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annotate loadtools/secondprog.c @ 619:f82551c77e58

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libserial-newlnx: ASYNC_LOW_LATENCY patch reverted Reports from Das Signal indicate that loadtools performance on Debian is about the same as on Slackware, and that including or omitting the ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the patch in question does not appear to be necessary, it is being reverted until and unless someone other than Serg reports an actual real-world system on which loadtools operation times are slowed compared to the Mother's Slackware reference and on which Slackware-like performance can be restored by setting the ASYNC_LOW_LATENCY flag.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 27 Feb 2020 01:09:48 +0000
parents 064d4eedb3a6
children
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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
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.
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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 }