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annotate rvinterf/etmsync/fileio.c @ 284:7b4d4e3e610a

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fc-fsio: functions written for file descriptor open/read/close
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Fri, 28 Feb 2014 05:50:01 +0000
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children bb28ba9e82c5
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284
7b4d4e3e610a fc-fsio: functions written for file descriptor open/read/close
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1 /*
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2 * FFS2 file descriptor I/O operations
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3 */
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4
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5 #include <sys/types.h>
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6 #include <stdio.h>
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7 #include <stdlib.h>
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8 #include <string.h>
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9 #include <strings.h>
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10 #include "etm.h"
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11 #include "ffs.h"
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12 #include "tmffs2.h"
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13 #include "limits.h"
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14 #include "localtypes.h"
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15 #include "localstruct.h"
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16 #include "exitcodes.h"
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17
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18 extern u_char rvi_msg[];
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19 extern int rvi_msg_len;
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20
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21 fd_open(pathname, flags, fdrtn)
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22 char *pathname;
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23 int flags, *fdrtn;
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24 {
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25 u_char cmdpkt[MAX_PKT_TO_TARGET], *dp;
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26 int rc, slen;
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27
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28 slen = strlen(pathname);
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29 if (slen >= TMFFS_STRING_SIZE) {
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30 printf("error: pathname arg exceeds string length limit\n");
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31 return(ERROR_USAGE);
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32 }
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33 dp = cmdpkt + 1;
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34 *dp++ = ETM_FFS2;
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35 *dp++ = TMFFS_OPEN;
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36 *dp++ = slen + 1;
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37 strcpy(dp, pathname);
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38 dp += slen + 1;
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39 *dp++ = flags;
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40 rc = etm_pkt_exch(cmdpkt, dp - cmdpkt - 1);
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41 if (rc)
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42 return(rc);
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43 if (rvi_msg[3]) {
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44 printf("open fd: FFS error %d\n", rvi_msg[3]);
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45 return(ERROR_TARGET);
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46 }
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47 if (rvi_msg_len != 6) {
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48 printf("error: open fd response has wrong length\n");
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49 return(ERROR_TARGET);
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50 }
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51 *fdrtn = rvi_msg[4];
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52 return(0);
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53 }
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54
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55 fd_read(fd, databuf, rdsize, rdret)
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56 u_char *databuf;
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57 int fd, rdsize, *rdret;
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58 {
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59 u_char cmdpkt[6];
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60 int rc, sz;
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61
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62 if (rdsize > MAX_READ_DATA) {
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63 fprintf(stderr,
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64 "BUG: attempt to read more than possible per TMFFS2 protocol\n");
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65 exit(ERROR_BUG);
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66 }
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67 cmdpkt[1] = ETM_FFS2;
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68 cmdpkt[2] = TMFFS_READ;
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69 cmdpkt[3] = fd;
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70 cmdpkt[4] = rdsize;
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71 rc = etm_pkt_exch(cmdpkt, 4);
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72 if (rc)
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73 return(rc);
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74 if (rvi_msg[3]) {
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75 printf("read fd: FFS error %d\n", rvi_msg[3]);
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76 return(ERROR_TARGET);
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77 }
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78 if (rvi_msg_len < 6) {
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79 *rdret = 0;
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80 return(0);
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81 }
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82 sz = rvi_msg[4];
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83 if (rvi_msg_len != sz + 6 || sz > rdsize) {
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84 printf("error: read fd response has wrong length\n");
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85 return(ERROR_TARGET);
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86 }
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87 bcopy(rvi_msg + 5, databuf, sz);
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88 *rdret = sz;
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89 return(0);
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90 }
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91
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92 fd_close(fd)
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93 {
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94 u_char cmdpkt[5];
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95 int rc;
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96
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97 cmdpkt[1] = ETM_FFS2;
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98 cmdpkt[2] = TMFFS_CLOSE;
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99 cmdpkt[3] = fd;
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100 rc = etm_pkt_exch(cmdpkt, 3);
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101 if (rc)
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102 return(rc);
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103 if (rvi_msg[3]) {
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104 printf("close fd: FFS error %d\n", rvi_msg[3]);
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105 return(ERROR_TARGET);
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106 }
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107 if (rvi_msg_len != 5) {
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108 printf("error: close fd response has wrong length\n");
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109 return(ERROR_TARGET);
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110 }
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111 return(0);
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112 }