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ENH: Added Option_Verbatim to run whole command lines directly.

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This commit is contained in:
Brad King
2006-06-15 14:40:42 -04:00
parent 6071052835
commit 6438bec4c9
3 changed files with 517 additions and 183 deletions
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Source/kwsys/ProcessUNIX.c
+301 -26
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@@ -60,6 +60,7 @@ do.
#include <time.h> /* gettimeofday */
#include <signal.h> /* sigaction */
#include <dirent.h> /* DIR, dirent */
#include <ctype.h> /* isspace */
/* The number of pipes for the child's output. The standard stdout
and stderr pipes are the first two. One more pipe is used to
@@ -122,6 +123,7 @@ static int kwsysProcessesAdd(kwsysProcess* cp);
static void kwsysProcessesRemove(kwsysProcess* cp);
static void kwsysProcessesSignalHandler(int signum, siginfo_t* info,
void* ucontext);
static char** kwsysProcessParseVerbatimCommand(const char* command);
/*--------------------------------------------------------------------------*/
/* Structure containing data used to implement the child's execution. */
@@ -159,6 +161,9 @@ struct kwsysProcess_s
/* Whether the child was created as a detached process. */
int Detached;
/* Whether to treat command lines as verbatim. */
int Verbatim;
/* Time at which the child started. Negative for no timeout. */
kwsysProcessTime StartTime;
@@ -309,7 +314,7 @@ int kwsysProcess_AddCommand(kwsysProcess* cp, char const* const* command)
char*** newCommands;
/* Make sure we have a command to add. */
if(!cp || !command)
if(!cp || !command || !*command)
{
return 0;
}
@@ -332,39 +337,54 @@ int kwsysProcess_AddCommand(kwsysProcess* cp, char const* const* command)
}
/* Add the new command. */
{
char const* const* c = command;
int n = 0;
int i = 0;
while(*c++);
n = c - command - 1;
newCommands[cp->NumberOfCommands] = (char**)malloc((n+1)*sizeof(char*));
if(!newCommands[cp->NumberOfCommands])
if(cp->Verbatim)
{
/* Out of memory. */
free(newCommands);
return 0;
}
for(i=0; i < n; ++i)
{
newCommands[cp->NumberOfCommands][i] = strdup(command[i]);
if(!newCommands[cp->NumberOfCommands][i])
/* In order to run the given command line verbatim we need to
parse it. */
newCommands[cp->NumberOfCommands] =
kwsysProcessParseVerbatimCommand(*command);
if(!newCommands[cp->NumberOfCommands])
{
break;
/* Out of memory. */
free(newCommands);
return 0;
}
}
if(i < n)
else
{
/* Out of memory. */
for(;i > 0; --i)
/* Copy each argument string individually. */
char const* const* c = command;
int n = 0;
int i = 0;
while(*c++);
n = c - command - 1;
newCommands[cp->NumberOfCommands] = (char**)malloc((n+1)*sizeof(char*));
if(!newCommands[cp->NumberOfCommands])
{
free(newCommands[cp->NumberOfCommands][i-1]);
/* Out of memory. */
free(newCommands);
return 0;
}
free(newCommands);
return 0;
for(i=0; i < n; ++i)
{
newCommands[cp->NumberOfCommands][i] = strdup(command[i]);
if(!newCommands[cp->NumberOfCommands][i])
{
break;
}
}
if(i < n)
{
/* Out of memory. */
for(;i > 0; --i)
{
free(newCommands[cp->NumberOfCommands][i-1]);
}
free(newCommands);
return 0;
}
newCommands[cp->NumberOfCommands][n] = 0;
}
newCommands[cp->NumberOfCommands][n] = 0;
}
/* Successfully allocated new command array. Free the old array. */
free(cp->Commands);
@@ -492,6 +512,7 @@ int kwsysProcess_GetOption(kwsysProcess* cp, int optionId)
switch(optionId)
{
case kwsysProcess_Option_Detach: return cp->OptionDetach;
case kwsysProcess_Option_Verbatim: return cp->Verbatim;
default: return 0;
}
}
@@ -507,6 +528,7 @@ void kwsysProcess_SetOption(kwsysProcess* cp, int optionId, int value)
switch(optionId)
{
case kwsysProcess_Option_Detach: cp->OptionDetach = value; break;
case kwsysProcess_Option_Verbatim: cp->Verbatim = value; break;
default: break;
}
}
@@ -2256,3 +2278,256 @@ static void kwsysProcessesSignalHandler(int signum, siginfo_t* info,
write(cp->SignalPipe, &buf, 1);
}
}
/*--------------------------------------------------------------------------*/
static int kwsysProcessAppendByte(char* local,
char** begin, char** end,
int* size, char c)
{
/* Allocate space for the character. */
if((*end - *begin) >= *size)
{
int length = *end - *begin;
char* newBuffer = (char*)malloc(*size*2);
if(!newBuffer)
{
return 0;
}
memcpy(newBuffer, *begin, length*sizeof(char));
if(*begin != local)
{
free(*begin);
}
*begin = newBuffer;
*end = *begin + length;
*size *= 2;
}
/* Store the character. */
*(*end)++ = c;
return 1;
}
/*--------------------------------------------------------------------------*/
static int kwsysProcessAppendArgument(char** local,
char*** begin, char*** end,
int* size,
char* arg_local,
char** arg_begin, char** arg_end,
int* arg_size)
{
/* Append a null-terminator to the argument string. */
if(!kwsysProcessAppendByte(arg_local, arg_begin, arg_end, arg_size, '\0'))
{
return 0;
}
/* Allocate space for the argument pointer. */
if((*end - *begin) >= *size)
{
int length = *end - *begin;
char** newPointers = (char**)malloc(*size*2*sizeof(char*));
if(!newPointers)
{
return 0;
}
memcpy(newPointers, *begin, length*sizeof(char*));
if(*begin != local)
{
free(*begin);
}
*begin = newPointers;
*end = *begin + length;
*size *= 2;
}
/* Allocate space for the argument string. */
**end = (char*)malloc(*arg_end - *arg_begin);
if(!**end)
{
return 0;
}
/* Store the argument in the command array. */
memcpy(**end, *arg_begin, *arg_end - *arg_begin);
++(*end);
/* Reset the argument to be empty. */
*arg_end = *arg_begin;
return 1;
}
/*--------------------------------------------------------------------------*/
#define KWSYSPE_LOCAL_BYTE_COUNT 1024
#define KWSYSPE_LOCAL_ARGS_COUNT 32
static char** kwsysProcessParseVerbatimCommand(const char* command)
{
/* Create a buffer for argument pointers during parsing. */
char* local_pointers[KWSYSPE_LOCAL_ARGS_COUNT];
int pointers_size = KWSYSPE_LOCAL_ARGS_COUNT;
char** pointer_begin = local_pointers;
char** pointer_end = pointer_begin;
/* Create a buffer for argument strings during parsing. */
char local_buffer[KWSYSPE_LOCAL_BYTE_COUNT];
int buffer_size = KWSYSPE_LOCAL_BYTE_COUNT;
char* buffer_begin = local_buffer;
char* buffer_end = buffer_begin;
/* Parse the command string. Try to behave like a UNIX shell. */
char** newCommand = 0;
const char* c = command;
int in_argument = 0;
int in_escape = 0;
int in_single = 0;
int in_double = 0;
int failed = 0;
for(;*c; ++c)
{
if(in_escape)
{
/* This character is escaped so do no special handling. */
if(!in_argument)
{
in_argument = 1;
}
if(!kwsysProcessAppendByte(local_buffer, &buffer_begin,
&buffer_end, &buffer_size, *c))
{
failed = 1;
break;
}
in_escape = 0;
}
else if(*c == '\\' && !in_single)
{
/* The next character should be escaped. */
in_escape = 1;
}
else if(*c == '\'' && !in_double)
{
/* Enter or exit single-quote state. */
if(in_single)
{
in_single = 0;
}
else
{
in_single = 1;
if(!in_argument)
{
in_argument = 1;
}
}
}
else if(*c == '"' && !in_single)
{
/* Enter or exit double-quote state. */
if(in_double)
{
in_double = 0;
}
else
{
in_double = 1;
if(!in_argument)
{
in_argument = 1;
}
}
}
else if(isspace(*c))
{
if(in_argument)
{
if(in_single || in_double)
{
/* This space belongs to a quoted argument. */
if(!kwsysProcessAppendByte(local_buffer, &buffer_begin,
&buffer_end, &buffer_size, *c))
{
failed = 1;
break;
}
}
else
{
/* This argument has been terminated by whitespace. */
if(!kwsysProcessAppendArgument(local_pointers, &pointer_begin,
&pointer_end, &pointers_size,
local_buffer, &buffer_begin,
&buffer_end, &buffer_size))
{
failed = 1;
break;
}
in_argument = 0;
}
}
}
else
{
/* This character belong to an argument. */
if(!in_argument)
{
in_argument = 1;
}
if(!kwsysProcessAppendByte(local_buffer, &buffer_begin,
&buffer_end, &buffer_size, *c))
{
failed = 1;
break;
}
}
}
/* Finish the last argument. */
if(in_argument)
{
if(!kwsysProcessAppendArgument(local_pointers, &pointer_begin,
&pointer_end, &pointers_size,
local_buffer, &buffer_begin,
&buffer_end, &buffer_size))
{
failed = 1;
}
}
/* If we still have memory allocate space for the new command
buffer. */
if(!failed)
{
int n = pointer_end - pointer_begin;
newCommand = (char**)malloc((n+1)*sizeof(char*));
}
if(newCommand)
{
/* Copy the arguments into the new command buffer. */
int n = pointer_end - pointer_begin;
memcpy(newCommand, pointer_begin, sizeof(char*)*n);
newCommand[n] = 0;
}
else
{
/* Free arguments already allocated. */
while(pointer_end != pointer_begin)
{
free(*(--pointer_end));
}
}
/* Free temporary buffers. */
if(pointer_begin != local_pointers)
{
free(pointer_begin);
}
if(buffer_begin != local_buffer)
{
free(buffer_begin);
}
/* Return the final command buffer. */
return newCommand;
}