FreeCalypso > hg > freecalypso-tools

annotate loadtools/secondprog.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents 064d4eedb3a6
children
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204
064d4eedb3a6 loadtools: second program invokation support added to fc-iram like in fc-xram
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1 /*
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2 * This module contains the code for passing the serial channel to a
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3 * second program, used by fc-iram and fc-xram.
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4 */
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5
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6 #include <stdio.h>
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7 #include <stdlib.h>
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8 #include <unistd.h>
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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 {
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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 }