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annotate rvinterf/etmsync/symlink.c @ 1023:cd6002e3aefb

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doc/Freerunner-Howto: apparently some people still use SHR, so mention it too
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Tue, 03 May 2016 13:48:39 +0000
parents e0ca3ca46a06
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Commands for experimenting with FFS symlinks
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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 "ffslimits.h"
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15 #include "localtypes.h"
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16 #include "localstruct.h"
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17 #include "exitcodes.h"
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18
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19 extern u_char rvi_msg[];
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20 extern int rvi_msg_len;
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21
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22 do_symlink(target, realobj)
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23 char *target, *realobj;
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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, targlen, reallen;
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27
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28 reallen = strlen(realobj);
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29 if (reallen >= 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 targlen = strlen(target);
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34 if (3 + (reallen+2) + (targlen+2) + 1 > MAX_PKT_TO_TARGET) {
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35 printf("error: symlink request fails to fit into packet\n");
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36 return(ERROR_USAGE);
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37 }
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38 dp = cmdpkt + 1;
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39 *dp++ = ETM_FFS2;
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40 *dp++ = TMFFS_SYMLINK;
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41 *dp++ = reallen + 1;
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42 strcpy(dp, realobj);
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43 dp += reallen + 1;
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44 *dp++ = targlen + 1;
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45 strcpy(dp, target);
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46 dp += targlen + 1;
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47 rc = etm_pkt_exch(cmdpkt, dp - cmdpkt - 1);
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48 if (rc)
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49 return(rc);
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50 if (rvi_msg_len != 5) {
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51 printf("error: TMFFS_SYMLINK response has wrong length\n");
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52 return(ERROR_TARGET);
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53 }
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54 if (rvi_msg[3]) {
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55 report_ffs_err("symlink", rvi_msg[3]);
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56 return(ERROR_TARGET);
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57 }
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58 return(0);
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59 }
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60
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61 cmd_symlink(argc, argv)
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62 char **argv;
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63 {
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64 return do_symlink(argv[1], argv[2]);
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65 }
303
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66
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67 do_readlink(pathname, databuf, rdret)
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68 char *pathname;
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69 u_char *databuf;
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70 int *rdret;
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71 {
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72 u_char cmdpkt[MAX_PKT_TO_TARGET], *dp;
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73 int rc, slen, sz;
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74
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75 slen = strlen(pathname);
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76 if (slen >= TMFFS_STRING_SIZE) {
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77 printf("error: pathname arg exceeds string length limit\n");
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78 return(ERROR_USAGE);
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79 }
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80 dp = cmdpkt + 1;
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81 *dp++ = ETM_FFS2;
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82 *dp++ = TMFFS_READLINK;
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83 *dp++ = slen + 1;
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84 strcpy(dp, pathname);
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85 dp += slen + 1;
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86 *dp++ = 0; /* dummy 2nd buffer */
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87 rc = etm_pkt_exch(cmdpkt, dp - cmdpkt - 1);
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88 if (rc)
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89 return(rc);
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90 if (rvi_msg[3]) {
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91 report_ffs_err("readlink", rvi_msg[3]);
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92 return(ERROR_TARGET);
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93 }
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94 if (rvi_msg_len < 6) {
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95 *rdret = 0;
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96 return(0);
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97 }
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98 sz = rvi_msg[4];
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99 if (rvi_msg_len != sz + 6) {
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100 printf("error: readlink response has wrong length\n");
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101 return(ERROR_TARGET);
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102 }
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103 bcopy(rvi_msg + 5, databuf, sz);
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104 *rdret = sz;
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105 return(0);
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106 }
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107
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108 cmd_readlink(argc, argv)
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109 char **argv;
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110 {
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111 u_char databuf[256];
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112 int rc, sz, off, l;
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113
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114 rc = do_readlink(argv[1], databuf, &sz);
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115 if (rc)
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116 return(rc);
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117 printf("%d bytes read\n", sz);
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118 for (off = 0; off < sz; off += 16) {
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119 l = sz - off;
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120 if (l > 16)
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121 l = 16;
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122 hexdump_line(off, databuf + off, l);
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123 }
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124 return(0);
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125 }
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126
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127 do_readlink_sancheck(pathname, databuf)
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128 char *pathname;
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129 u_char *databuf;
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130 {
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131 int rc, sz;
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132
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133 rc = do_readlink(pathname, databuf, &sz);
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134 if (rc)
e0ca3ca46a06 fc-fsio: ll reads and shows symlinks
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 303
diff changeset
135 return(rc);
e0ca3ca46a06 fc-fsio: ll reads and shows symlinks
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 303
diff changeset
136 if (sz < 2 || databuf[sz-1]) {
e0ca3ca46a06 fc-fsio: ll reads and shows symlinks
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 303
diff changeset
137 printf("error: readlink on %s returned garbage\n", pathname);
e0ca3ca46a06 fc-fsio: ll reads and shows symlinks
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 303
diff changeset
138 return(ERROR_TARGET);
e0ca3ca46a06 fc-fsio: ll reads and shows symlinks
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 303
diff changeset
139 }
e0ca3ca46a06 fc-fsio: ll reads and shows symlinks
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 303
diff changeset
140 return(0);
e0ca3ca46a06 fc-fsio: ll reads and shows symlinks
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 303
diff changeset
141 }