02add9e53a
applet list yet (and won't be until it can replace lash, I'm not having five shells in menuconfig at once), but you can build it with scripts/individual and mostly this is checked in so I can bloatcheck future versions against it easily.... This is about as small as a shell can get and still be a shell.
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
/* vi: set ts=4 :
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*
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* bbsh - busybox shell
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*
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* Copyright 2006 Rob Landley <rob@landley.net>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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// Handle embedded NUL bytes in the command line.
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#include <busybox.h>
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static int handle(char *command)
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{
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int argc=0;
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char *argv[10], *start = command;
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// Parse command into argv[]
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for (;;) {
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char *end;
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// Skip leading whitespace and detect EOL.
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while(isspace(*start)) start++;
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if(!*start || *start=='#') break;
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// Grab next word. (Add dequote and envvar logic here)
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end=start;
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while(*end && !isspace(*end)) end++;
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argv[argc++]=xstrndup(start,end-start);
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start=end;
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}
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argv[argc]=0;
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if (!argc) return 0;
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if (argc==2 && !strcmp(argv[0],"cd")) chdir(argv[1]);
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else if(!strcmp(argv[0],"exit")) exit(argc>1 ? atoi(argv[1]) : 0);
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else {
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int status;
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pid_t pid=fork();
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if(!pid) {
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run_applet_by_name(argv[0],argc,argv);
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execvp(argv[0],argv);
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printf("No %s",argv[0]);
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exit(1);
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} else waitpid(pid, &status, 0);
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}
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while(argc) free(argv[--argc]);
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return 0;
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}
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int bbsh_main(int argc, char *argv[])
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{
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char *command=NULL;
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FILE *f;
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bb_getopt_ulflags(argc, argv, "c:", &command);
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f = argv[optind] ? xfopen(argv[optind],"r") : NULL;
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if (command) handle(command);
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else {
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unsigned cmdlen=0;
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for (;;) {
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if(!f) putchar('$');
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if(1 > getline(&command,&cmdlen,f ? : stdin)) break;
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handle(command);
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}
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if (ENABLE_FEATURE_CLEAN_UP) free(command);
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}
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return 1;
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}
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