mirror of https://github.com/python/cpython
326 lines
8.5 KiB
C
326 lines
8.5 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Python interpreter main program */
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#include "Python.h"
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#include "osdefs.h"
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef MS_WINDOWS
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#include <fcntl.h>
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#endif
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#if defined(PYOS_OS2) || defined(MS_WINDOWS)
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#define PYTHONHOMEHELP "<prefix>\\lib"
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#else
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#define PYTHONHOMEHELP "<prefix>/python1.5"
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#endif
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/* Interface to getopt(): */
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extern int optind;
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extern char *optarg;
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extern int getopt(); /* PROTO((int, char **, char *)); -- not standardized */
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/* For Py_GetArgcArgv(); set by main() */
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static char **orig_argv;
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static int orig_argc;
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/* Short usage message (with %s for argv0) */
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static char *usage_line =
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"usage: %s [option] ... [-c cmd | file | -] [arg] ...\n";
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/* Long usage message, split into parts < 512 bytes */
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static char *usage_top = "\
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Options and arguments (and corresponding environment variables):\n\
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-d : debug output from parser (also PYTHONDEBUG=x)\n\
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-i : inspect interactively after running script, (also PYTHONINSPECT=x)\n\
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and force prompts, even if stdin does not appear to be a terminal\n\
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-O : optimize generated bytecode (a tad; also PYTHONOPTIMIZE=x)\n\
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-OO : remove doc-strings in addition to the -O optimizations\n\
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-S : don't imply 'import site' on initialization\n\
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-t : issue warnings about inconsistent tab usage (-tt: issue errors)\n\
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";
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static char *usage_mid = "\
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-u : unbuffered binary stdout and stderr (also PYTHONUNBUFFERED=x)\n\
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-U : Unicode literals: treats '...' literals like u'...'\n\
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-v : verbose (trace import statements) (also PYTHONVERBOSE=x)\n\
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-x : skip first line of source, allowing use of non-Unix forms of #!cmd\n\
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-X : disable class based built-in exceptions\n\
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-c cmd : program passed in as string (terminates option list)\n\
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file : program read from script file\n\
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- : program read from stdin (default; interactive mode if a tty)\n\
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";
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static char *usage_bot = "\
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arg ...: arguments passed to program in sys.argv[1:]\n\
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Other environment variables:\n\
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PYTHONSTARTUP: file executed on interactive startup (no default)\n\
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PYTHONPATH : '%c'-separated list of directories prefixed to the\n\
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default module search path. The result is sys.path.\n\
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PYTHONHOME : alternate <prefix> directory (or <prefix>%c<exec_prefix>).\n\
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The default module search path uses %s.\n\
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";
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/* Main program */
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DL_EXPORT(int)
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Py_Main(argc, argv)
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int argc;
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char **argv;
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{
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int c;
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int sts;
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char *command = NULL;
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char *filename = NULL;
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FILE *fp = stdin;
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char *p;
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int inspect = 0;
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int unbuffered = 0;
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int skipfirstline = 0;
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int stdin_is_interactive = 0;
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orig_argc = argc; /* For Py_GetArgcArgv() */
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orig_argv = argv;
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if ((p = getenv("PYTHONINSPECT")) && *p != '\0')
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inspect = 1;
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if ((p = getenv("PYTHONUNBUFFERED")) && *p != '\0')
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unbuffered = 1;
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while ((c = getopt(argc, argv, "c:diOStuUvxX")) != EOF) {
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if (c == 'c') {
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/* -c is the last option; following arguments
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that look like options are left for the
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the command to interpret. */
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command = malloc(strlen(optarg) + 2);
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if (command == NULL)
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Py_FatalError(
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"not enough memory to copy -c argument");
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strcpy(command, optarg);
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strcat(command, "\n");
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break;
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}
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switch (c) {
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case 'd':
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Py_DebugFlag++;
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break;
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case 'i':
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inspect++;
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Py_InteractiveFlag++;
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break;
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case 'O':
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Py_OptimizeFlag++;
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break;
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case 'S':
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Py_NoSiteFlag++;
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break;
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case 't':
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Py_TabcheckFlag++;
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break;
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case 'u':
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unbuffered++;
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break;
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case 'v':
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Py_VerboseFlag++;
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break;
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case 'x':
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skipfirstline = 1;
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break;
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case 'X':
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Py_UseClassExceptionsFlag = 0;
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break;
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case 'U':
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Py_UnicodeFlag++;
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break;
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/* This space reserved for other options */
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default:
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fprintf(stderr, usage_line, argv[0]);
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fprintf(stderr, usage_top);
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fprintf(stderr, usage_mid);
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fprintf(stderr, usage_bot,
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DELIM, DELIM, PYTHONHOMEHELP);
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exit(2);
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/*NOTREACHED*/
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}
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}
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if (command == NULL && optind < argc &&
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strcmp(argv[optind], "-") != 0)
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{
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filename = argv[optind];
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if (filename != NULL) {
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if ((fp = fopen(filename, "r")) == NULL) {
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fprintf(stderr, "%s: can't open file '%s'\n",
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argv[0], filename);
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exit(2);
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}
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else if (skipfirstline) {
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int ch;
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/* Push back first newline so line numbers
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remain the same */
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while ((ch = getc(fp)) != EOF) {
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if (ch == '\n') {
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(void)ungetc(ch, fp);
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break;
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}
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}
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}
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}
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}
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stdin_is_interactive = Py_FdIsInteractive(stdin, (char *)0);
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if (unbuffered) {
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#ifdef MS_WINDOWS
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_setmode(fileno(stdin), O_BINARY);
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_setmode(fileno(stdout), O_BINARY);
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#endif
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#ifndef MPW
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#ifdef HAVE_SETVBUF
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setvbuf(stdin, (char *)NULL, _IONBF, BUFSIZ);
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setvbuf(stdout, (char *)NULL, _IONBF, BUFSIZ);
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setvbuf(stderr, (char *)NULL, _IONBF, BUFSIZ);
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#else /* !HAVE_SETVBUF */
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setbuf(stdin, (char *)NULL);
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setbuf(stdout, (char *)NULL);
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setbuf(stderr, (char *)NULL);
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#endif /* !HAVE_SETVBUF */
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#else /* MPW */
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/* On MPW (3.2) unbuffered seems to hang */
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setvbuf(stdin, (char *)NULL, _IOLBF, BUFSIZ);
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setvbuf(stdout, (char *)NULL, _IOLBF, BUFSIZ);
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setvbuf(stderr, (char *)NULL, _IOLBF, BUFSIZ);
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#endif /* MPW */
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}
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else if (Py_InteractiveFlag) {
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#ifdef MS_WINDOWS
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/* Doesn't have to have line-buffered -- use unbuffered */
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/* Any set[v]buf(stdin, ...) screws up Tkinter :-( */
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setvbuf(stdout, (char *)NULL, _IONBF, BUFSIZ);
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#else /* !MS_WINDOWS */
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#ifdef HAVE_SETVBUF
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setvbuf(stdin, (char *)NULL, _IOLBF, BUFSIZ);
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setvbuf(stdout, (char *)NULL, _IOLBF, BUFSIZ);
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#endif /* HAVE_SETVBUF */
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#endif /* !MS_WINDOWS */
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/* Leave stderr alone - it should be unbuffered anyway. */
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}
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Py_SetProgramName(argv[0]);
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Py_Initialize();
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if (Py_VerboseFlag ||
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(command == NULL && filename == NULL && stdin_is_interactive))
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fprintf(stderr, "Python %s on %s\n%s\n",
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Py_GetVersion(), Py_GetPlatform(), Py_GetCopyright());
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if (command != NULL) {
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/* Backup optind and force sys.argv[0] = '-c' */
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optind--;
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argv[optind] = "-c";
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}
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PySys_SetArgv(argc-optind, argv+optind);
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if ((inspect || (command == NULL && filename == NULL)) &&
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isatty(fileno(stdin))) {
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PyObject *v;
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v = PyImport_ImportModule("readline");
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if (v == NULL)
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PyErr_Clear();
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else
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Py_DECREF(v);
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}
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if (command) {
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sts = PyRun_SimpleString(command) != 0;
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free(command);
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}
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else {
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if (filename == NULL && stdin_is_interactive) {
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char *startup = getenv("PYTHONSTARTUP");
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if (startup != NULL && startup[0] != '\0') {
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FILE *fp = fopen(startup, "r");
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if (fp != NULL) {
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(void) PyRun_SimpleFile(fp, startup);
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PyErr_Clear();
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fclose(fp);
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}
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}
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}
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sts = PyRun_AnyFile(
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fp,
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filename == NULL ? "<stdin>" : filename) != 0;
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if (filename != NULL)
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fclose(fp);
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}
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if (inspect && stdin_is_interactive &&
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(filename != NULL || command != NULL))
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sts = PyRun_AnyFile(stdin, "<stdin>") != 0;
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Py_Finalize();
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return sts;
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}
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/* Make the *original* argc/argv available to other modules.
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This is rare, but it is needed by the secureware extension. */
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void
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Py_GetArgcArgv(argc, argv)
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int *argc;
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char ***argv;
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{
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*argc = orig_argc;
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*argv = orig_argv;
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}
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