我的程序接受了很多选项 我必须编写一个shell脚本来测试我的程序。
shell脚本必须多次运行我的程序，并且每次必须为选项传递不同的选项和不同的参数。
例如：
#!/bin/bash
echo "CS111 " > testing.txt
echo "is " >> testing.txt
echo "intersting " >> testing.txt
echo "even " >> testing.txt
echo "though " >> testing.txt
echo "it " >> testing.txt
echo "is " >> testing.txt
echo "time " >> testing.txt
echo "consuming " >> testting.txt
echo "and " >> testing.txt
echo "hard " >> testing.txt
./simpsh \
--verbose \
--rdonly in.txt \
--append --wronly out.txt \
--wronly err.txt \
--command 0 1 2 sort testing
./simpsh \
--verbose\
--rdonly in.txt \
--append --wronly out.txt \
--wronly err.txt \
--command 0 1 2 sort
将执行第一个测试，但是会出现错误127.
这是我的代码：
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
int main(int argc, char **argv)
{
int c;
int oflag = 0;
int *fd;
int fdCount = 0;
int pipefd[2];
int p;
int verbose = 0;
while (1) {
static struct option long_options[] = {
{"append",no_argument,0,'a'},
{"cloexec",no_argument,0,'b'},
{"creat", no_argument,0,'c'},
{"directory",no_argument,0,'d'},
{"dsync",no_argument,0,'e'},
{"excl",no_argument,0,'f'},
{"nofollow",no_argument,0,'g'},
{"nonblock",no_argument, 0,'h'},
{"rsync",no_argument,0,'i'},
{"sync",no_argument,0,'j'},
{"trunc",no_argument,0,'k'},
{"rdonly",required_argument,0,'l'},
{"rdwr",required_argument,0,'m'},
{"wronly",required_argument,0,'n'},
{"pipe",no_argument,0,'o'},
{"command",required_argument,0,'p'},
{"wait",no_argument,0,'q'},
{"close",required_argument,0,'r'},
{"verbose",no_argument,0,'s'},
{"profile",no_argument,0,'t'},
{"abort",no_argument,0,'u'},
{"catch",required_argument,0,'v'},
{"ignore",required_argument,0,'w'},
{"default",required_argument,0,'x'},
{"pause",no_argument,0,'y'},
};
c = getopt_long(argc, argv, "abcdefghijkl:m:n:op:qr:stuv:w:x:y", long_options, NULL);
if (c == -1)
break;
switch (c) {
case 'a':
if(verbose)
printf("O_APPEND\n");
oflag = oflag | O_APPEND;
break;
case 'b':
if(verbose)
printf("O_CLOEXEC\n");
oflag = oflag | O_CLOEXEC;
break;
case 'c':
if(verbose)
printf("O_CREAT\n");
oflag = oflag | O_CREAT;
break;
case 'd':
if(verbose)
printf("O_DIRECTORY\n");
oflag = oflag | O_DIRECTORY;
break;
case 'e':
if(verbose)
printf("O_DSYNC\n");
oflag = oflag | O_DSYNC;
break;
case 'f':
if(verbose)
printf("O_EXCL\n");
oflag = oflag | O_EXCL;
break;
case 'g':
if(verbose)
printf("O_NOFOLLOW\n");
oflag = oflag | O_NOFOLLOW;
break;
case 'h':
if(verbose)
printf("O_NONBLOCK\n");
oflag = oflag | O_NONBLOCK;
break;
case 'i':
if(verbose)
printf("O_RSYNC\n");
oflag = oflag | O_RSYNC;
break;
case 'j':
if(verbose)
printf("O_SYNC\n");
oflag = oflag | O_SYNC;
break;
case 'k':
if(verbose)
printf("O_TRUNC\n");
oflag = oflag | O_TRUNC;
break;
case 'l':
if(optarg){
if(fdCount == 0)
fd = (int *)malloc(sizeof(int));
else
fd = (int *)realloc(fd, (fdCount + 1)* sizeof(int));
if(verbose)
printf("O_RDONLY %s\n", optarg);
fd[fdCount] = open(optarg, oflag | O_RDONLY, S_IRWXU | S_IRWXG | S_IRWXO);
oflag = 0;
if(fd[fdCount] == -1){
fprintf(stderr, "%s cannot be opened/created", optarg);
exit(1);
}
else
fdCount++;
}
break;
case 'm':
if(optarg){
if(fdCount == 0)
fd = (int *)malloc(sizeof(int));
else
fd = (int *)realloc(fd, (fdCount + 1)* sizeof(int));
if(verbose)
printf("O_RDWR %s\n", optarg);
fd[fdCount] = open(optarg, oflag | O_RDWR, S_IRWXU | S_IRWXG | S_IRWXO);
oflag = 0;
if(fd[fdCount] == -1){
fprintf(stderr, "%s cannot be opened/created", optarg);
exit(2);
}
else
fdCount++;
}
break;
case 'n':
if(optarg){
if(fdCount == 0)
fd = (int *)malloc(sizeof(int));
else
fd = (int *)realloc(fd, (fdCount + 1)* sizeof(int));
if(verbose)
printf("O_WRONLY %s\n", optarg);
fd[fdCount] = open(optarg, oflag | O_WRONLY, S_IRWXU | S_IRWXG | S_IRWXO);
oflag = 0;
if(fd[fdCount] == -1){
fprintf(stderr, "%s cannot be opened/created", optarg);
exit(3);
}
else
fdCount++;
}
break;
case 'o':
if(verbose)
printf("pipe\n");
p = pipe(pipefd);
if(p == -1){
fprintf(stderr, "The pipe wasn't made.\n");
exit(5);
}
else{
if(fdCount == 0)
fd = (int *)malloc(2 * sizeof(int));
else
fd = (int *)realloc(fd, (fdCount + 2) * sizeof(int));
fdCount = fdCount + 2;
fd[fdCount - 2] = pipefd[0];
fd[fdCount - 1] = pipefd[1];
}
break;
case 'p':
if(optarg){
if(verbose){
printf("command ");
int vi = optind -1;
for( vi = optind - 1; vi < argc && *argv[vi] != '-'; vi++)
printf("%s ", argv[vi]);
printf("\n");
}
pid_t pid = fork();
if(pid == 0){
int fdin;
int fdout;
int fderr;
int i = 0;
char **arg;
int index;
for(index = optind-1; index < argc && *argv[index] != '-'; index++, i++){
switch(i){
case 0:
fdin = atoi(argv[index]);
break;
case 1:
fdout = atoi(argv[index]);
break;
case 2:
fderr = atoi(argv[index]);
break;
default:
if(i - 3 == 0)
arg = (char**)malloc(sizeof(char));
else
arg = (char**)realloc(arg, ((i - 3) + 1)* sizeof(char));
arg[i - 3] = strdup(argv[index]);
}
}
dup2(fd[fdin],0);
close(fd[fdin]);
dup2(fd[fdout],1);
close(fd[fdout]);
dup2(fd[fderr],2);
close(fd[fderr]);
execvp(arg[0], arg);
}
else if(pid == -1){
fprintf(stderr, "The new proccess isn't created by fork()\n");
exit(6);
}
}
break;
case 'q':
break;
case 'r':
break;
case 's':
verbose = 1;
break;
case 't':
break;
case 'u':
break;
case 'v':
break;
case 'w':
break;
case 'x':
break;
case 'y':
break;
default:
fprintf(stderr, "An option is misstyped or has no argument\n");
exit(4);
}
}
exit(0);
}
答案 0 :(得分：1)
返回代码127表示找不到命令。
在您执行测试脚本的当前目录中找不到myprogram。
尝试切换到程序所在的目录，或使用完整路径调用它。
另外，请记住bash忽略失败的命令，除非你激活＆＃34; -e＆＃34;标记或捕获错误并明确处理它们。在构建测试脚本（或任何脚本）时，允许静默失败可能会导致不良后果。