diff --git a/shell/bbsh.c b/shell/bbsh.c new file mode 100644 index 000000000..f2d76cc01 --- /dev/null +++ b/shell/bbsh.c @@ -0,0 +1,73 @@ +/* vi: set ts=4 : + * + * bbsh - busybox shell + * + * Copyright 2006 Rob Landley + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +// Handle embedded NUL bytes in the command line. + +#include + +static int handle(char *command) +{ + int argc=0; + char *argv[10], *start = command; + + // Parse command into argv[] + for (;;) { + char *end; + + // Skip leading whitespace and detect EOL. + while(isspace(*start)) start++; + if(!*start || *start=='#') break; + + // Grab next word. (Add dequote and envvar logic here) + end=start; + while(*end && !isspace(*end)) end++; + argv[argc++]=xstrndup(start,end-start); + start=end; + } + argv[argc]=0; + + if (!argc) return 0; + if (argc==2 && !strcmp(argv[0],"cd")) chdir(argv[1]); + else if(!strcmp(argv[0],"exit")) exit(argc>1 ? atoi(argv[1]) : 0); + else { + int status; + pid_t pid=fork(); + if(!pid) { + run_applet_by_name(argv[0],argc,argv); + execvp(argv[0],argv); + printf("No %s",argv[0]); + exit(1); + } else waitpid(pid, &status, 0); + } + while(argc) free(argv[--argc]); + + return 0; +} + +int bbsh_main(int argc, char *argv[]) +{ + char *command=NULL; + FILE *f; + + bb_getopt_ulflags(argc, argv, "c:", &command); + + f = argv[optind] ? xfopen(argv[optind],"r") : NULL; + if (command) handle(command); + else { + unsigned cmdlen=0; + for (;;) { + if(!f) putchar('$'); + if(1 > getline(&command,&cmdlen,f ? : stdin)) break; + handle(command); + } + if (ENABLE_FEATURE_CLEAN_UP) free(command); + } + + return 1; +}