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annotate loadtools/secondprog.c @ 248:cb1ba53a1106

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beginning of factored-out libserial
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 21 Sep 2017 21:43:34 +0000
parents 064d4eedb3a6
children
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204
064d4eedb3a6 loadtools: second program invokation support added to fc-iram like in fc-xram
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
064d4eedb3a6 loadtools: second program invokation support added to fc-iram like in fc-xram
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2 * This module contains the code for passing the serial channel to a
064d4eedb3a6 loadtools: second program invokation support added to fc-iram like in fc-xram
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3 * second program, used by fc-iram and fc-xram.
064d4eedb3a6 loadtools: second program invokation support added to fc-iram like in fc-xram
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4 */
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5
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6 #include <stdio.h>
064d4eedb3a6 loadtools: second program invokation support added to fc-iram like in fc-xram
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7 #include <stdlib.h>
064d4eedb3a6 loadtools: second program invokation support added to fc-iram like in fc-xram
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8 #include <unistd.h>
064d4eedb3a6 loadtools: second program invokation support added to fc-iram like in fc-xram
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9
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10 extern char **passon_argv;
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11 extern int passon_argc;
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12
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13 exec_2nd_prog()
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14 {
064d4eedb3a6 loadtools: second program invokation support added to fc-iram like in fc-xram
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15 char **execp_argv;
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16 char **sp, **dp;
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17 extern int target_fd;
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18 char desc_arg[16];
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19
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20 sprintf(desc_arg, "-d%d", target_fd);
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21 execp_argv = (char **) malloc(sizeof(char *) * (passon_argc + 2));
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22 if (!execp_argv) {
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23 perror("malloc argv for execvp");
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24 exit(1);
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25 }
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26 sp = passon_argv;
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27 dp = execp_argv;
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28 *dp++ = *sp++;
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29 *dp++ = desc_arg;
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30 while (*sp)
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31 *dp++ = *sp++;
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32 *dp = NULL;
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33 execvp(execp_argv[0], execp_argv);
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34 fprintf(stderr, "Unable to execvp %s\n", passon_argv[0]);
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35 exit(1);
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36 }