...
| Wiki Markup |
|---|
Command line arguments are passed as arguments to {{main()}}. In the following definition for {{main()}} the array members {{argv\[0\]}} through {{argv\[argc-1\]}} inclusive contain pointers to strings. |
...
| Code Block |
|---|
int main(int argc, char *argv[]) {
...
char prog_name[128];
strcpy(prog_name, argv[0]);
...
}
|
Non-compliant Code Example 2
...
| Code Block |
|---|
int main(int argc, char *argv[]) {
...
char * prog_name = (char *)malloc(strlen(argv[0])+1);
if (prog_name != NULL) {
strcpy(prog_name, argv[1]);
}
else {
/* Couldn't get the memory - recover */
}
...
}
|
Compliant Solution 2
The strlen() function should be used to determine the length of environmental variables so that adequate memory can be dynamically allocated:
| Code Block |
|---|
char *editor; char *buff; editor = (char *)getenv("EDITOR"); if (editor) { buff = (char *)malloc(strlen(editor)+1); strcpy(buff, editor); } |
References
- ISO/IEC 9899:-1999 5.1.2.2.1 Program startup
- ISO/IEC 9899:-1999 7.20.4.5 The getenv function