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Is mktemp safe?
mktemp(3) is your friend Ok, so creation of temporary files is a pain. You need to account for existence of the file, use a unique name, protect the file, and later (safely) remove the file again. But if you can’t, the above “umask; mktemp; rm” combination is the only reasonable approach.
Can mktemp fail?
Yes, mktemp can fail. For example, “TMPDIR=/dev/null mktemp -d” will reliably fail. You shouldn’t be validating it starts with “/tmp” though, because on quite a few systems, people set TMPDIR=/var/tmp. You absolutely should check if mktemp exited nonzero, but if it exited 0, the directory should be safe to use.
What is mktemp used for?
mktemp – create a temporary file or directory. Create a temporary file or directory, safely, and print its name. It simply change the timestamps of a file if already created and create a file if does not exist.
What is $Tmpdir?
The os. tmpdir() method is an inbuilt application programming interface of the os module which is used to get path of default directory for temporary files of the operating system. Syntax: os.tmpdir() Parameters: This method does not accept any parameters.
What is Java IO TMPDIR?
The java. io. tmpdir system property indicates the temporary directory used by the Java Virtual Machine (JVM) to create and store temporary files. The default value is typically “/tmp” , or “/var/tmp” on Unix-like platforms. tmpdir property is typically “C:\\WINNT\\TEMP” .
What does Mktemp return?
The mktemp() function shall return the pointer template. If a unique name cannot be created, template shall point to a null string.
Is there a way to suppress the use of mktemp?
If so you can create a temp dir with mkdtemp and place your file there, the actual name is then unimportant because the path is already unique because of the directory. If you have to use mktemp then there is not anything you can do to suppress that warning short of removing the section that uses mktemp from libc.so.6.
Why do we need mktemp in Linux man pages?
Ok actually it is written clearly in man pages. mktemp – create a temporary file or directory. Create a temporary file or directory, safely, and print its name. It create a file or directory safely means no other user can access it, that’s why its permission is 600
Do you have to use mktemp in libc?
If you have to use mktemp then there is not anything you can do to suppress that warning short of removing the section that uses mktemp from libc.so.6. Why do you have to use mktemp?
What’s the best way to write mktemp to disk?
Use a native OS API if you really need to write to the disk. Or mkstemp () as suggested. If you are statically linking the runtime, then the other option is to write your own version of mktemp in an object file. The linker should prefer your version over the runtime version.