hi: 2011/2/6 loody <[email protected]>: > hi all: > I want to use snprintf for collecting debug message and print it later. > But I found : > 1. when I add "\n" as below, the buffer will be cleared, that means > the "irq status" will put at the head of Buffer instead of at the end > of "ehci work". > Size -= snprintf (Buffer , Size,"ehci_work\n"); > Size -= snprintf (Buffer , Size,"irq status 0x%x\n",status); > is it possible to add "\n" in the buffer, but will will not reset the buffer? > > 2. instead of snprintf, is there any better idea for saving debug > message and show it out later? 3. is there any function in kernel, like snprintf, which will also collect strings but tread the buffer as ring buffer, such that I will not need to take care the overflow. BR, miloody
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