_exch(cmdpkt, dp - cmdpkt - 1); if (rc) return(rc); if (rvi_msg_len != 5) { printf("error: TMFFS_FILE_WRITE response has wrong length\n"); return(ERROR_TARGET); } if (rvi_msg[3]) { report_ffs_err("short file write", rvi_msg[3]); return(ERROR_TARGET); } return(0); }