FreeCalypso > hg > freecalypso-tools
view uptools/atcmd/smsend_concat.c @ 926:6a0aa8d36d06
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 | 076d533f840d |
children |
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/* * This module contains the messy code for automatic generation and * increment of concat SMS reference numbers. */ #include <sys/types.h> #include <sys/param.h> #include <sys/file.h> #include <sys/time.h> #include <ctype.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include "../../rvinterf/include/exitcodes.h" static int initial_seed() { struct timeval tv; u_char refno, *cp, *endp; gettimeofday(&tv, 0); cp = (u_char *) &tv; endp = cp + sizeof(struct timeval); refno = 0; while (cp < endp) refno ^= *cp++; return refno; } get_concsms_refno_from_host_fs() { char *homedir, statefile[MAXPATHLEN]; int fd, cc; char buf[6]; u_char refno; homedir = getenv("HOME"); if (!homedir) { fprintf(stderr, "error: no HOME= defined, needed for concat SMS refno\n"); exit(ERROR_UNIX); } sprintf(statefile, "%s/.concat_sms_refno", homedir); fd = open(statefile, O_RDWR|O_CREAT, 0666); if (fd < 0) { perror(statefile); exit(ERROR_UNIX); } cc = read(fd, buf, 5); if (cc == 5 && buf[0] == '0' && buf[1] == 'x' && isxdigit(buf[2]) && isxdigit(buf[3]) && buf[4] == '\n') refno = strtoul(buf, 0, 16) + 1; else refno = initial_seed(); sprintf(buf, "0x%02X\n", refno); lseek(fd, 0, SEEK_SET); write(fd, buf, 5); close(fd); return refno; }