FreeCalypso > hg > freecalypso-tools
annotate rvinterf/etmsync/fswrite.c @ 465:003e48f8ebe1
rvinterf/etmsync/fsnew.c: cast 0 to (char *) for execl sentinel
I generally don't use NULL and use plain 0 instead, based on a "NULL
considered harmful" discussion on the classiccmp mailing list many aeons
ago (I couldn't find it, and I reason that it must have been 2005 or
earlier), but a recent complaint by a packager sent me searching, and I
found this:
https://ewontfix.com/11/
While I don't give a @#$% about "modern" systems and code-nazi tools,
I realized that passing a plain 0 as a pointer sentinel in execl is wrong
because it will break on systems where pointers are longer than the plain
int type. Again, I don't give a @#$% about the abomination of x86_64 and
the like, but if anyone ever manages to port my code to something like a
PDP-11 (16-bit int, 32-bit long and pointers), then passing a plain 0
as a function argument where a pointer is expected most definitely won't
work: if the most natural stack slot and SP alignment unit is 16 bits,
fitting an int, with longs and pointers taking up two such slots, then
the call stack will be totally wrong with a plain 0 passed for a pointer.
Casting the 0 to (char *) ought to be the most kosher solution for the
most retro systems possible.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 11 Feb 2019 00:00:19 +0000 |
parents | 8136fb5eb292 |
children | a0754c98fc2b |
rev | line source |
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0
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1 /* |
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2 * FFS write operation commands |
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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 <ctype.h> |
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7 #include <stdio.h> |
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8 #include <stdlib.h> |
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9 #include <string.h> |
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10 #include <strings.h> |
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11 #include "etm.h" |
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12 #include "ffs.h" |
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13 #include "ffserr.h" |
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14 #include "tmffs2.h" |
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15 #include "limits.h" |
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16 #include "localtypes.h" |
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17 #include "localstruct.h" |
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18 #include "exitcodes.h" |
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19 |
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20 extern u_char rvi_msg[]; |
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21 extern int rvi_msg_len; |
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22 |
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23 cmd_mkdir(argc, argv) |
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24 char **argv; |
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25 { |
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26 return do_mkdir_existok(argv[1]); |
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27 } |
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28 |
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29 cmd_delete(argc, argv) |
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30 char **argv; |
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31 { |
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32 u_char cmdpkt[MAX_PKT_TO_TARGET], *dp; |
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33 int rc, slen; |
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34 |
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35 slen = strlen(argv[1]); |
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36 if (slen >= TMFFS_STRING_SIZE) { |
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37 printf("error: pathname arg exceeds string length limit\n"); |
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38 return(ERROR_USAGE); |
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39 } |
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40 dp = cmdpkt + 1; |
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41 *dp++ = ETM_FFS2; |
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42 *dp++ = TMFFS_REMOVE; |
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43 *dp++ = slen + 1; |
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44 strcpy(dp, argv[1]); |
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45 dp += slen + 1; |
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46 rc = etm_pkt_exch(cmdpkt, dp - cmdpkt - 1); |
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47 if (rc) |
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48 return(rc); |
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49 if (rvi_msg_len != 5) { |
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50 printf("error: TMFFS_REMOVE response has wrong length\n"); |
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51 return(ERROR_TARGET); |
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52 } |
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53 if (rvi_msg[3]) { |
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54 report_ffs_err("ffs_remove", rvi_msg[3]); |
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55 return(ERROR_TARGET); |
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56 } |
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57 return(0); |
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58 } |
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59 |
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60 hexdigit(c) |
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61 { |
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62 if (isdigit(c)) |
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63 return(c - '0'); |
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64 else if (isupper(c)) |
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65 return(c - 'A' + 10); |
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66 else |
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67 return(c - 'a' + 10); |
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68 } |
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69 |
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70 fwrite_hex_string(pathname, strarg) |
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71 char *pathname, *strarg; |
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72 { |
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73 u_char buf[256]; |
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74 int maxlen, len; |
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75 char *cp; |
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76 |
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77 maxlen = max_short_file_write(pathname); |
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78 for (cp = strarg, len = 0; ; cp += 2) { |
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79 while (isspace(*cp)) |
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80 cp++; |
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81 if (!*cp) |
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82 break; |
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83 if (!isxdigit(cp[0]) || !isxdigit(cp[1])) { |
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84 fprintf(stderr, "error: invalid hex string argument\n"); |
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85 return(ERROR_USAGE); |
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86 } |
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87 if (len >= maxlen) { |
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88 fprintf(stderr, |
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89 "error: hex string exceeds write packet limit\n"); |
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90 return(ERROR_USAGE); |
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91 } |
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92 buf[len++] = hexdigit(cp[0]) << 4 | hexdigit(cp[1]); |
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93 } |
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94 return do_short_fwrite(pathname, buf, len); |
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95 } |
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96 |
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97 fwrite_from_file(pathname, srcfile) |
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98 char *pathname, *srcfile; |
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99 { |
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100 u_char buf[240]; |
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101 FILE *srcf; |
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changeset
|
102 int rc, cc, first, tfd; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
103 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
104 srcf = fopen(srcfile, "r"); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
105 if (!srcf) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
106 perror(srcfile); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
107 return(ERROR_UNIX); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
108 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
109 for (first = 1; cc = fread(buf, 1, sizeof buf, srcf); first = 0) { |
e7502631a0f9
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
110 if (first) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
111 if (cc < sizeof buf && |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
112 cc <= max_short_file_write(pathname)) { |
e7502631a0f9
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
113 fclose(srcf); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
114 return do_short_fwrite(pathname, buf, cc); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
115 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
116 rc = fd_open(pathname, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
117 FFS_O_WRONLY | FFS_O_CREATE | FFS_O_TRUNC, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
118 &tfd); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
119 if (rc) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
120 fclose(srcf); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
121 return(rc); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
122 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
123 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
124 rc = fd_write(tfd, buf, cc); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
125 if (rc) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
126 fclose(srcf); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
127 fd_close(tfd); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
128 return(rc); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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|
129 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
130 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
131 fclose(srcf); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
132 if (first) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
133 /* 0 length file: do an open-for-write to create it */ |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
134 rc = fd_open(pathname, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
135 FFS_O_WRONLY | FFS_O_CREATE | FFS_O_TRUNC, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
136 &tfd); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
137 if (rc) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
138 return(rc); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
139 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
140 return fd_close(tfd); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
141 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
142 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
143 cmd_fwrite(argc, argv) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
144 char **argv; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
145 { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
146 if (strlen(argv[1]) >= TMFFS_STRING_SIZE) { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
147 fprintf(stderr, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
148 "error: pathname arg exceeds string length limit\n"); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
149 return(ERROR_USAGE); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
150 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
151 if (!strcmp(argv[2], "ascii")) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
152 return do_short_fwrite(argv[1], argv[3], strlen(argv[3])); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
153 else if (!strcmp(argv[2], "hex")) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
154 return fwrite_hex_string(argv[1], argv[3]); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
155 else if (!strcmp(argv[2], "file")) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
156 return fwrite_from_file(argv[1], argv[3]); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
157 else { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
158 fprintf(stderr, |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
159 "error: middle argument to fwrite cmd must be \"ascii\", \"hex\" or \"file\"\n" |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
160 ); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
161 return(ERROR_USAGE); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
162 } |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
163 } |
306
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
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|
164 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
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|
165 write_buf_to_file(pathname, data, datalen) |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
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|
166 char *pathname; |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
167 u_char *data; |
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
168 { |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
169 int tfd, rc, chunk, remain; |
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
170 |
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
171 if (datalen <= max_short_file_write(pathname)) |
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
172 return do_short_fwrite(pathname, data, datalen); |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
173 /* do it the long way */ |
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
174 rc = fd_open(pathname, FFS_O_WRONLY | FFS_O_CREATE | FFS_O_TRUNC, &tfd); |
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
175 if (rc) |
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
176 return(rc); |
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
177 for (remain = datalen; remain; remain -= chunk) { |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
178 chunk = remain; |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
179 if (chunk > 240) |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
180 chunk = 240; |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
181 rc = fd_write(tfd, data, chunk); |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
182 if (rc) { |
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
183 fd_close(tfd); |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
184 return(rc); |
8136fb5eb292
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Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
185 } |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
186 data += chunk; |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
187 } |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
188 return fd_close(tfd); |
8136fb5eb292
fc-fsio: write_buf_to_file() function made global in prep for upload-rf-table
Mychaela Falconia <falcon@freecalypso.org>
parents:
0
diff
changeset
|
189 } |