Last change
on this file since 445 was 444, checked in by coas-nagasima, 4 years ago |
muslのソースコードを追加
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-
Property svn:eol-style
set to
native
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Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
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File size:
1.1 KB
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Line | |
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1 | #include <stdlib.h>
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2 | #include <string.h>
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3 | #include <unistd.h>
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4 | #include <errno.h>
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5 | #include <limits.h>
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6 | #include "libc.h"
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7 |
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8 | extern char **__environ;
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9 |
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10 | int __execvpe(const char *file, char *const argv[], char *const envp[])
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11 | {
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12 | const char *p, *z, *path = getenv("PATH");
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13 | size_t l, k;
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14 | int seen_eacces = 0;
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15 |
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16 | errno = ENOENT;
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17 | if (!*file) return -1;
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18 |
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19 | if (strchr(file, '/'))
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20 | return execve(file, argv, envp);
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21 |
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22 | if (!path) path = "/usr/local/bin:/bin:/usr/bin";
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23 | k = strnlen(file, NAME_MAX+1);
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24 | if (k > NAME_MAX) {
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25 | errno = ENAMETOOLONG;
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26 | return -1;
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27 | }
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28 | l = strnlen(path, PATH_MAX-1)+1;
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29 |
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30 | for(p=path; ; p=z) {
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31 | char b[l+k+1];
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32 | z = strchr(p, ':');
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33 | if (!z) z = p+strlen(p);
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34 | if (z-p >= l) {
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35 | if (!*z++) break;
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36 | continue;
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37 | }
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38 | memcpy(b, p, z-p);
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39 | b[z-p] = '/';
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40 | memcpy(b+(z-p)+(z>p), file, k+1);
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41 | execve(b, argv, envp);
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42 | if (errno == EACCES) seen_eacces = 1;
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43 | else if (errno != ENOENT) return -1;
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44 | if (!*z++) break;
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45 | }
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46 | if (seen_eacces) errno = EACCES;
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47 | return -1;
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48 | }
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49 |
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50 | int execvp(const char *file, char *const argv[])
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51 | {
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52 | return __execvpe(file, argv, __environ);
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53 | }
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54 |
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55 | weak_alias(__execvpe, execvpe);
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