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colon-command support

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Shells such as bash, sh, tcsh, and ksh each support a "colon command" that causes the script to be
evaluated as a bourne script. In the case of bash and sh, this command is a no-op. For others,
it means the script has sh syntax.

To suppor this in fish, I've added code to launch_process that checks for a ':' as the first
character of p->actual_cmd. If it is a colon, the process descriptor is modified to call
/bin/sh, which should exist on any POSIX system.

darcs-hash:20061208220428-5830d-6bde4f1a3e8100296a60c21f9e47988e20688a77.gz
This commit is contained in:
nickburlett
2006-12-09 08:04:28 +10:00
parent 1d3465698f
commit 23759e6eca
1 changed files with 32 additions and 1 deletions
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33
exec.c
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@@ -447,7 +447,38 @@ static int setup_child_process( job_t *j, process_t *p )
static void launch_process( process_t *p )
{
// debug( 1, L"exec '%ls'", p->argv[0] );
/* check for a ":\n", and run system() if so */
FILE* f = wfopen(p->actual_cmd, "r");
if (f != NULL)
{
char begin[1] = {0};
fread(begin, 1, 1, f);
if (begin[0] == ':')
{
int count = 0;
int i = 1;
int j = 2;
while( p->argv[count] != 0 )
count++;
wchar_t **res = malloc( sizeof(wchar_t*)*(count+2));
res[0] = L"/bin/sh";
res[1] = p->actual_cmd;
while( p->argv[i] != 0 )
{
res[j] = p->argv[i];
i++;
j++;
}
res[j] = NULL;
free(p->argv);
p->argv = res;
p->actual_cmd = L"/bin/sh";
}
}
execve ( wcs2str(p->actual_cmd),
wcsv2strv( (const wchar_t **) p->argv),
env_export_arr( 0 ) );