FreeCalypso > hg > freecalypso-tools
view loadtools/secondprog.c @ 669:ba9523ca6ed8
fc-loadtool code: preparations for e-program-* addition
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 08 Mar 2020 01:32:08 +0000 |
parents | 064d4eedb3a6 |
children |
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/* * This module contains the code for passing the serial channel to a * second program, used by fc-iram and fc-xram. */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> extern char **passon_argv; extern int passon_argc; exec_2nd_prog() { char **execp_argv; char **sp, **dp; extern int target_fd; char desc_arg[16]; sprintf(desc_arg, "-d%d", target_fd); execp_argv = (char **) malloc(sizeof(char *) * (passon_argc + 2)); if (!execp_argv) { perror("malloc argv for execvp"); exit(1); } sp = passon_argv; dp = execp_argv; *dp++ = *sp++; *dp++ = desc_arg; while (*sp) *dp++ = *sp++; *dp = NULL; execvp(execp_argv[0], execp_argv); fprintf(stderr, "Unable to execvp %s\n", passon_argv[0]); exit(1); }