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The shell now implements $$, $PPID, and $? as normal variables.

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This commit is contained in:
Jonas 'Sortie' Termansen 2012-04-13 22:41:07 +02:00
parent a24e86e751
commit b554eb2dfb
1 changed files with 13 additions and 5 deletions
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18
utils/mxsh.cpp
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@ -139,7 +139,7 @@ readcmd:
goto readcmd;
}
int status = internalresult;
status = internalresult;
if ( !internal && waitpid(childpid, &status, 0) < 0 )
{
perror("waitpid");
@ -182,6 +182,10 @@ readcmd:
}
}
char statusstr[32];
sprintf(statusstr, "%i", status);
setenv("?", statusstr, 1);
for ( char** argp = argv; *argp; argp++ )
{
char* arg = *argp;
@ -248,10 +252,6 @@ void command()
if ( command[0] == '\0' ) { return; }
if ( strcmp(command, "$?") == 0 ) { printf("%u\n", status); status = 0; return; }
if ( strcmp(command, "$$") == 0 ) { printf("%u\n", getpid()); status = 0; return; }
if ( strcmp(command, "$PPID") == 0 ) { printf("%u\n", getppid()); status = 0; return; }
if ( strchr(command, '=') )
{
if ( putenv(strdup(command)) ) { perror("putenv"); status = 1; return; }
@ -290,6 +290,14 @@ void command()
int main(int argc, char* argv[])
{
char pidstr[32];
char ppidstr[32];
sprintf(pidstr, "%i", getpid());
sprintf(ppidstr, "%i", getppid());
setenv("SHELL", argv[0], 1);
setenv("$", pidstr, 1);
setenv("PPID", ppidstr, 1);
setenv("?", "0", 1);
while ( true ) { command(); }
}