3.4 The following sequence of code has been observed in various programs: dup2 (fd, 0); dup2...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
3.4 The following sequence of code has been observed in various programs: dup2 (fd, 0); dup2 (fd, 1); dup2 (fd, 2); if (fd > 2) close(fd); To see why the if test is needed, assume that fd is 1 and draw a picture of what happens to the three descriptor entries and the corresponding file table entry with each call to dup2. Then assume that fd is 3 and draw the same picture. 3.4 The following sequence of code has been observed in various programs: dup2 (fd, 0); dup2 (fd, 1); dup2 (fd, 2); if (fd > 2) close(fd); To see why the if test is needed, assume that fd is 1 and draw a picture of what happens to the three descriptor entries and the corresponding file table entry with each call to dup2. Then assume that fd is 3 and draw the same picture.
Expert Answer:
Answer rating: 100% (QA)
3 If fd is 1 then the dup2fd 1 gives back 1 without get terminated t... View the full answer
Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
Posted Date:
Students also viewed these programming questions
-
A high gravity wall with a height of five feet, six inches is used to contain a soil with an equivalent fluid density of 30 pcf. If concrete has a density of 150 pcf, de- termine the wall's factor of...
-
The fixed budget for 21,300 units of production shows sales of $468,600; variable costs of $63,900; and fixed costs of $143,000. The company's actual sales were 26,300 units at $531,600. Actual...
-
The following sequence of virtual page numbers is encountered in the course of execution on a computer with virtual memory: 3 4 2 6 4 7 1 3 2 6 3 5 1 2 3 Assume that a least recently used page...
-
In a bank reconciliation, deposits in transit are: (a) deducted from the book balance. (b) added to the book balance. (c) added to the bank balance. (d) deducted from the bank balance.
-
A vertical parallel-plate capacitor is half filled with a dielectric for which the dielectric constant is 2.00 (Fig. P26.70a). When this capacitor is positioned horizontally, what fraction of it...
-
A copper rod of length 0.50 m and cross-sectional area 6.0 Ã 102 cm2 is connected to an iron rod with the same cross section and length 0.25 m. One end of the copper is immersed in boiling...
-
A hypothetical mixture of four species, A, B, C, and D, is to be separated into four separate components. Two different separator types are being considered, neither of which requires a mass...
-
A spherical droplet of liquid A and radius ro evaporates into a stagnant layer of gas B. Derive an expression for the evaporation rate of species A in terms of the saturation pressure of species A,...
-
Entry for Issuing Materials Materials issued are as follows: Requisition No. Material Job No. Amount 201 Aluminum 500 86,040 202 Plastic 503 29,340 203 Rubber 504 3,530 204 Glue Indirect 2,220 205...
-
Jaguar Plastics Company has been operating for three years. At December 31 of last year, the accounting records reflected the following: Cash Investments (short- term) Accounts receivable Inventory...
-
Use your Golden-ratio search Matlab script to find the minimum of f(x) = x + 2x + 8x + 5x x = 2 Xu 1 =
-
Develop a yearly budget for an HIM Department. The 2023 budget was $1,048,490.00. You have 24 employees in the department: 8 in the Coding unit, 5 in the ROI unit, 2 in the File unit, 2 in the CDI...
-
What research that examines the prevalence of mental health disorders among veterans, barriers to accessing mental healthcare, and the effectiveness of existing initiatives in addressing the gap.
-
The society of prison has a unique culture. Few, if any, other environments are so isolated from normal living and society that they result in such a distinct culture. This results from the forced...
-
One of the things mentioned in this reading is about a major problem being a "preoccupation with details while giving inadequate attention to the basic objectives that underlie our practice". Why...
-
Systems thinking is a new concept for many people. For this first discussion, apply what you have learned thus far about systems thinking. Pretend you are explaining systems thinking to someone in...
-
Gilcrest Patio Furnishings, Inc. (GPF), manufactures patio furniture from PVC pipe. The company was founded in 1976 as one of the first manufac- turers to utilize plastic pipe products and...
-
The swap spread is the difference between the swap rate and the equivalent-maturity Treasury bond yield. Explain why a widening swap spread may be a signal of deteriorating economic conditions. Plot...
-
On July 1, 2012, Ted, age 73 and single, sells his personal residence of the last 30 years for $365,000. Ted's basis in his residence is $35,000. The expenses associated with the sale of his home...
-
Harold Conners (Social Security number 785-23-9873) lives at 13234 DeMilo Drive, Houston, TX 77052, and is self-employed for 2012. He estimates his required annual estimated tax payment for 2012 to...
-
Linda and Richard are married and file a joint return for 2012. During the year, Linda, who works as an accountant for a national airline, used $2,100 worth of free passes for travel on the airline;...
-
In a/an ................ system, neither mass nor energy transfer takes place across its boundary.
-
In a ................, mass, momentum and energy may flow.
-
Potential energy is an ................ property.
Study smarter with the SolutionInn App