/*********************************************************** Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, The Netherlands. All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the names of Stichting Mathematisch Centrum or CWI or Corporation for National Research Initiatives or CNRI not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. While CWI is the initial source for this software, a modified version is made available by the Corporation for National Research Initiatives (CNRI) at the Internet address ftp://ftp.python.org. STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ******************************************************************/ /* A special version for minimal installs, where the bootstrap path is the directory in which the executable lives. Gordon McMillan, McMillan Enterprises, Inc. */ /* Return the initial module search path. */ #include "getpath.h" #include "osdefs.h" #include #include #include #include /* getenv */ #include /* sprintf */ #include /* readlink */ static char prefix[MAXPATHLEN+1]; static char *exec_prefix; static char progpath[MAXPATHLEN+1]; static char *module_search_path = NULL; static void reduce(char *dir) { int i = strlen(dir); while (i > 0 && dir[i] != SEP) --i; dir[i] = '\0'; } #ifndef S_ISREG #define S_ISREG(x) (((x) & S_IFMT) == S_IFREG) #endif #ifndef S_ISDIR #define S_ISDIR(x) (((x) & S_IFMT) == S_IFDIR) #endif #if 0 static int isfile(char *filename) { /* Is file, not directory */ struct stat buf; if (stat(filename, &buf) != 0) return 0; if (!S_ISREG(buf.st_mode)) return 0; return 1; } #endif #if 0 static int ismodule(char *filename) { /* Is module -- check for .pyc/.pyo too */ if (isfile(filename)) return 1; /* Check for the compiled version of prefix. */ if (strlen(filename) < MAXPATHLEN) { strcat(filename, Py_OptimizeFlag ? "o" : "c"); if (isfile(filename)) return 1; } return 0; } #endif static int isxfile(char *filename) { /* Is executable file */ struct stat buf; if (stat(filename, &buf) != 0) return 0; if (!S_ISREG(buf.st_mode)) return 0; if ((buf.st_mode & 0111) == 0) return 0; return 1; } #if 0 static int isdir(char *filename) { /* Is directory */ struct stat buf; if (stat(filename, &buf) != 0) return 0; if (!S_ISDIR(buf.st_mode)) return 0; return 1; } #endif static void joinpath(char *buffer, const char *stuff) { int n, k; if (stuff[0] == SEP) n = 0; else { n = strlen(buffer); if (n > 0 && buffer[n-1] != SEP && n < MAXPATHLEN) buffer[n++] = SEP; } k = strlen(stuff); if (n + k > MAXPATHLEN) k = MAXPATHLEN - n; strncpy(buffer+n, stuff, k); buffer[n+k] = '\0'; } static void calculate_path(void) { const char *prog = PI_GetProgramName(); /* use Py_SetProgramName(argv[0]) before Py_Initialize() */ char argv0_path[MAXPATHLEN+1]; char *epath; char *path = NULL; char *ppath = NULL; #if HAVE_READLINK int numchars; #endif if (strchr(prog, SEP)) strcpy(progpath, prog); else { #if HAVE_READLINK sprintf(argv0_path, "/proc/%d/exe", getpid()); numchars = readlink(argv0_path, progpath, MAXPATHLEN); if (numchars > 0) progpath[numchars] = '\0'; else { #endif epath = getenv("PATH"); if (epath) path = malloc(strlen(epath)+3); if (path) { strcpy(path, ".:"); strcat(path, epath); ppath = path; while (1) { char *delim = strchr(ppath, DELIM); if (delim) { int len = delim - ppath; strncpy(progpath, ppath, len); *(progpath + len) = '\0'; } else strcpy(progpath, ppath); joinpath(progpath, prog); if (isxfile(progpath)) break; if (!delim) { progpath[0] = '\0'; break; } ppath = delim + 1; } free(path); } else progpath[0] = '\0'; #if HAVE_READLINK } #endif } /* at this point progpath includes the executable */ strcpy(argv0_path, progpath); #if HAVE_READLINK { char tmpbuffer[MAXPATHLEN+1]; int linklen = readlink(progpath, tmpbuffer, MAXPATHLEN); while (linklen != -1) { /* It's not null terminated! */ tmpbuffer[linklen] = '\0'; if (tmpbuffer[0] == SEP) strcpy(argv0_path, tmpbuffer); else { /* Interpret relative to progpath */ reduce(argv0_path); joinpath(argv0_path, tmpbuffer); } linklen = readlink(argv0_path, tmpbuffer, MAXPATHLEN); } strcpy(progpath, argv0_path); } #endif /* HAVE_READLINK */ reduce(argv0_path); /* now argv0_path is the directory of the executable */ strcpy(prefix, argv0_path); exec_prefix = prefix; module_search_path = malloc(strlen(prefix)+1); strcpy(module_search_path, prefix); } /* External interface */ static const char *progname = "python"; void PI_SetProgramName(const char *pn) { if (pn && *pn) progname = pn; } const char * PI_GetProgramName(void) { return progname; } char * PI_GetPath(void) { if (!module_search_path) calculate_path(); return module_search_path; } char * PI_GetPrefix(void) { if (!module_search_path) calculate_path(); return prefix; } char * PI_GetExecPrefix(void) { if (!module_search_path) calculate_path(); return exec_prefix; } char * PI_GetProgramFullPath(void) { if (!module_search_path) calculate_path(); return progpath; }