scoutos / prex-0.9.0 / usr / server / exec / exec_script.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*
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2 | * Copyright (c) 2009, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | /*
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31 | * exec_script.c - Script file loader
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32 | */
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33 | |||
34 | #include <sys/prex.h> |
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35 | #include <ipc/fs.h> |
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36 | #include <ipc/proc.h> |
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37 | #include <sys/param.h> |
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38 | |||
39 | #include <string.h> |
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40 | #include <limits.h> |
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41 | #include <stdio.h> |
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42 | #include <stdlib.h> |
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43 | #include <errno.h> |
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44 | |||
45 | #include "exec.h" |
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46 | |||
47 | static char interp[PATH_MAX]; /* interpreter name */ |
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48 | static char intarg[LINE_MAX]; /* argument to interpreter */ |
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49 | static char script[LINE_MAX]; /* script name */ |
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50 | |||
51 | /*
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52 | * Load script file
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53 | */
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54 | int
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55 | script_load(struct exec *exec)
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56 | { |
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57 | |||
58 | return 0; |
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59 | } |
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60 | |||
61 | /*
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62 | * Probe script file
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63 | */
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64 | int
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65 | script_probe(struct exec *exec)
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66 | { |
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67 | char *hdrstr = exec->header;
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68 | char *p, *name;
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69 | |||
70 | /* Check magic header */
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71 | if ((hdrstr[0] != '#') || (hdrstr[1] != '!')) |
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72 | return PROBE_ERROR;
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73 | |||
74 | /* Strip spaces before the interpriter name */
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75 | for (p = hdrstr + 2; *p == ' ' || *p == '\t'; p++) |
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76 | ; |
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77 | if (*p == '\0') |
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78 | return PROBE_ERROR;
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79 | |||
80 | DPRINTF(("script_probe: found\n"));
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81 | |||
82 | /* Pick up interpreter name */
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83 | name = p; |
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84 | for (; *p != '\0' && *p != ' ' && *p != '\t'; p++) |
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85 | ; |
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86 | *p++ = '\0';
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87 | |||
88 | if (!strncmp(name, "/bin/sh", PATH_MAX)) { |
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89 | strlcpy(interp, "/boot/cmdbox", sizeof(interp)); |
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90 | strlcpy(intarg, "sh", sizeof(intarg)); |
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91 | exec->xarg1 = intarg; |
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92 | exec->xarg2 = script; |
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93 | } else {
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94 | strlcpy(interp, name, sizeof(interp));
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95 | exec->xarg1 = intarg; |
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96 | exec->xarg2 = NULL;
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97 | } |
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98 | strlcpy(script, exec->path, sizeof(script));
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99 | exec->path = interp; |
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100 | |||
101 | DPRINTF(("script_probe: interpreter=%s arg=%s script=%s\n",
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102 | interp, intarg, script)); |
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103 | |||
104 | return PROBE_INDIRECT;
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105 | } |
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106 | |||
107 | void
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108 | script_init(void)
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109 | { |
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110 | } |