diff options
Diffstat (limited to 'jim-exec.c')
| -rw-r--r-- | jim-exec.c | 947 |
1 files changed, 399 insertions, 548 deletions
@@ -20,7 +20,9 @@ * express or implied warranty. */ +#ifndef _GNU_SOURCE #define _GNU_SOURCE +#endif #include <string.h> #include <ctype.h> @@ -91,83 +93,24 @@ int Jim_execInit(Jim_Interp *interp) #include <errno.h> #include <signal.h> +#include "jim-signal.h" +#include "jimiocompat.h" +#include <sys/stat.h> -#if defined(__MINGW32__) - /* XXX: Should we use this implementation for cygwin too? msvc? */ - #ifndef STRICT - #define STRICT - #endif - #define WIN32_LEAN_AND_MEAN - #include <windows.h> - #include <fcntl.h> - - typedef HANDLE fdtype; - typedef HANDLE pidtype; - #define JIM_BAD_FD INVALID_HANDLE_VALUE - #define JIM_BAD_PID INVALID_HANDLE_VALUE - #define JimCloseFd CloseHandle - - #define WIFEXITED(STATUS) 1 - #define WEXITSTATUS(STATUS) (STATUS) - #define WIFSIGNALED(STATUS) 0 - #define WTERMSIG(STATUS) 0 - #define WNOHANG 1 - - static fdtype JimFileno(FILE *fh); - static pidtype JimWaitPid(pidtype pid, int *status, int nohang); - static fdtype JimDupFd(fdtype infd); - static fdtype JimOpenForRead(const char *filename); - static FILE *JimFdOpenForRead(fdtype fd); - static int JimPipe(fdtype pipefd[2]); - static pidtype JimStartWinProcess(Jim_Interp *interp, char **argv, char *env, - fdtype inputId, fdtype outputId, fdtype errorId); - static int JimErrno(void); -#else - #include "jim-signal.h" - #include <unistd.h> - #include <fcntl.h> - #include <sys/wait.h> - #include <sys/stat.h> - - typedef int fdtype; - typedef int pidtype; - #define JimPipe pipe - #define JimErrno() errno - #define JIM_BAD_FD -1 - #define JIM_BAD_PID -1 - #define JimFileno fileno - #define JimReadFd read - #define JimCloseFd close - #define JimWaitPid waitpid - #define JimDupFd dup - #define JimFdOpenForRead(FD) fdopen((FD), "r") - #define JimOpenForRead(NAME) open((NAME), O_RDONLY, 0) - - #ifndef HAVE_EXECVPE - #define execvpe(ARG0, ARGV, ENV) execvp(ARG0, ARGV) - #endif -#endif +struct WaitInfoTable; -static const char *JimStrError(void); +static char **JimOriginalEnviron(void); static char **JimSaveEnv(char **env); static void JimRestoreEnv(char **env); static int JimCreatePipeline(Jim_Interp *interp, int argc, Jim_Obj *const *argv, - pidtype **pidArrayPtr, fdtype *inPipePtr, fdtype *outPipePtr, fdtype *errFilePtr); -static void JimDetachPids(Jim_Interp *interp, int numPids, const pidtype *pidPtr); + pidtype **pidArrayPtr, int *inPipePtr, int *outPipePtr, int *errFilePtr); +static void JimDetachPids(struct WaitInfoTable *table, int numPids, const pidtype *pidPtr); static int JimCleanupChildren(Jim_Interp *interp, int numPids, pidtype *pidPtr, Jim_Obj *errStrObj); -static fdtype JimCreateTemp(Jim_Interp *interp, const char *contents, int len); -static fdtype JimOpenForWrite(const char *filename, int append); -static int JimRewindFd(fdtype fd); - -static void Jim_SetResultErrno(Jim_Interp *interp, const char *msg) -{ - Jim_SetResultFormatted(interp, "%s: %s", msg, JimStrError()); -} +static int Jim_WaitCommand(Jim_Interp *interp, int argc, Jim_Obj *const *argv); -static const char *JimStrError(void) -{ - return strerror(JimErrno()); -} +#if defined(__MINGW32__) +static pidtype JimStartWinProcess(Jim_Interp *interp, char **argv, char **env, int inputId, int outputId, int errorId); +#endif /* * If the last character of 'objPtr' is a newline, then remove @@ -188,10 +131,10 @@ static void Jim_RemoveTrailingNewline(Jim_Obj *objPtr) * Read from 'fd', append the data to strObj and close 'fd'. * Returns 1 if data was added, 0 if not, or -1 on error. */ -static int JimAppendStreamToString(Jim_Interp *interp, fdtype fd, Jim_Obj *strObj) +static int JimAppendStreamToString(Jim_Interp *interp, int fd, Jim_Obj *strObj) { char buf[256]; - FILE *fh = JimFdOpenForRead(fd); + FILE *fh = fdopen(fd, "r"); int ret = 0; if (fh == NULL) { @@ -233,7 +176,7 @@ static char **JimBuildEnv(Jim_Interp *interp) Jim_Obj *objPtr = Jim_GetGlobalVariableStr(interp, "env", JIM_NONE); if (!objPtr) { - return Jim_GetEnviron(); + return JimOriginalEnviron(); } /* We build the array as a single block consisting of the pointers followed by @@ -289,40 +232,16 @@ static void JimFreeEnv(char **env, char **original_environ) } } -#ifndef jim_ext_signal -/* Implement trivial Jim_SignalId() and Jim_SignalName(), just good enough for JimCheckWaitStatus() */ -const char *Jim_SignalId(int sig) -{ - static char buf[10]; - snprintf(buf, sizeof(buf), "%d", sig); - return buf; -} - -const char *Jim_SignalName(int sig) -{ - return Jim_SignalId(sig); -} -#endif - -/* - * Create and store an appropriate value for the global variable $::errorCode - * Based on pid and waitStatus. - * - * Returns JIM_OK for a normal exit with code 0, otherwise returns JIM_ERR. - * - * Note that $::errorCode is left unchanged for a normal exit. - * Details of any abnormal exit is appended to the errStrObj, unless it is NULL. - */ -static int JimCheckWaitStatus(Jim_Interp *interp, pidtype pid, int waitStatus, Jim_Obj *errStrObj) +static Jim_Obj *JimMakeErrorCode(Jim_Interp *interp, pidtype pid, int waitStatus, Jim_Obj *errStrObj) { - Jim_Obj *errorCode; + Jim_Obj *errorCode = Jim_NewListObj(interp, NULL, 0); - if (WIFEXITED(waitStatus) && WEXITSTATUS(waitStatus) == 0) { - return JIM_OK; + if (pid == JIM_BAD_PID || pid == JIM_NO_PID) { + Jim_ListAppendElement(interp, errorCode, Jim_NewStringObj(interp, "NONE", -1)); + Jim_ListAppendElement(interp, errorCode, Jim_NewIntObj(interp, (long)pid)); + Jim_ListAppendElement(interp, errorCode, Jim_NewIntObj(interp, -1)); } - errorCode = Jim_NewListObj(interp, NULL, 0); - - if (WIFEXITED(waitStatus)) { + else if (WIFEXITED(waitStatus)) { Jim_ListAppendElement(interp, errorCode, Jim_NewStringObj(interp, "CHILDSTATUS", -1)); Jim_ListAppendElement(interp, errorCode, Jim_NewIntObj(interp, (long)pid)); Jim_ListAppendElement(interp, errorCode, Jim_NewIntObj(interp, WEXITSTATUS(waitStatus))); @@ -330,14 +249,17 @@ static int JimCheckWaitStatus(Jim_Interp *interp, pidtype pid, int waitStatus, J else { const char *type; const char *action; + const char *signame; if (WIFSIGNALED(waitStatus)) { type = "CHILDKILLED"; action = "killed"; + signame = Jim_SignalId(WTERMSIG(waitStatus)); } else { type = "CHILDSUSP"; action = "suspended"; + signame = "none"; } Jim_ListAppendElement(interp, errorCode, Jim_NewStringObj(interp, type, -1)); @@ -350,17 +272,33 @@ static int JimCheckWaitStatus(Jim_Interp *interp, pidtype pid, int waitStatus, J } Jim_ListAppendElement(interp, errorCode, Jim_NewIntObj(interp, (long)pid)); - Jim_ListAppendElement(interp, errorCode, Jim_NewStringObj(interp, Jim_SignalId(WTERMSIG(waitStatus)), -1)); - Jim_ListAppendElement(interp, errorCode, Jim_NewStringObj(interp, Jim_SignalName(WTERMSIG(waitStatus)), -1)); + Jim_ListAppendElement(interp, errorCode, Jim_NewStringObj(interp, signame, -1)); + } + return errorCode; +} + +/* + * Create and store an appropriate value for the global variable $::errorCode + * Based on pid and waitStatus. + * + * Returns JIM_OK for a normal exit with code 0, otherwise returns JIM_ERR. + * + * Note that $::errorCode is left unchanged for a normal exit. + * Details of any abnormal exit is appended to the errStrObj, unless it is NULL. + */ +static int JimCheckWaitStatus(Jim_Interp *interp, pidtype pid, int waitStatus, Jim_Obj *errStrObj) +{ + if (WIFEXITED(waitStatus) && WEXITSTATUS(waitStatus) == 0) { + return JIM_OK; } - Jim_SetGlobalVariableStr(interp, "errorCode", errorCode); + Jim_SetGlobalVariableStr(interp, "errorCode", JimMakeErrorCode(interp, pid, waitStatus, errStrObj)); return JIM_ERR; } /* - * Data structures of the following type are used by JimFork and - * JimWaitPids to keep track of child processes. + * Data structures of the following type are used by exec and + * wait to keep track of child processes. */ struct WaitInfo @@ -370,10 +308,12 @@ struct WaitInfo int flags; /* Various flag bits; see below for definitions. */ }; +/* This table is shared by exec and wait */ struct WaitInfoTable { struct WaitInfo *info; /* Table of outstanding processes */ int size; /* Size of the allocated table */ int used; /* Number of entries in use */ + int refcount; /* Free the table once the refcount drops to 0 */ }; /* @@ -392,8 +332,10 @@ static void JimFreeWaitInfoTable(struct Jim_Interp *interp, void *privData) { struct WaitInfoTable *table = privData; - Jim_Free(table->info); - Jim_Free(table); + if (--table->refcount == 0) { + Jim_Free(table->info); + Jim_Free(table); + } } static struct WaitInfoTable *JimAllocWaitInfoTable(void) @@ -401,22 +343,46 @@ static struct WaitInfoTable *JimAllocWaitInfoTable(void) struct WaitInfoTable *table = Jim_Alloc(sizeof(*table)); table->info = NULL; table->size = table->used = 0; + table->refcount = 1; return table; } +/** + * Removes the given pid from the wait table. + * + * Returns 0 if OK or -1 if not found. + */ +static int JimWaitRemove(struct WaitInfoTable *table, pidtype pid) +{ + int i; + + /* Find it in the table */ + for (i = 0; i < table->used; i++) { + if (pid == table->info[i].pid) { + if (i != table->used - 1) { + table->info[i] = table->info[table->used - 1]; + } + table->used--; + return 0; + } + } + return -1; +} + /* * The main [exec] command */ static int Jim_ExecCmd(Jim_Interp *interp, int argc, Jim_Obj *const *argv) { - fdtype outputId; /* File id for output pipe. -1 means command overrode. */ - fdtype errorId; /* File id for temporary file containing error output. */ + int outputId; /* File id for output pipe. -1 means command overrode. */ + int errorId; /* File id for temporary file containing error output. */ pidtype *pidPtr; int numPids, result; int child_siginfo = 1; Jim_Obj *childErrObj; Jim_Obj *errStrObj; + struct WaitInfoTable *table = Jim_CmdPrivData(interp); /* * See if the command is to be run in the background; if so, create @@ -437,7 +403,7 @@ static int Jim_ExecCmd(Jim_Interp *interp, int argc, Jim_Obj *const *argv) Jim_ListAppendElement(interp, listObj, Jim_NewIntObj(interp, (long)pidPtr[i])); } Jim_SetResult(interp, listObj); - JimDetachPids(interp, numPids, pidPtr); + JimDetachPids(table, numPids, pidPtr); Jim_Free(pidPtr); return JIM_OK; } @@ -457,7 +423,7 @@ static int Jim_ExecCmd(Jim_Interp *interp, int argc, Jim_Obj *const *argv) errStrObj = Jim_NewStringObj(interp, "", 0); /* Read from the output pipe until EOF */ - if (outputId != JIM_BAD_FD) { + if (outputId != -1) { if (JimAppendStreamToString(interp, outputId, errStrObj) < 0) { result = JIM_ERR; Jim_SetResultErrno(interp, "error reading from output pipe"); @@ -478,9 +444,9 @@ static int Jim_ExecCmd(Jim_Interp *interp, int argc, Jim_Obj *const *argv) * Note that unlike Tcl, the presence of stderr output does not cause * exec to return an error. */ - if (errorId != JIM_BAD_FD) { + if (errorId != -1) { int ret; - JimRewindFd(errorId); + lseek(errorId, 0, SEEK_SET); ret = JimAppendStreamToString(interp, errorId, errStrObj); if (ret < 0) { Jim_SetResultErrno(interp, "error reading from error pipe"); @@ -507,6 +473,65 @@ static int Jim_ExecCmd(Jim_Interp *interp, int argc, Jim_Obj *const *argv) return result; } +/** + * Does waitpid() on the given pid, and then removes the + * entry from the wait table. + * + * Returns the pid if OK and updates *statusPtr with the status, + * or JIM_BAD_PID if the pid was not in the table. + */ +static pidtype JimWaitForProcess(struct WaitInfoTable *table, pidtype pid, int *statusPtr) +{ + if (JimWaitRemove(table, pid) == 0) { + /* wait for it */ + waitpid(pid, statusPtr, 0); + return pid; + } + + /* Not found */ + return JIM_BAD_PID; +} + +/** + * Indicates that one or more child processes have been placed in + * background and are no longer cared about. + * These children can be cleaned up with JimReapDetachedPids(). + */ +static void JimDetachPids(struct WaitInfoTable *table, int numPids, const pidtype *pidPtr) +{ + int j; + + for (j = 0; j < numPids; j++) { + /* Find it in the table */ + int i; + for (i = 0; i < table->used; i++) { + if (pidPtr[j] == table->info[i].pid) { + table->info[i].flags |= WI_DETACHED; + break; + } + } + } +} + +/* Use 'name getfd' to get the file descriptor associated with channel 'name' + * Returns the file descriptor or -1 on error + */ +static int JimGetChannelFd(Jim_Interp *interp, const char *name) +{ + Jim_Obj *objv[2]; + + objv[0] = Jim_NewStringObj(interp, name, -1); + objv[1] = Jim_NewStringObj(interp, "getfd", -1); + + if (Jim_EvalObjVector(interp, 2, objv) == JIM_OK) { + jim_wide fd; + if (Jim_GetWide(interp, Jim_GetResult(interp), &fd) == JIM_OK) { + return fd; + } + } + return -1; +} + static void JimReapDetachedPids(struct WaitInfoTable *table) { struct WaitInfo *waitPtr; @@ -522,7 +547,7 @@ static void JimReapDetachedPids(struct WaitInfoTable *table) for (count = table->used; count > 0; waitPtr++, count--) { if (waitPtr->flags & WI_DETACHED) { int status; - pidtype pid = JimWaitPid(waitPtr->pid, &status, WNOHANG); + pidtype pid = waitpid(waitPtr->pid, &status, WNOHANG); if (pid == waitPtr->pid) { /* Process has exited, so remove it from the table */ table->used--; @@ -536,69 +561,78 @@ static void JimReapDetachedPids(struct WaitInfoTable *table) } } -/** - * Does waitpid() on the given pid, and then removes the - * entry from the wait table. +/* + * wait ?-nohang? ?pid? * - * Returns the pid if OK and updates *statusPtr with the status, - * or JIM_BAD_PID if the pid was not in the table. + * An interface to waitpid(2) + * + * Returns a 3 element list. + * + * If the process has not exited or doesn't exist, returns: + * + * {NONE x x} + * + * If the process exited normally, returns: + * + * {CHILDSTATUS <pid> <exit-status>} + * + * If the process terminated on a signal, returns: + * + * {CHILDKILLED <pid> <signal>} + * + * Otherwise (core dump, stopped, continued, ...), returns: + * + * {CHILDSUSP <pid> none} + * + * With no arguments, reaps any finished background processes started by exec ... & */ -static pidtype JimWaitForProcess(struct WaitInfoTable *table, pidtype pid, int *statusPtr) +static int Jim_WaitCommand(Jim_Interp *interp, int argc, Jim_Obj *const *argv) { - int i; + struct WaitInfoTable *table = Jim_CmdPrivData(interp); + int nohang = 0; + pidtype pid; + long pidarg; + int status; + Jim_Obj *errCodeObj; - /* Find it in the table */ - for (i = 0; i < table->used; i++) { - if (pid == table->info[i].pid) { - /* wait for it */ - JimWaitPid(pid, statusPtr, 0); + /* With no arguments, reap detached children */ + if (argc == 1) { + JimReapDetachedPids(table); + return JIM_OK; + } - /* Remove it from the table */ - if (i != table->used - 1) { - table->info[i] = table->info[table->used - 1]; - } - table->used--; - return pid; - } + if (argc > 1 && Jim_CompareStringImmediate(interp, argv[1], "-nohang")) { + nohang = 1; + } + if (argc != nohang + 2) { + Jim_WrongNumArgs(interp, 1, argv, "?-nohang? ?pid?"); + return JIM_ERR; + } + if (Jim_GetLong(interp, argv[nohang + 1], &pidarg) != JIM_OK) { + return JIM_ERR; } - /* Not found */ - return JIM_BAD_PID; -} + pid = waitpid((pidtype)pidarg, &status, nohang ? WNOHANG : 0); -/** - * Indicates that one or more child processes have been placed in - * background and are no longer cared about. - * These children can be cleaned up with JimReapDetachedPids(). - */ -static void JimDetachPids(Jim_Interp *interp, int numPids, const pidtype *pidPtr) -{ - int j; - struct WaitInfoTable *table = Jim_CmdPrivData(interp); + errCodeObj = JimMakeErrorCode(interp, pid, status, NULL); - for (j = 0; j < numPids; j++) { - /* Find it in the table */ - int i; - for (i = 0; i < table->used; i++) { - if (pidPtr[j] == table->info[i].pid) { - table->info[i].flags |= WI_DETACHED; - break; - } - } + if (pid != JIM_BAD_PID && (WIFEXITED(status) || WIFSIGNALED(status))) { + /* The process has finished. Remove it from the wait table if it exists there */ + JimWaitRemove(table, pid); } + Jim_SetResult(interp, errCodeObj); + return JIM_OK; } -static FILE *JimGetAioFilehandle(Jim_Interp *interp, const char *name) +static int Jim_PidCommand(Jim_Interp *interp, int argc, Jim_Obj *const *argv) { - FILE *fh; - Jim_Obj *fhObj; - - fhObj = Jim_NewStringObj(interp, name, -1); - Jim_IncrRefCount(fhObj); - fh = Jim_AioFilehandle(interp, fhObj); - Jim_DecrRefCount(interp, fhObj); + if (argc != 1) { + Jim_WrongNumArgs(interp, 1, argv, ""); + return JIM_ERR; + } - return fh; + Jim_SetResultInt(interp, (jim_wide)getpid()); + return JIM_OK; } /* @@ -631,7 +665,7 @@ static FILE *JimGetAioFilehandle(Jim_Interp *interp, const char *name) */ static int JimCreatePipeline(Jim_Interp *interp, int argc, Jim_Obj *const *argv, pidtype **pidArrayPtr, - fdtype *inPipePtr, fdtype *outPipePtr, fdtype *errFilePtr) + int *inPipePtr, int *outPipePtr, int *errFilePtr) { pidtype *pidPtr = NULL; /* Points to malloc-ed array holding all * the pids of child processes. */ @@ -668,47 +702,48 @@ JimCreatePipeline(Jim_Interp *interp, int argc, Jim_Obj *const *argv, pidtype ** * or NULL if output goes to stdout/pipe. */ const char *error = NULL; /* Holds name of stderr file to pipe to, * or NULL if stderr goes to stderr/pipe. */ - fdtype inputId = JIM_BAD_FD; + int inputId = -1; /* Readable file id input to current command in - * pipeline (could be file or pipe). JIM_BAD_FD + * pipeline (could be file or pipe). -1 * means use stdin. */ - fdtype outputId = JIM_BAD_FD; + int outputId = -1; /* Writable file id for output from current * command in pipeline (could be file or pipe). - * JIM_BAD_FD means use stdout. */ - fdtype errorId = JIM_BAD_FD; + * -1 means use stdout. */ + int errorId = -1; /* Writable file id for all standard error - * output from all commands in pipeline. JIM_BAD_FD + * output from all commands in pipeline. -1 * means use stderr. */ - fdtype lastOutputId = JIM_BAD_FD; + int lastOutputId = -1; /* Write file id for output from last command * in pipeline (could be file or pipe). * -1 means use stdout. */ - fdtype pipeIds[2]; /* File ids for pipe that's being created. */ + int pipeIds[2]; /* File ids for pipe that's being created. */ int firstArg, lastArg; /* Indexes of first and last arguments in * current command. */ int lastBar; int i; pidtype pid; char **save_environ; +#ifndef __MINGW32__ + char **child_environ; +#endif struct WaitInfoTable *table = Jim_CmdPrivData(interp); /* Holds the args which will be used to exec */ char **arg_array = Jim_Alloc(sizeof(*arg_array) * (argc + 1)); int arg_count = 0; - JimReapDetachedPids(table); - if (inPipePtr != NULL) { - *inPipePtr = JIM_BAD_FD; + *inPipePtr = -1; } if (outPipePtr != NULL) { - *outPipePtr = JIM_BAD_FD; + *outPipePtr = -1; } if (errFilePtr != NULL) { - *errFilePtr = JIM_BAD_FD; + *errFilePtr = -1; } - pipeIds[0] = pipeIds[1] = JIM_BAD_FD; + pipeIds[0] = pipeIds[1] = -1; /* * First, scan through all the arguments to figure out the structure @@ -822,39 +857,44 @@ badargs: * Immediate data in command. Create temporary file and * put data into file. */ - inputId = JimCreateTemp(interp, input, input_len); - if (inputId == JIM_BAD_FD) { + inputId = Jim_MakeTempFile(interp, NULL, 1); + if (inputId == -1) { + goto error; + } + if (write(inputId, input, input_len) != input_len) { + Jim_SetResultErrno(interp, "couldn't write temp file"); + close(inputId); goto error; } + lseek(inputId, 0L, SEEK_SET); } else if (inputFile == FILE_HANDLE) { - /* Should be a file descriptor */ - FILE *fh = JimGetAioFilehandle(interp, input); + int fd = JimGetChannelFd(interp, input); - if (fh == NULL) { + if (fd < 0) { goto error; } - inputId = JimDupFd(JimFileno(fh)); + inputId = dup(fd); } else { /* * File redirection. Just open the file. */ - inputId = JimOpenForRead(input); - if (inputId == JIM_BAD_FD) { - Jim_SetResultFormatted(interp, "couldn't read file \"%s\": %s", input, JimStrError()); + inputId = Jim_OpenForRead(input); + if (inputId == -1) { + Jim_SetResultFormatted(interp, "couldn't read file \"%s\": %s", input, strerror(Jim_Errno())); goto error; } } } else if (inPipePtr != NULL) { - if (JimPipe(pipeIds) != 0) { + if (pipe(pipeIds) != 0) { Jim_SetResultErrno(interp, "couldn't create input pipe for command"); goto error; } inputId = pipeIds[0]; *inPipePtr = pipeIds[1]; - pipeIds[0] = pipeIds[1] = JIM_BAD_FD; + pipeIds[0] = pipeIds[1] = -1; } /* @@ -863,20 +903,19 @@ badargs: */ if (output != NULL) { if (outputFile == FILE_HANDLE) { - FILE *fh = JimGetAioFilehandle(interp, output); - if (fh == NULL) { + int fd = JimGetChannelFd(interp, output); + if (fd < 0) { goto error; } - fflush(fh); - lastOutputId = JimDupFd(JimFileno(fh)); + lastOutputId = dup(fd); } else { /* * Output is to go to a file. */ - lastOutputId = JimOpenForWrite(output, outputFile == FILE_APPEND); - if (lastOutputId == JIM_BAD_FD) { - Jim_SetResultFormatted(interp, "couldn't write file \"%s\": %s", output, JimStrError()); + lastOutputId = Jim_OpenForWrite(output, outputFile == FILE_APPEND); + if (lastOutputId == -1) { + Jim_SetResultFormatted(interp, "couldn't write file \"%s\": %s", output, strerror(Jim_Errno())); goto error; } } @@ -885,43 +924,42 @@ badargs: /* * Output is to go to a pipe. */ - if (JimPipe(pipeIds) != 0) { + if (pipe(pipeIds) != 0) { Jim_SetResultErrno(interp, "couldn't create output pipe"); goto error; } lastOutputId = pipeIds[1]; *outPipePtr = pipeIds[0]; - pipeIds[0] = pipeIds[1] = JIM_BAD_FD; + pipeIds[0] = pipeIds[1] = -1; } /* If we are redirecting stderr with 2>filename or 2>@fileId, then we ignore errFilePtr */ if (error != NULL) { if (errorFile == FILE_HANDLE) { if (strcmp(error, "1") == 0) { /* Special 2>@1 */ - if (lastOutputId != JIM_BAD_FD) { - errorId = JimDupFd(lastOutputId); + if (lastOutputId != -1) { + errorId = dup(lastOutputId); } else { /* No redirection of stdout, so just use 2>@stdout */ error = "stdout"; } } - if (errorId == JIM_BAD_FD) { - FILE *fh = JimGetAioFilehandle(interp, error); - if (fh == NULL) { + if (errorId == -1) { + int fd = JimGetChannelFd(interp, error); + if (fd < 0) { goto error; } - fflush(fh); - errorId = JimDupFd(JimFileno(fh)); + errorId = dup(fd); } } else { /* * Output is to go to a file. */ - errorId = JimOpenForWrite(error, errorFile == FILE_APPEND); - if (errorId == JIM_BAD_FD) { - Jim_SetResultFormatted(interp, "couldn't write file \"%s\": %s", error, JimStrError()); + errorId = Jim_OpenForWrite(error, errorFile == FILE_APPEND); + if (errorId == -1) { + Jim_SetResultFormatted(interp, "couldn't write file \"%s\": %s", error, strerror(Jim_Errno())); goto error; } } @@ -935,11 +973,11 @@ badargs: * to complete before reading stderr, and processes couldn't complete * because stderr was backed up. */ - errorId = JimCreateTemp(interp, NULL, 0); - if (errorId == JIM_BAD_FD) { + errorId = Jim_MakeTempFile(interp, NULL, 1); + if (errorId == -1) { goto error; } - *errFilePtr = JimDupFd(errorId); + *errFilePtr = dup(errorId); } /* @@ -953,30 +991,38 @@ badargs: } for (firstArg = 0; firstArg < arg_count; numPids++, firstArg = lastArg + 1) { int pipe_dup_err = 0; - fdtype origErrorId = errorId; + int origErrorId = errorId; for (lastArg = firstArg; lastArg < arg_count; lastArg++) { - if (arg_array[lastArg][0] == '|') { - if (arg_array[lastArg][1] == '&') { - pipe_dup_err = 1; - } + if (strcmp(arg_array[lastArg], "|") == 0) { + break; + } + if (strcmp(arg_array[lastArg], "|&") == 0) { + pipe_dup_err = 1; break; } } + + if (lastArg == firstArg) { + Jim_SetResultString(interp, "missing command to exec", -1); + goto error; + } + /* Replace | with NULL for execv() */ arg_array[lastArg] = NULL; if (lastArg == arg_count) { outputId = lastOutputId; + lastOutputId = -1; } else { - if (JimPipe(pipeIds) != 0) { + if (pipe(pipeIds) != 0) { Jim_SetResultErrno(interp, "couldn't create pipe"); goto error; } outputId = pipeIds[1]; } - /* Need to do this befor vfork() */ + /* Need to do this before vfork() */ if (pipe_dup_err) { errorId = outputId; } @@ -984,14 +1030,17 @@ badargs: /* Now fork the child */ #ifdef __MINGW32__ - pid = JimStartWinProcess(interp, &arg_array[firstArg], save_environ ? save_environ[0] : NULL, inputId, outputId, errorId); + pid = JimStartWinProcess(interp, &arg_array[firstArg], save_environ, inputId, outputId, errorId); if (pid == JIM_BAD_PID) { Jim_SetResultFormatted(interp, "couldn't exec \"%s\"", arg_array[firstArg]); goto error; } #else + i = strlen(arg_array[firstArg]); + + child_environ = Jim_GetEnviron(); /* - * Make a new process and enter it into the table if the fork + * Make a new process and enter it into the table if the vfork * is successful. */ pid = vfork(); @@ -1001,22 +1050,49 @@ badargs: } if (pid == 0) { /* Child */ - - if (inputId != -1) dup2(inputId, 0); - if (outputId != -1) dup2(outputId, 1); - if (errorId != -1) dup2(errorId, 2); - - for (i = 3; (i <= outputId) || (i <= inputId) || (i <= errorId); i++) { - close(i); + /* Set up stdin, stdout, stderr */ + if (inputId != -1) { + dup2(inputId, fileno(stdin)); + close(inputId); + } + if (outputId != -1) { + dup2(outputId, fileno(stdout)); + if (outputId != errorId) { + close(outputId); + } + } + if (errorId != -1) { + dup2(errorId, fileno(stderr)); + close(errorId); + } + /* Close parent-only file descriptors */ + if (outPipePtr) { + close(*outPipePtr); + } + if (errFilePtr) { + close(*errFilePtr); + } + if (pipeIds[0] != -1) { + close(pipeIds[0]); + } + if (lastOutputId != -1) { + close(lastOutputId); } - /* Restore SIGPIPE behaviour */ - (void)signal(SIGPIPE, SIG_DFL); - - execvpe(arg_array[firstArg], &arg_array[firstArg], Jim_GetEnviron()); + execvpe(arg_array[firstArg], &arg_array[firstArg], child_environ); - /* Need to prep an error message before vfork(), just in case */ - fprintf(stderr, "couldn't exec \"%s\"\n", arg_array[firstArg]); + if (write(fileno(stderr), "couldn't exec \"", 15) && + write(fileno(stderr), arg_array[firstArg], i) && + write(fileno(stderr), "\"\n", 2)) { + /* nothing */ + } +#ifdef JIM_MAINTAINER + { + /* Keep valgrind happy */ + static char *const false_argv[2] = {"false", NULL}; + execvp(false_argv[0],false_argv); + } +#endif _exit(127); } #endif @@ -1046,14 +1122,14 @@ badargs: * this child, then set up the input for the next child. */ - if (inputId != JIM_BAD_FD) { - JimCloseFd(inputId); + if (inputId != -1) { + close(inputId); } - if (outputId != JIM_BAD_FD) { - JimCloseFd(outputId); + if (outputId != -1) { + close(outputId); } inputId = pipeIds[0]; - pipeIds[0] = pipeIds[1] = JIM_BAD_FD; + pipeIds[0] = pipeIds[1] = -1; } *pidArrayPtr = pidPtr; @@ -1062,14 +1138,14 @@ badargs: */ cleanup: - if (inputId != JIM_BAD_FD) { - JimCloseFd(inputId); + if (inputId != -1) { + close(inputId); } - if (lastOutputId != JIM_BAD_FD) { - JimCloseFd(lastOutputId); + if (lastOutputId != -1) { + close(lastOutputId); } - if (errorId != JIM_BAD_FD) { - JimCloseFd(errorId); + if (errorId != -1) { + close(errorId); } Jim_Free(arg_array); @@ -1084,28 +1160,28 @@ badargs: */ error: - if ((inPipePtr != NULL) && (*inPipePtr != JIM_BAD_FD)) { - JimCloseFd(*inPipePtr); - *inPipePtr = JIM_BAD_FD; + if ((inPipePtr != NULL) && (*inPipePtr != -1)) { + close(*inPipePtr); + *inPipePtr = -1; } - if ((outPipePtr != NULL) && (*outPipePtr != JIM_BAD_FD)) { - JimCloseFd(*outPipePtr); - *outPipePtr = JIM_BAD_FD; + if ((outPipePtr != NULL) && (*outPipePtr != -1)) { + close(*outPipePtr); + *outPipePtr = -1; } - if ((errFilePtr != NULL) && (*errFilePtr != JIM_BAD_FD)) { - JimCloseFd(*errFilePtr); - *errFilePtr = JIM_BAD_FD; + if ((errFilePtr != NULL) && (*errFilePtr != -1)) { + close(*errFilePtr); + *errFilePtr = -1; } - if (pipeIds[0] != JIM_BAD_FD) { - JimCloseFd(pipeIds[0]); + if (pipeIds[0] != -1) { + close(pipeIds[0]); } - if (pipeIds[1] != JIM_BAD_FD) { - JimCloseFd(pipeIds[1]); + if (pipeIds[1] != -1) { + close(pipeIds[1]); } if (pidPtr != NULL) { for (i = 0; i < numPids; i++) { if (pidPtr[i] != JIM_BAD_PID) { - JimDetachPids(interp, 1, &pidPtr[i]); + JimDetachPids(table, 1, &pidPtr[i]); } } Jim_Free(pidPtr); @@ -1156,244 +1232,22 @@ static int JimCleanupChildren(Jim_Interp *interp, int numPids, pidtype *pidPtr, int Jim_execInit(Jim_Interp *interp) { + struct WaitInfoTable *waitinfo; if (Jim_PackageProvide(interp, "exec", "1.0", JIM_ERRMSG)) return JIM_ERR; -#ifdef SIGPIPE - /* - * Disable SIGPIPE signals: if they were allowed, this process - * might go away unexpectedly if children misbehave. This code - * can potentially interfere with other application code that - * expects to handle SIGPIPEs. - * - * By doing this in the init function, applications can override - * this later. Note that child processes have SIGPIPE restored - * to the default after vfork(). - */ - (void)signal(SIGPIPE, SIG_IGN); -#endif + waitinfo = JimAllocWaitInfoTable(); + Jim_CreateCommand(interp, "exec", Jim_ExecCmd, waitinfo, JimFreeWaitInfoTable); + waitinfo->refcount++; + Jim_CreateCommand(interp, "wait", Jim_WaitCommand, waitinfo, JimFreeWaitInfoTable); + Jim_CreateCommand(interp, "pid", Jim_PidCommand, 0, 0); - Jim_CreateCommand(interp, "exec", Jim_ExecCmd, JimAllocWaitInfoTable(), JimFreeWaitInfoTable); return JIM_OK; } #if defined(__MINGW32__) /* Windows-specific (mingw) implementation */ -static SECURITY_ATTRIBUTES *JimStdSecAttrs(void) -{ - static SECURITY_ATTRIBUTES secAtts; - - secAtts.nLength = sizeof(SECURITY_ATTRIBUTES); - secAtts.lpSecurityDescriptor = NULL; - secAtts.bInheritHandle = TRUE; - return &secAtts; -} - -static int JimErrno(void) -{ - switch (GetLastError()) { - case ERROR_FILE_NOT_FOUND: return ENOENT; - case ERROR_PATH_NOT_FOUND: return ENOENT; - case ERROR_TOO_MANY_OPEN_FILES: return EMFILE; - case ERROR_ACCESS_DENIED: return EACCES; - case ERROR_INVALID_HANDLE: return EBADF; - case ERROR_BAD_ENVIRONMENT: return E2BIG; - case ERROR_BAD_FORMAT: return ENOEXEC; - case ERROR_INVALID_ACCESS: return EACCES; - case ERROR_INVALID_DRIVE: return ENOENT; - case ERROR_CURRENT_DIRECTORY: return EACCES; - case ERROR_NOT_SAME_DEVICE: return EXDEV; - case ERROR_NO_MORE_FILES: return ENOENT; - case ERROR_WRITE_PROTECT: return EROFS; - case ERROR_BAD_UNIT: return ENXIO; - case ERROR_NOT_READY: return EBUSY; - case ERROR_BAD_COMMAND: return EIO; - case ERROR_CRC: return EIO; - case ERROR_BAD_LENGTH: return EIO; - case ERROR_SEEK: return EIO; - case ERROR_WRITE_FAULT: return EIO; - case ERROR_READ_FAULT: return EIO; - case ERROR_GEN_FAILURE: return EIO; - case ERROR_SHARING_VIOLATION: return EACCES; - case ERROR_LOCK_VIOLATION: return EACCES; - case ERROR_SHARING_BUFFER_EXCEEDED: return ENFILE; - case ERROR_HANDLE_DISK_FULL: return ENOSPC; - case ERROR_NOT_SUPPORTED: return ENODEV; - case ERROR_REM_NOT_LIST: return EBUSY; - case ERROR_DUP_NAME: return EEXIST; - case ERROR_BAD_NETPATH: return ENOENT; - case ERROR_NETWORK_BUSY: return EBUSY; - case ERROR_DEV_NOT_EXIST: return ENODEV; - case ERROR_TOO_MANY_CMDS: return EAGAIN; - case ERROR_ADAP_HDW_ERR: return EIO; - case ERROR_BAD_NET_RESP: return EIO; - case ERROR_UNEXP_NET_ERR: return EIO; - case ERROR_NETNAME_DELETED: return ENOENT; - case ERROR_NETWORK_ACCESS_DENIED: return EACCES; - case ERROR_BAD_DEV_TYPE: return ENODEV; - case ERROR_BAD_NET_NAME: return ENOENT; - case ERROR_TOO_MANY_NAMES: return ENFILE; - case ERROR_TOO_MANY_SESS: return EIO; - case ERROR_SHARING_PAUSED: return EAGAIN; - case ERROR_REDIR_PAUSED: return EAGAIN; - case ERROR_FILE_EXISTS: return EEXIST; - case ERROR_CANNOT_MAKE: return ENOSPC; - case ERROR_OUT_OF_STRUCTURES: return ENFILE; - case ERROR_ALREADY_ASSIGNED: return EEXIST; - case ERROR_INVALID_PASSWORD: return EPERM; - case ERROR_NET_WRITE_FAULT: return EIO; - case ERROR_NO_PROC_SLOTS: return EAGAIN; - case ERROR_DISK_CHANGE: return EXDEV; - case ERROR_BROKEN_PIPE: return EPIPE; - case ERROR_OPEN_FAILED: return ENOENT; - case ERROR_DISK_FULL: return ENOSPC; - case ERROR_NO_MORE_SEARCH_HANDLES: return EMFILE; - case ERROR_INVALID_TARGET_HANDLE: return EBADF; - case ERROR_INVALID_NAME: return ENOENT; - case ERROR_PROC_NOT_FOUND: return ESRCH; - case ERROR_WAIT_NO_CHILDREN: return ECHILD; - case ERROR_CHILD_NOT_COMPLETE: return ECHILD; - case ERROR_DIRECT_ACCESS_HANDLE: return EBADF; - case ERROR_SEEK_ON_DEVICE: return ESPIPE; - case ERROR_BUSY_DRIVE: return EAGAIN; - case ERROR_DIR_NOT_EMPTY: return EEXIST; - case ERROR_NOT_LOCKED: return EACCES; - case ERROR_BAD_PATHNAME: return ENOENT; - case ERROR_LOCK_FAILED: return EACCES; - case ERROR_ALREADY_EXISTS: return EEXIST; - case ERROR_FILENAME_EXCED_RANGE: return ENAMETOOLONG; - case ERROR_BAD_PIPE: return EPIPE; - case ERROR_PIPE_BUSY: return EAGAIN; - case ERROR_PIPE_NOT_CONNECTED: return EPIPE; - case ERROR_DIRECTORY: return ENOTDIR; - } - return EINVAL; -} - -static int JimPipe(fdtype pipefd[2]) -{ - if (CreatePipe(&pipefd[0], &pipefd[1], NULL, 0)) { - return 0; - } - return -1; -} - -static fdtype JimDupFd(fdtype infd) -{ - fdtype dupfd; - pidtype pid = GetCurrentProcess(); - - if (DuplicateHandle(pid, infd, pid, &dupfd, 0, TRUE, DUPLICATE_SAME_ACCESS)) { - return dupfd; - } - return JIM_BAD_FD; -} - -static int JimRewindFd(fdtype fd) -{ - return SetFilePointer(fd, 0, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER ? -1 : 0; -} - -#if 0 -static int JimReadFd(fdtype fd, char *buffer, size_t len) -{ - DWORD num; - - if (ReadFile(fd, buffer, len, &num, NULL)) { - return num; - } - if (GetLastError() == ERROR_HANDLE_EOF || GetLastError() == ERROR_BROKEN_PIPE) { - return 0; - } - return -1; -} -#endif - -static FILE *JimFdOpenForRead(fdtype fd) -{ - return _fdopen(_open_osfhandle((int)fd, _O_RDONLY | _O_TEXT), "r"); -} - -static fdtype JimFileno(FILE *fh) -{ - return (fdtype)_get_osfhandle(_fileno(fh)); -} - -static fdtype JimOpenForRead(const char *filename) -{ - return CreateFile(filename, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, - JimStdSecAttrs(), OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); -} - -static fdtype JimOpenForWrite(const char *filename, int append) -{ - fdtype fd = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, - JimStdSecAttrs(), append ? OPEN_ALWAYS : CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, (HANDLE) NULL); - if (append && fd != JIM_BAD_FD) { - SetFilePointer(fd, 0, NULL, FILE_END); - } - return fd; -} - -static FILE *JimFdOpenForWrite(fdtype fd) -{ - return _fdopen(_open_osfhandle((int)fd, _O_TEXT), "w"); -} - -static pidtype JimWaitPid(pidtype pid, int *status, int nohang) -{ - DWORD ret = WaitForSingleObject(pid, nohang ? 0 : INFINITE); - if (ret == WAIT_TIMEOUT || ret == WAIT_FAILED) { - /* WAIT_TIMEOUT can only happend with WNOHANG */ - return JIM_BAD_PID; - } - GetExitCodeProcess(pid, &ret); - *status = ret; - CloseHandle(pid); - return pid; -} - -static HANDLE JimCreateTemp(Jim_Interp *interp, const char *contents, int len) -{ - char name[MAX_PATH]; - HANDLE handle; - - if (!GetTempPath(MAX_PATH, name) || !GetTempFileName(name, "JIM", 0, name)) { - return JIM_BAD_FD; - } - - handle = CreateFile(name, GENERIC_READ | GENERIC_WRITE, 0, JimStdSecAttrs(), - CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE, - NULL); - - if (handle == INVALID_HANDLE_VALUE) { - goto error; - } - - if (contents != NULL) { - /* Use fdopen() to get automatic text-mode translation */ - FILE *fh = JimFdOpenForWrite(JimDupFd(handle)); - if (fh == NULL) { - goto error; - } - - if (fwrite(contents, len, 1, fh) != 1) { - fclose(fh); - goto error; - } - fseek(fh, 0, SEEK_SET); - fclose(fh); - } - return handle; - - error: - Jim_SetResultErrno(interp, "failed to create temp file"); - CloseHandle(handle); - DeleteFile(name); - return JIM_BAD_FD; -} - static int JimWinFindExecutable(const char *originalName, char fullPath[MAX_PATH]) { @@ -1425,6 +1279,11 @@ static void JimRestoreEnv(char **env) JimFreeEnv(env, Jim_GetEnviron()); } +static char **JimOriginalEnviron(void) +{ + return NULL; +} + static Jim_Obj * JimWinBuildCommandLine(Jim_Interp *interp, char **argv) { @@ -1501,15 +1360,19 @@ JimWinBuildCommandLine(Jim_Interp *interp, char **argv) return strObj; } +/** + * Note that inputId, etc. are osf_handles. + */ static pidtype -JimStartWinProcess(Jim_Interp *interp, char **argv, char *env, fdtype inputId, fdtype outputId, fdtype errorId) +JimStartWinProcess(Jim_Interp *interp, char **argv, char **env, int inputId, int outputId, int errorId) { STARTUPINFO startInfo; PROCESS_INFORMATION procInfo; - HANDLE hProcess, h; + HANDLE hProcess; char execPath[MAX_PATH]; pidtype pid = JIM_BAD_PID; Jim_Obj *cmdLineObj; + char *winenv; if (JimWinFindExecutable(argv[0], execPath) < 0) { return JIM_BAD_PID; @@ -1537,47 +1400,57 @@ JimStartWinProcess(Jim_Interp *interp, char **argv, char *env, fdtype inputId, f * and stderr of the child process. The duplicate handles are set to * be inheritable, so the child process can use them. */ - if (inputId == JIM_BAD_FD) { - if (CreatePipe(&startInfo.hStdInput, &h, JimStdSecAttrs(), 0) != FALSE) { - CloseHandle(h); - } - } else { - DuplicateHandle(hProcess, inputId, hProcess, &startInfo.hStdInput, - 0, TRUE, DUPLICATE_SAME_ACCESS); + /* + * If stdin was not redirected, input should come from the parent's stdin + */ + if (inputId == -1) { + inputId = _fileno(stdin); } - if (startInfo.hStdInput == JIM_BAD_FD) { + DuplicateHandle(hProcess, (HANDLE)_get_osfhandle(inputId), hProcess, &startInfo.hStdInput, + 0, TRUE, DUPLICATE_SAME_ACCESS); + if (startInfo.hStdInput == INVALID_HANDLE_VALUE) { goto end; } - if (outputId == JIM_BAD_FD) { - startInfo.hStdOutput = CreateFile("NUL:", GENERIC_WRITE, 0, - JimStdSecAttrs(), OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); - } else { - DuplicateHandle(hProcess, outputId, hProcess, &startInfo.hStdOutput, - 0, TRUE, DUPLICATE_SAME_ACCESS); + /* + * If stdout was not redirected, output should go to the parent's stdout + */ + if (outputId == -1) { + outputId = _fileno(stdout); } - if (startInfo.hStdOutput == JIM_BAD_FD) { + DuplicateHandle(hProcess, (HANDLE)_get_osfhandle(outputId), hProcess, &startInfo.hStdOutput, + 0, TRUE, DUPLICATE_SAME_ACCESS); + if (startInfo.hStdOutput == INVALID_HANDLE_VALUE) { goto end; } - if (errorId == JIM_BAD_FD) { - /* - * If handle was not set, errors should be sent to an infinitely - * deep sink. - */ - - startInfo.hStdError = CreateFile("NUL:", GENERIC_WRITE, 0, - JimStdSecAttrs(), OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); - } else { - DuplicateHandle(hProcess, errorId, hProcess, &startInfo.hStdError, - 0, TRUE, DUPLICATE_SAME_ACCESS); + /* Ditto stderr */ + if (errorId == -1) { + errorId = _fileno(stderr); } - if (startInfo.hStdError == JIM_BAD_FD) { + DuplicateHandle(hProcess, (HANDLE)_get_osfhandle(errorId), hProcess, &startInfo.hStdError, + 0, TRUE, DUPLICATE_SAME_ACCESS); + if (startInfo.hStdError == INVALID_HANDLE_VALUE) { goto end; } + /* If env is NULL, use the original environment. + * If env[0] is NULL, use an empty environment. + * Otherwise use the environment starting at env[0] + */ + if (env == NULL) { + /* Use the original environment */ + winenv = NULL; + } + else if (env[0] == NULL) { + winenv = (char *)"\0"; + } + else { + winenv = env[0]; + } + if (!CreateProcess(NULL, (char *)Jim_String(cmdLineObj), NULL, NULL, TRUE, - 0, env, NULL, &startInfo, &procInfo)) { + 0, winenv, NULL, &startInfo, &procInfo)) { goto end; } @@ -1597,45 +1470,23 @@ JimStartWinProcess(Jim_Interp *interp, char **argv, char *env, fdtype inputId, f end: Jim_FreeNewObj(interp, cmdLineObj); - if (startInfo.hStdInput != JIM_BAD_FD) { + if (startInfo.hStdInput != INVALID_HANDLE_VALUE) { CloseHandle(startInfo.hStdInput); } - if (startInfo.hStdOutput != JIM_BAD_FD) { + if (startInfo.hStdOutput != INVALID_HANDLE_VALUE) { CloseHandle(startInfo.hStdOutput); } - if (startInfo.hStdError != JIM_BAD_FD) { + if (startInfo.hStdError != INVALID_HANDLE_VALUE) { CloseHandle(startInfo.hStdError); } return pid; } -#else -/* Unix-specific implementation */ -static int JimOpenForWrite(const char *filename, int append) -{ - return open(filename, O_WRONLY | O_CREAT | (append ? O_APPEND : O_TRUNC), 0666); -} -static int JimRewindFd(int fd) -{ - return lseek(fd, 0L, SEEK_SET); -} +#else -static int JimCreateTemp(Jim_Interp *interp, const char *contents, int len) +static char **JimOriginalEnviron(void) { - int fd = Jim_MakeTempFile(interp, NULL); - - if (fd != JIM_BAD_FD) { - unlink(Jim_String(Jim_GetResult(interp))); - if (contents) { - if (write(fd, contents, len) != len) { - Jim_SetResultErrno(interp, "couldn't write temp file"); - close(fd); - return -1; - } - lseek(fd, 0L, SEEK_SET); - } - } - return fd; + return Jim_GetEnviron(); } static char **JimSaveEnv(char **env) |