cyp0633
/
CSAPP-labs
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Shell Lab: trace02

This commit is contained in:
cyp0633 2022-05-24 00:01:03 +08:00
parent c081d56e4a
commit dd323368d0
Signed by: cyp0633
GPG Key ID: E1BC508A994A5138
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
shlab/tsh.c
View File

@ -177,7 +177,7 @@ void eval(char *cmdline)
return; return;
} }
// run external command // run external command
if (!builtin_cmd(argv)) if (!builtin_cmd(argv)) // built-in command is done in `builtin_cmd`
{ {
if ((pid = fork()) == 0) // this is child if ((pid = fork()) == 0) // this is child
{ {
@ -267,6 +267,10 @@ int parseline(const char *cmdline, char **argv)
*/ */
int builtin_cmd(char **argv) int builtin_cmd(char **argv)
{ {
if (strcmp(argv[0], "quit") == 0) // process quit command
{
exit(0);
}
return 0; /* not a builtin command */ return 0; /* not a builtin command */
} }