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50 lines
1.4 KiB
50 lines
1.4 KiB
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <stdio.h>
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int main(int argc, const char **argv)
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{
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if (argc < 2)
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{
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printf("Specify app name\n");
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return -1;
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}
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const char* childStr = "APPLICATION: After vfork in child\n";
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size_t childStrLen = strlen(childStr);
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char *newArg[2];
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newArg[0] = (char *)argv[1];
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newArg[1] = NULL;
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pid_t child_id = vfork();
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if (child_id == 0)
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{
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// Use the write syscall directly.
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// Be careful not to use printf() which might allocate memory:
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// After vfork the child process shares the same memory space with the parent process.
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// So, allocating memory in the child process might mess with the parent process memory space!
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write(STDOUT_FILENO, (void*)childStr, childStrLen);
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execv(argv[1], newArg);
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}
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else
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{
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printf("APPLICATION: After vfork in parent\n");
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wait(0);
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execv(argv[1], newArg);
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}
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return 0;
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}
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