int main (int argc, char **argv) { program_name = argv[0]; c_stack_action (c_stack_die); return recurse ("\1"); }
int main (int argc, char **argv) { #if HAVE_SETRLIMIT && defined RLIMIT_STACK /* Before starting the endless recursion, try to be friendly to the user's machine. On some Linux 2.2.x systems, there is no stack limit for user processes at all. We don't want to kill such systems. */ struct rlimit rl; rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */ setrlimit (RLIMIT_STACK, &rl); #endif program_name = argv[0]; if (c_stack_action (0) == 0) { if (1 < argc) { exit_failure = 77; ++*argv[argc]; /* Intentionally dereference NULL. */ } return recurse (0); } fputs ("skipping test: ", stderr); perror ("c_stack_action"); return 77; }
int main (int argc, char *argv[]) { int opt; char const *prog; exit_failure = EXIT_TROUBLE; initialize_main (&argc, &argv); program_name = argv[0]; setlocale (LC_ALL, ""); bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); c_stack_action (cleanup); prog = getenv ("EDITOR"); if (prog) editor_program = prog; diffarg (DEFAULT_DIFF_PROGRAM); /* parse command line args */ while ((opt = getopt_long (argc, argv, "abBdEHiI:lo:stvw:W", longopts, 0)) != -1) { switch (opt) { case 'a': diffarg ("-a"); break; case 'b': diffarg ("-b"); break; case 'B': diffarg ("-B"); break; case 'd': diffarg ("-d"); break; case 'E': diffarg ("-E"); break; case 'H': diffarg ("-H"); break; case 'i': diffarg ("-i"); break; case 'I': diffarg ("-I"); diffarg (optarg); break; case 'l': diffarg ("--left-column"); break; case 'o': output = optarg; break; case 's': suppress_common_lines = true; break; case 't': diffarg ("-t"); break; case 'v': version_etc (stdout, "sdiff", PACKAGE_NAME, PACKAGE_VERSION, "Thomas Lord", (char *) 0); check_stdout (); return EXIT_SUCCESS; case 'w': diffarg ("-W"); diffarg (optarg); break; case 'W': diffarg ("-w"); break; case DIFF_PROGRAM_OPTION: diffargv[0] = optarg; break; case HELP_OPTION: usage (); check_stdout (); return EXIT_SUCCESS; case STRIP_TRAILING_CR_OPTION: diffarg ("--strip-trailing-cr"); break; case TABSIZE_OPTION: diffarg ("--tabsize"); diffarg (optarg); break; default: try_help (0, 0); } } if (argc - optind != 2) { if (argc - optind < 2) try_help ("missing operand after `%s'", argv[argc - 1]); else try_help ("extra operand `%s'", argv[optind + 2]); } if (! output) { /* easy case: diff does everything for us */ if (suppress_common_lines) diffarg ("--suppress-common-lines"); diffarg ("-y"); diffarg ("--"); diffarg (argv[optind]); diffarg (argv[optind + 1]); diffarg (0); execvp (diffargv[0], (char **) diffargv); perror_fatal (diffargv[0]); } else { char const *lname, *rname; FILE *left, *right, *out, *diffout; bool interact_ok; struct line_filter lfilt; struct line_filter rfilt; struct line_filter diff_filt; bool leftdir = diraccess (argv[optind]); bool rightdir = diraccess (argv[optind + 1]); if (leftdir & rightdir) fatal ("both files to be compared are directories"); lname = expand_name (argv[optind], leftdir, argv[optind + 1]); left = ck_fopen (lname, "r"); rname = expand_name (argv[optind + 1], rightdir, argv[optind]); right = ck_fopen (rname, "r"); out = ck_fopen (output, "w"); diffarg ("--sdiff-merge-assist"); diffarg ("--"); diffarg (argv[optind]); diffarg (argv[optind + 1]); diffarg (0); trapsigs (); #if ! (HAVE_WORKING_FORK || HAVE_WORKING_VFORK) { size_t cmdsize = 1; char *p, *command; int i; for (i = 0; diffargv[i]; i++) cmdsize += quote_system_arg (0, diffargv[i]) + 1; command = p = xmalloc (cmdsize); for (i = 0; diffargv[i]; i++) { p += quote_system_arg (p, diffargv[i]); *p++ = ' '; } p[-1] = 0; errno = 0; diffout = popen (command, "r"); if (! diffout) perror_fatal (command); free (command); } #else { int diff_fds[2]; # if HAVE_WORKING_VFORK sigset_t procmask; sigset_t blocked; # endif if (pipe (diff_fds) != 0) perror_fatal ("pipe"); # if HAVE_WORKING_VFORK /* Block SIGINT and SIGPIPE. */ sigemptyset (&blocked); sigaddset (&blocked, SIGINT); sigaddset (&blocked, SIGPIPE); sigprocmask (SIG_BLOCK, &blocked, &procmask); # endif diffpid = vfork (); if (diffpid < 0) perror_fatal ("fork"); if (! diffpid) { /* Alter the child's SIGINT and SIGPIPE handlers; this may munge the parent. The child ignores SIGINT in case the user interrupts the editor. The child does not ignore SIGPIPE, even if the parent does. */ if (initial_handler (handler_index_of_SIGINT) != SIG_IGN) signal_handler (SIGINT, SIG_IGN); signal_handler (SIGPIPE, SIG_DFL); # if HAVE_WORKING_VFORK /* Stop blocking SIGINT and SIGPIPE in the child. */ sigprocmask (SIG_SETMASK, &procmask, 0); # endif close (diff_fds[0]); if (diff_fds[1] != STDOUT_FILENO) { dup2 (diff_fds[1], STDOUT_FILENO); close (diff_fds[1]); } execvp (diffargv[0], (char **) diffargv); _exit (errno == ENOENT ? 127 : 126); } # if HAVE_WORKING_VFORK /* Restore the parent's SIGINT and SIGPIPE behavior. */ if (initial_handler (handler_index_of_SIGINT) != SIG_IGN) signal_handler (SIGINT, catchsig); if (initial_handler (handler_index_of_SIGPIPE) != SIG_IGN) signal_handler (SIGPIPE, catchsig); else signal_handler (SIGPIPE, SIG_IGN); /* Stop blocking SIGINT and SIGPIPE in the parent. */ sigprocmask (SIG_SETMASK, &procmask, 0); # endif close (diff_fds[1]); diffout = fdopen (diff_fds[0], "r"); if (! diffout) perror_fatal ("fdopen"); } #endif lf_init (&diff_filt, diffout); lf_init (&lfilt, left); lf_init (&rfilt, right); interact_ok = interact (&diff_filt, &lfilt, lname, &rfilt, rname, out); ck_fclose (left); ck_fclose (right); ck_fclose (out); { int wstatus; int werrno = 0; #if ! (HAVE_WORKING_FORK || HAVE_WORKING_VFORK) wstatus = pclose (diffout); if (wstatus == -1) werrno = errno; #else ck_fclose (diffout); while (waitpid (diffpid, &wstatus, 0) < 0) if (errno == EINTR) checksigs (); else perror_fatal ("waitpid"); diffpid = 0; #endif if (tmpname) { unlink (tmpname); tmpname = 0; } if (! interact_ok) exiterr (); check_child_status (werrno, wstatus, EXIT_FAILURE, diffargv[0]); untrapsig (0); checksigs (); exit (WEXITSTATUS (wstatus)); } } return EXIT_SUCCESS; /* Fool `-Wall'. */ }